Arizona Plants Checklist - 488 KB Text File This is a checklist of Arizona, USA plant species. The plant species are listed alphabetically by scientific name, which is followed by the common name. The indented scientific names are plant synonyms. This list has been edited for improved reading clarity and to reduce file size. The data for this list was obtained from the National PLANTS Database in 2004. National PLANTS Database symbols, citations, and hyperlinks have been removed. To view the complete, unedited checklist, please visit http://plants.usda.gov/checklist.html to generate an Arizona plants checklist. The generated checklist is contained in five very large, temporary html files. *** For information about a specific plant species, visit http://plants.usda.gov/ and use the Plants Name Search feature. The original of this file can be found at Wildflowers of Tucson: http://www.fireflyforest.com/flowers/ USDA, NRCS. 2004. The PLANTS Database, Version 3.5 (http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA 70874-4490 USA. Scientific Name Common Name Abies fir Abies concolor white fir Abies concolor var. concolor white fir Abies lasiocarpa subalpine fir Abies lasiocarpa var. arizonica corkbark fir Abies arizonica Abies lasiocarpa var. lasiocarpa subalpine fir Abies balsamea var. fallax Abies balsamea ssp. lasiocarpa Abies bifolia Abies subalpina Abronia sand verbena Abronia angustifolia purple sand verbena Abronia angustifolia var. arizonica Abronia torreyi Abronia elliptica fragrant white sand verbena Abronia fragrans var. elliptica Abronia pumila Abronia ramosa Abronia salsa Abronia fragrans snowball sand verbena Abronia fragrans var. glaucescens Abronia nana dwarf sand verbena Abronia nana var. nana dwarf sand verbena Abronia nana var. lanciformis Abronia villosa desert sand verbena Abronia villosa var. villosa desert sand verbena Abutilon Indian mallow Abutilon abutiloides shrubby Indian mallow Abutilon americanum Abutilon jacquinii Abutilon lignosum Abutilon incanum pelotazo Abutilon incanum ssp. incanum pelotazo Abutilon incanum ssp. pringlei Pringle's abutilon Abutilon pringlei Abutilon malacum yellow Indian mallow Abutilon mollicomum Sonoran Indian mallow Abutilon sonorae Abutilon palmeri Palmer's Indian mallow Abutilon parishii Parish's Indian mallow Abutilon parvulum dwarf Indian mallow Abutilon reventum yellowflower Indian mallow Abutilon theophrasti velvetleaf Abutilon abutilon Abutilon avicennae Abutilon thurberi Thurber's Indian mallow Acacia acacia Acacia angustissima prairie acacia Acacia angustissima var. hirta prairie acacia Acacia hirta Acaciella hirta Acacia angustissima var. shrevei Shreve's prairie acacia Acacia hirta ssp. lemmonii Acacia lemmonii Acaciella shrevei Acacia angustissima var. suffrutescens prairie acacia Acacia angustissima var. cuspidata Acacia cuspidata Acacia angustissima var. texensis prairie wattle Acacia angustissima var. cuspidata Acacia cuspidata Acacia texensis Acacia constricta whitethorn acacia Acacia constricta var. constricta whitethorn acacia Acacia constricta var. paucispina whitethorn acacia Acacia farnesiana sweet acacia Acacia minuta Acacia minuta ssp. densiflora Acacia smallii Mimosa farnesiana Pithecellobium minutum Vachellia densiflora Vachellia farnesiana Acacia greggii catclaw acacia Acacia greggii var. greggii catclaw acacia Acacia greggii var. arizonica Acacia millefolia milfoil wattle Acacia neovernicosa viscid acacia Acacia constricta var. vernicosa Acacia vernicosa Acacia redolens bank catclaw Acalypha copperleaf Acalypha californica California copperleaf Acalypha pringlei Acalypha mexicana Mexican copperleaf Acalypha indica var. mexicana Acalypha neomexicana New Mexico copperleaf Acalypha ostryifolia pineland threeseed mercury Acalypha caroliniana Acalypha phleoides shrubby copperleaf Acalypha lindheimeri Acalypha lindheimeri var. major Acamptopappus goldenhead Acamptopappus sphaerocephalus rayless goldenhead Acamptopappus sphaerocephalus var. sphaerocephalus rayless goldenhead Aplopappus sphaerocephalus Acer maple Acer glabrum Rocky Mountain maple Acer glabrum var. diffusum Rocky Mountain maple Acer diffusum Acer glabrum ssp. diffusum Acer glabrum var. glabrum Rocky Mountain maple Acer glabrum var. tripartitum Acer glabrum var. typicum Acer tripartitum Acer glabrum var. neomexicanum New Mexico maple Acer glabrum ssp. neomexicanum Acer glabrum var. parviflorum Acer neomexicanum Acer grandidentatum bigtooth maple Acer grandidentatum var. grandidentatum bigtooth maple Acer saccharum ssp. grandidentatum Acer saccharum var. grandidentatum Saccharodendron grandidentatum Acer grandidentatum var. sinuosum canyon maple Acer brachypterum Acer grandidentatum var. brachypterum Acer saccharum ssp. brachypterum Acer saccharum var. sinuosum Acer sinuosum Acer negundo boxelder Acer negundo var. arizonicum Arizona boxelder Acer negundo var. interius boxelder Acer interius Acer negundo ssp. interius Negundo aceroides ssp. interius Negundo interius Achillea yarrow Achillea millefolium common yarrow Achillea millefolium var. alpicola common yarrow Achillea alpicola Achillea fusca Achillea lanulosa ssp. alpicola Achillea lanulosa var. alpicola Achillea millefolium var. fusca Achillea subalpina Achillea millefolium var. occidentalis western yarrow Achillea angustissima Achillea aspleniifolia Achillea eradiata Achillea gracilis Achillea laxiflora Achillea lanulosa Achillea lanulosa var. arachnoidea Achillea lanulosa var. eradiata Achillea lanulosa ssp. typica Achillea millefolium var. aspleniifolia Achillea millefolium var. gracilis Achillea millefolium ssp. lanulosa Achillea millefolium var. lanulosa Achillea millefolium ssp. occidentalis Achillea millefolium ssp. pallidotegula Achillea millefolium var. rosea Achillea millefolium var. russeolata Achillea occidentalis Achillea rosea Achillea tomentosa Achnatherum needlegrass Achnatherum aridum Mormon needlegrass Stipa arida Achnatherum xbloomeri [hymenoides x occidentale] Oryzopsis bloomeri Stipa bloomeri Stiporyzopsis bloomeri Achnatherum eminens southwestern needlegrass Stipa eminens Achnatherum hymenoides Indian ricegrass Eriocoma cuspidata Oryzopsis hymenoides Stipa hymenoides Achnatherum lemmonii Lemmon's needlegrass Achnatherum lemmonii var. lemmonii Lemmon's needlegrass Stipa lemmonii Stipa lemmonii var. jonesii Achnatherum lettermanii Letterman's needlegrass Stipa lettermanii Achnatherum lobatum littleawn needlegrass Stipa lobata Achnatherum nelsonii Columbia needlegrass Achnatherum nelsonii ssp. dorei Dore's needlegrass Stipa columbiana Stipa minor Stipa nelsonii ssp. dorei Stipa nelsonii var. dorei Stipa occidentalis var. minor Achnatherum nelsonii ssp. nelsonii Columbia needlegrass Stipa columbiana var. nelsonii Stipa nelsonii Stipa occidentalis var. nelsonii Stipa williamsii Achnatherum occidentale western needlegrass Achnatherum occidentale ssp. occidentale western needlegrass Stipa occidentalis Achnatherum parishii Parish's needlegrass Achnatherum parishii var. parishii Parish's needlegrass Stipa coronata var. parishii Stipa parishii Achnatherum perplexum New Mexico needlegrass Stipa perplexa Achnatherum robustum sleepygrass Stipa robusta Stipa vaseyi Achnatherum scribneri Scribner needlegrass Stipa scribneri Achnatherum speciosum desert needlegrass Stipa speciosa Achyronychia achyronychia Achyronychia cooperi onyxflower Acleisanthes trumpets Acleisanthes longiflora angel's trumpets Aconitum monkshood Aconitum columbianum Columbian monkshood Aconitum columbianum ssp. columbianum Columbian monkshood Aconitum columbianum var. bakeri Aconitum columbianum var. ochroleucum Aconitum columbianum ssp. pallidum Aconitum geranioides Aconitum leibergii Aconitum mogollonicum Aconitum infectum Arizona monkshood Acourtia desertpeony Acourtia nana dwarf desertpeony Perezia nana Acourtia thurberi Thurber's desertpeony Perezia thurberi Acourtia wrightii brownfoot Perezia wrightii Acroptilon hardheads Acroptilon repens hardheads Centaurea picris Centaurea repens Actaea baneberry Actaea rubra red baneberry Actaea rubra ssp. arguta red baneberry Actaea arguta Actaea arguta var. viridiflora Actaea rubra var. arguta Actaea spicata var. arguta Adenophyllum dogweed Adenophyllum cooperi Cooper's dogweed Dyssodia cooperi Adenophyllum porophylloides San Felipe dogweed Dyssodia porophylloides Adenophyllum porophyllum poreleaf dogweed Dyssodia porophylla Pteronia porophylla Adenophyllum wrightii Wright's dogweed Dyssodia neomexicana Hymenatherum neomexicanum Adiantum maidenhair fern Adiantum aleuticum Aleutian maidenhair Adiantum pedatum var. aleuticum Adiantum pedatum ssp. aleuticum Adiantum pedatum ssp. calderi Adiantum pedatum ssp. subpumilum Adiantum pedatum var. subpumilum Adiantum capillus-veneris common maidenhair Adiantum capillus-veneris var. modestum Adiantum capillus-veneris var. protrusum Adiantum modestum Aegilops goatgrass Aegilops cylindrica jointed goatgrass Aegilops cylindrica var. rubiginosa Aegilops tauschii Cylindropyrum cylindricum Triticum cylindricum Aegopogon relaxgrass Aegopogon tenellus fragilegrass Aegopogon tenellus var. abortivus Lamarckia tenella Aeschynomene jointvetch Aeschynomene villosa hairy jointvetch Agastache giant hyssop Agastache breviflora TransPecos giant hyssop Agastache micrantha white giant hyssop Cedronella micrantha Agastache pallida pale giant hyssop Agastache barberi Agastache pallidiflora Bill Mountain giant hyssop Agastache pallidiflora ssp. pallidiflora Bill Mountain giant hyssop Agastache pallidiflora ssp. pallidiflora var. gilensis Bill Mountain giant hyssop Agastache pallidiflora ssp. pallidiflora var. greenei Bill Mountain giant hyssop Agastache greenei Agastache pallidiflora ssp. pallidiflora var. pallidiflora Bill Mountain giant hyssop Agastache pallidiflora ssp. typica Agastache rupestris threadleaf giant hyssop Agastache wrightii Sonoran giant hyssop Agave agave Agave americana American century plant Agave americana ssp. americana American century plant Agave americana ssp. americana var. expansa American century plant Agave arizonica Arizona century plant Agave chrysantha goldenflower century plant Agave palmeri var. chrysantha Agave delamateri Agave deserti desert agave Agave deserti ssp. simplex desert agave Agave mckelveyana McKelvey's century plant Agave murpheyi Murphey's century plant Agave palmeri Palmer's century plant Agave parryi Parry's agave Agave parryi ssp. parryi Parry's agave Agave huachucensis Agave parryi var. couesii Agave parryi var. huachucensis Agave scabra Agave parviflora smallflower century plant Agave schottii Schott's century plant Agave schottii var. schottii Schott's century plant Agave schottii var. treleasei Trelease's century plant Agave toumeyana Toumey's century plant Agave toumeyana var. bella Toumey's century plant Agave toumeyana ssp. bella Agave toumeyana var. toumeyana Toumey's century plant Agave utahensis Utah agave Agave utahensis var. kaibabensis Kaibab agave Agave kaibabensis Agave utahensis ssp. kaibabensis Agave utahensis var. utahensis Utah agave Ageratina snakeroot Ageratina herbacea fragrant snakeroot Eupatorium herbaceum Ageratina lemmonii Lemmon's snakeroot Eupatorium lemmonii Ageratina paupercula Santa Rita snakeroot Eupatorium pauperculum Ageratina rothrockii Rothrock's snakeroot Eupatorium rothrockii Ageratina wrightii Wright's snakeroot Eupatorium wrightii Ageratum whiteweed Ageratum corymbosum flat-top whiteweed Ageratum guatemalense Agoseris agoseris Agoseris aurantiaca orange agoseris Agoseris aurantiaca var. purpurea orange agoseris Agoseris aurantiaca ssp. purpurea Agoseris glauca pale agoseris Agoseris glauca var. dasycephala pale agoseris Agoseris glauca var. asper Agoseris glauca var. pumila Agoseris glauca ssp. scorzonerifolia Agoseris scorzonerifolia Troximon glaucum var. dasycephalum Agoseris glauca var. glauca pale agoseris Agoseris turbinata Troximon glaucum Agoseris glauca var. laciniata false agoseris Agoseris arizonica Agoseris glauca var. parviflora Agoseris parviflora Macrorhynchus glaucus var. laciniatus Troximon parviflorum Agoseris heterophylla annual agoseris Agoseris heterophylla var. heterophylla annual agoseris Agoseris heterophylla ssp. californica Agoseris heterophylla var. cryptopleura Agoseris heterophylla var. kymapleura Agoseris heterophylla ssp. normalis Macrorhynchus heterophyllus Agrimonia agrimony Agrimonia gryposepala tall hairy agrimony Agrimonia striata roadside agrimony Agropyron wheatgrass Agropyron desertorum desert wheatgrass Agropyron cristatum ssp. desertorum Agropyron cristatum var. desertorum Agrostis bentgrass Agrostis elliottiana Elliott's bentgrass Agrostis exigua Agrostis exarata spike bentgrass Agrostis aenea Agrostis alaskana Agrostis ampla Agrostis asperifolia Agrostis exarata var. minor Agrostis exarata var. monolepis Agrostis exarata ssp. minor Agrostis exarata var. purpurascens Agrostis exarata var. pacifica Agrostis longiligula Agrostis longiligula var. australis Agrostis melaleuca Agrostis microphylla var. major Agrostis gigantea redtop Agrostis alba Agrostis gigantea var. dispar Agrostis nigra Agrostis stolonifera ssp. gigantea Agrostis stolonifera var. major Agrostis idahoensis Idaho bentgrass Agrostis borealis var. recta Agrostis clavata Agrostis filicumis Agrostis scabra rough bentgrass Agrostis geminata Agrostis hyemalis var. geminata Agrostis hyemalis var. tenuis Agrostis scabra var. geminata Agrostis scabra var. septentrionalis Agrostis scabra ssp. septentrionalis Agrostis stolonifera creeping bentgrass Agrostis alba var. palustris Agrostis alba var. stolonifera Agrostis maritima Agrostis palustris Agrostis stolonifera var. compacta Agrostis stolonifera var. palustris Ailanthus ailanthus Ailanthus altissima tree of heaven Ailanthus glandulosa Albizia albizia Albizia julibrissin silktree Aletes Indian parsley Aletes macdougalii MacDougal's Indian parsley Aletes macdougalii ssp. macdougalii MacDougal's Indian parsley Cymopterus macdougalii Oreoxis macdougalii Alhagi alhagi Alhagi maurorum camelthorn Alhagi camelorum Alhagi pseudalhagi Alisma water plantain Alisma gramineum narrowleaf water plantain Alisma geyeri Alisma gramineum var. angustissimum Alisma gramineum var. geyeri Alisma gramineum var. graminifolium Alisma gramineum var. wahlenbergii Alisma lanceolatum Alisma subcordatum American water plantain Alisma plantago-aquatica var. parviflorum Alisma plantago-aquatica ssp. subcordatum Alisma triviale northern water plantain Alisma brevipes Alisma plantago-aquatica var. americanum Alisma plantago-aquatica ssp. brevipes Alisma plantago-aquatica var. brevipes Allenrolfea allenrolfea Allenrolfea occidentalis iodinebush Halostachys occidentalis Allionia windmills Allionia choisyi annual windmills Allionia incarnata trailing windmills Allionia incarnata var. incarnata trailing windmills Allionia cristata Wedelia cristata Allionia incarnata var. nudata trailing windmills Allionia incarnata var. villosa trailing windmills Allium onion Allium acuminatum tapertip onion Allium acuminatum var. cuspidatum Allium atrorubens darkred onion Allium atrorubens var. cristatum darkred onion Allium atrorubens ssp. inyoensis Allium atrorubens var. inyoensis Allium cristatum Allium inyonis Allium nevadense var. cristatum Allium bigelovii Bigelow's onion Allium bisceptrum twincrest onion Allium bisceptrum var. palmeri aspen onion Allium palmeri Allium cernuum nodding onion Allium cernuum var. neomexicanum New Mexican nodding onion Allium neomexicanum Allium cernuum var. obtusum nodding onion Allium natans Allium recurvatum Allium geyeri Geyer's onion Allium geyeri var. geyeri Geyer's onion Allium dictyotum Allium geyeri var. tenerum bulbil onion Allium arenicola Allium fibrosum Allium geyeri var. graniferum Allium geyeri ssp. tenerum Allium rubrum Allium rydbergii Allium sabulicola Allium glandulosum gland onion Allium rhizomatum Allium gooddingii Goodding's onion Allium kunthii Kunth's onion Allium scaposum Schoenoprasum lineare Allium macropetalum largeflower onion Allium nevadense Nevada onion Allium parishii Parish's onion Allium plummerae Tanners Canyon onion Allophyllum false gilyflower Allophyllum gilioides dense false gilyflower Allophyllum gilioides ssp. gilioides dense false gilyflower Gilia gilioides Almutaster alkalai marsh aster Almutaster pauciflorus alkalai marsh aster Aster hydrophilus Aster pauciflorus Alnus alder Alnus incana gray alder Alnus incana ssp. tenuifolia thinleaf alder Alnus incana var. occidentalis Alnus incana var. virescens Alnus xpurpusii Alnus tenuifolia Alnus oblongifolia Arizona alder Alopecurus foxtail Alopecurus aequalis shortawn foxtail Alopecurus aequalis var. aequalis shortawn foxtail Alopecurus aequalis var. natans Alopecurus aristulatus Alopecurus geniculatus var. aristulatus Alopecurus carolinianus Carolina foxtail Alopecurus macounii Alopecurus ramosus Alopecurus geniculatus water foxtail Alopecurus pallescens Aloysia beebrush Aloysia gratissima whitebrush Aloysia ligustrina of authors Lippia ligustrina of authors Aloysia gratissima var. schulziae whitebrush Aloysia lycioides var. schulziae Aloysia wrightii Wright's beebrush Lippia wrightii Alternanthera joyweed Alternanthera caracasana washerwoman Achyranthes peploides Alternanthera peploides Amaranthus pigweed Amaranthus acanthochiton greenstripe Acanthochiton wrightii Amaranthus albus prostrate pigweed Amaranthus albus var. pubescens Amaranthus graecizans Amaranthus graecizans var. pubescens Amaranthus pubescens Amaranthus blitoides mat amaranth Amaranthus graecizans Amaranthus crassipes spreading amaranth Amaranthus cruentus red amaranth Amaranthus hybridus ssp. cruentus Amaranthus hybridus var. cruentus Amaranthus paniculatus Amaranthus fimbriatus fringed amaranth Amaranthus fimbriatus var. denticulatus fringed amaranth Amaranthus fimbriatus var. fimbriatus fringed amaranth Amaranthus hybridus slim amaranth Amaranthus chlorostachys Amaranthus incurvatus Amaranthus patulus Amaranthus hypochondriacus Prince-of-Wales feather Amaranthus hybridus ssp. hypochondriacus Amaranthus leucocarpus Amaranthus obcordatus Trans-Pecos amaranth Amaranthus palmeri carelessweed Amaranthus powellii Powell's amaranth Amaranthus bouchonii Amaranthus bracteosus Amaranthus retroflexus var. powellii Amaranthus viscidulus Amaranthus retroflexus redroot amaranth Amaranthus retroflexus var. salicifolius Amaranthus torreyi Torrey's amaranthus Amaranthus viridis slender amaranth Amaranthus gracilis Amaranthus watsonii Watson's amaranth Amaranthus torreyi Amaranthus wrightii Wright's amaranth Ambrosia ragweed Ambrosia acanthicarpa flatspine burr ragweed Franseria acanthicarpa Gaertneria acanthicarpa Ambrosia ambrosioides ambrosia leaf burr ragweed Franseria ambrosioides Ambrosia artemisiifolia annual ragweed Ambrosia artemisiifolia var. elatior annual ragweed Ambrosia elatior Ambrosia confertiflora weakleaf burr ragweed Franseria confertiflora Franseria strigulosa Gaertneria tenuifolia Ambrosia cordifolia Tucson burr ragweed Franseria cordifolia Ambrosia deltoidea triangle burr ragweed Franseria deltoidea Ambrosia dumosa burrobush Franseria dumosa Ambrosia eriocentra woolly fruit burr ragweed Franseria eriocentra Ambrosia ilicifolia hollyleaf burr ragweed Franseria ilicifolia Ambrosia psilostachya Cuman ragweed Ambrosia californica Ambrosia coronopifolia Ambrosia cumanensis Ambrosia psilostachya var. californica Ambrosia psilostachya var. coronopifolia Ambrosia psilostachya var. lindheimeriana Ambrosia rugelii Ambrosia tomentosa skeletonleaf burr ragweed Franseria discolor Franseria tomentosa Gaertneria discolor Gaertneria tomentosa Ambrosia trifida great ragweed Ambrosia trifida var. texana Texan great ragweed Ambrosia aptera Ambrosia trifida var. aptera Ambrosia trifida var. trifida great ragweed Ambrosia trifida var. integrifolia Amelanchier serviceberry Amelanchier pumila dwarf serviceberry Amelanchier alnifolia var. pumila Amelanchier basalticola Amelanchier cuneata Amelanchier glabra Amelanchier polycarpa Amelanchier utahensis Utah serviceberry Amelanchier utahensis var. covillei Coville's serviceberry Amelanchier covillei Amelanchier utahensis ssp. covillei Amelanchier utahensis var. utahensis Utah serviceberry Amelanchier alnifolia var. oreophila Amelanchier alnifolia var. utahensis Amelanchier australis Amelanchier bakeri Amelanchier goldmanii Amelanchier mormonica Amelanchier oreophila Ammannia redstem Ammannia auriculata eared redstem Ammannia auriculata var. arenaria Ammannia coccinea valley redstem Ammannia coccinea ssp. purpurea Ammannia teres Ammannia robusta grand redstem Ammannia coccinea ssp. robusta Ammi ammi Ammi majus large bullwort Ammocodon ammocodon Ammocodon chenopodioides goosefoot moonpod Selinocarpus chenopodioides Ammoselinum sandparsley Ammoselinum giganteum western sandparsley Amoreuxia yellowshow Amoreuxia gonzalezii Santa Rita mountain yellowshow Amoreuxia palmatifida Mexican yellowshow Amorpha false indigo Amorpha californica California false indigo Amorpha californica var. californica California false indigo Amorpha californica var. hispidula Amorpha fruticosa desert false indigo Amorpha angustifolia Amorpha bushii Amorpha croceolanata Amorpha curtissii Amorpha dewinkeleri Amorpha fruticosa var. angustifolia Amorpha fruticosa var. croceolanata Amorpha fruticosa var. emarginata Amorpha fruticosa var. occidentalis Amorpha fruticosa var. oblongifolia Amorpha fruticosa var. tennesseensis Amorpha occidentalis Amorpha occidentalis var. arizonica Amorpha occidentalis var. emarginata Amorpha tennesseensis Amorpha virgata Amphipappus chaffbush Amphipappus fremontii Fremont's chaffbush Amphipappus fremontii ssp. spinosus Fremont's chaffbush Amphipappus fremontii var. spinosus Amphiachyris spinosa Amsinckia fiddleneck Amsinckia menziesii Menzies' fiddleneck Amsinckia menziesii var. intermedia common fiddleneck Amsinckia arizonica Amsinckia demissa Amsinckia echinata Amsinckia intermedia Amsinckia intactilis Amsinckia intermedia var. echinata Amsinckia microphylla Amsinckia nana Amsinckia rigida Amsinckia tessellata bristly fiddleneck Amsinckia tessellata var. tessellata bristly fiddleneck Amsinckia densirugosa Amsinckia hendersonii Amsinckia washingtonensis Amsonia bluestar Amsonia grandiflora Arizona bluestar Amsonia jonesii Jones' bluestar Amsonia kearneyana Kearney's bluestar Amsonia palmeri Palmer's bluestar Amsonia hirtella Amsonia hirtella var. pogonosepala Amsonia pogonosepala Amsonia standleyi Amsonia peeblesii Peebles' bluestar Amsonia tomentosa woolly bluestar Amsonia tomentosa var. stenophylla woolly bluestar Amsonia arenaria Amsonia eastwoodiana Amsonia tomentosa var. tomentosa woolly bluestar Amsonia brevifolia Anagallis pimpernel Anagallis arvensis scarlet pimpernel Anagallis arvensis ssp. arvensis scarlet pimpernel Anagallis minima chaffweed Centunculus minimus Anaphalis pearly everlasting Anaphalis margaritacea western pearly everlasting Anaphalis margaritacea var. angustior Anaphalis margaritacea var. intercedens Anaphalis margaritacea var. occidentalis Anaphalis margaritacea var. revoluta Anaphalis margaritacea var. subalpina Anaphalis occidentalis Gnaphalium margaritaceum Andropogon bluestem Andropogon gerardii big bluestem Andropogon chrysocomus Andropogon furcatus Andropogon gerardii var. chrysocomus Andropogon provincialis Andropogon glomeratus bushy bluestem Andropogon glomeratus var. pumilus bushy bluestem Andropogon tenuispatheus Andropogon hallii sand bluestem Andropogon gerardii var. incanescens Andropogon gerardii var. paucipilus Andropogon hallii var. incanescens Andropogon paucipilus Androsace rockjasmine Androsace occidentalis western rockjasmine Androsace arizonica Androsace occidentalis var. arizonica Androsace occidentalis var. simplex Androsace septentrionalis pygmyflower rockjasmine Androsace septentrionalis ssp. glandulosa pygmyflower rockjasmine Androsace glandulosa Androsace septentrionalis var. glandulosa Androsace septentrionalis ssp. puberulenta pygmyflower rockjasmine Androsace puberulenta Androsace septentrionalis var. puberulenta Androsace septentrionalis ssp. subulifera pygmyflower rockjasmine Androsace diffusa Androsace septentrionalis var. diffusa Androsace septentrionalis var. subulifera Androstephium funnel lily Androstephium breviflorum pink funnel lily Anemone anemone Anemone cylindrica candle anemone Anemone multifida Pacific anemone Anemone multifida var. hudsoniana Hudson's anemone Anemone globosa Anemone hudsoniana Anemone multifida var. globosa Anemone multifida var. nowosadii Anemone multifida var. stylosa Pacific anemone Anemone quinquefolia var. stylosa Anemone stylosa Anemone tuberosa tuber anemone Anemone tuberosa var. tuberosa tuber anemone Anemopsis yerba mansa Anemopsis californica yerba mansa Anemopsis californica var. subglabra Anethum dill Anethum graveolens dill Angelica angelica Angelica pinnata small-leaf angelica Anisacanthus desert honeysuckle Anisacanthus thurberi Thurber's desert honeysuckle Drejera thurberi Anisocoma anisocoma Anisocoma acaulis scalebud Anoda anoda Anoda abutiloides Indian anoda Anoda crenatiflora thicket anoda Anoda cristata crested anoda Anoda acerifolia Anoda cristata var. brachyantha Anoda cristata var. digitata Anoda lavaterioides Sida cristata Anoda lanceolata lanceleaf anoda Anoda wrightii Anoda pentaschista field anoda Anoda pentaschista var. obtusior Anoda reticulata netted anoda Anoda thurberi Arizona anoda Antennaria pussytoes Antennaria marginata whitemargin pussytoes Antennaria dioica var. marginata Antennaria fendleri Antennaria peramoena Antennaria media Rocky Mountain pussytoes Antennaria alpina var. media Antennaria austromontana Antennaria candida Antennaria densa Antennaria gormanii Antennaria modesta Antennaria mucronata Antennaria parvifolia small-leaf pussytoes Antennaria aprica Antennaria aprica var. minuscula Antennaria aureola Antennaria holmii Antennaria latisquamea Antennaria minuscula Antennaria obtusata Antennaria pumila Antennaria recurva Antennaria rhodanthus Antennaria rosea rosy pussytoes Antennaria rosea ssp. arida rosy pussytoes Antennaria arida Antennaria arida ssp. viscidula Antennaria scariosa Antennaria rosea ssp. confinis rosy pussytoes Antennaria albicans Antennaria angustifolia Antennaria arida var. humilis Antennaria ?brevistyla Antennaria breitungii Antennaria concinna Antennaria confinis Antennaria dioica var. kernensis Antennaria elegans Antennaria foliacea var. humilis Antennaria incarnata Antennaria laingii Antennaria leuchippii Antennaria leontopodioides Antennaria rosea var. angustifolia Antennaria sedoides Antennaria sordida Antennaria straminea Antennaria subviscosa Antennaria tomentella Antennaria rosea ssp. pulvinata pulvinate pussytoes Antennaria affinis Antennaria albescens Antennaria fusca Antennaria gaspensis Antennaria howellii ssp. gaspensis Antennaria isolepis Antennaria maculata Antennaria manicouagana Antennaria media ssp. fusca Antennaria neglecta var. gaspensis Antennaria neodioica var. gaspensis Antennaria peasei Antennaria pulvinata Antennaria pulvinata ssp. albescens Antennaria sansonii Antennaria umbrinella Antennaria rosulata Kaibab pussytoes Antennaria bakeri Antennaria sierrae-blancae Anthemis chamomile Anthemis cotula stinking chamomile Maruta cotula Antheropeas easterbonnets Antheropeas lanosum white easterbonnets Eriophyllum lanosum Antheropeas wallacei woolly easterbonnets Eriophyllum wallacei Eriophyllum wallacei ssp. australe Eriophyllum wallacei var. calvescens Eriophyllum wallacei var. rubellum Anthriscus chervil Anthriscus caucalis burr chervil Anthriscus neglecta var. scandix Anthriscus scandicina Anulocaulis ringstem Anulocaulis leiosolenus southwestern ringstem Anulocaulis leiosolenus var. leiosolenus southwestern ringstem Boerhavia leiosolena Apacheria apacheria Apacheria chiricahuensis apachebush Apera silkybent Apera interrupta dense silkybent Agrostis interrupta Aphanostephus dozedaisy Aphanostephus ramosissimus plains dozedaisy Aphanostephus ramosissimus var. humilis plains dozedaisy Aphanostephus arizonicus Aphanostephus humilis Aphanostephus potosinus Leucopsidium humile Apiastrum apiastrum Apiastrum angustifolium mock parsley Apium celery Apium graveolens wild celery Apium graveolens var. dulce wild celery Apium dulce Celeri graveolens Aplectrum Adam and Eve Aplectrum hyemale Adam and Eve Apocynum dogbane Apocynum androsaemifolium spreading dogbane Apocynum ambigens Apocynum androsaemifolium var. glabrum Apocynum androsaemifolium var. griseum Apocynum androsaemifolium var. intermedium Apocynum androsaemifolium var. incanum Apocynum androsaemifolium ssp. pumilum Apocynum androsaemifolium var. pumilum Apocynum androsaemifolium var. tomentellum Apocynum androsaemifolium var. woodsonii Apocynum pumilum Apocynum pumilum var. rhomboideum Apocynum scopulorum Apocynum cannabinum Indianhemp Apocynum cannabinum var. angustifolium Apocynum cannabinum var. glaberrimum Apocynum cannabinum var. greeneanum Apocynum cannabinum var. hypericifolium Apocynum cannabinum var. nemorale Apocynum cannabinum var. pubescens Apocynum cannabinum var. suksdorfii Apocynum hypericifolium Apocynum pubescens Apocynum sibiricum Apocynum sibiricum var. cordigerum Apocynum sibiricum var. farwellii Apocynum sibiricum var. salignum Apocynum suksdorfii Apocynum suksdorfii var. angustifolium Apocynum xfloribundum pro sp. [androsaemifolium x cannabinum] Apocynum jonesii Apocynum medium Apocynum medium var. floribundum Apocynum medium var. lividum Apocynum medium var. leuconeuron Apocynum medium var. sarniense Apocynum medium var. vestitum Apocynum milleri Apodanthera apodanthera Apodanthera undulata melon loco Aquilegia columbine Aquilegia caerulea Colorado blue columbine Aquilegia coerulea [orthographic variant] Aquilegia caerulea var. pinetorum Colorado blue columbine Aquilegia coerulea var. pinetorum [orthographic variant] Aquilegia chrysantha golden columbine Aquilegia chrysantha var. chrysantha golden columbine Aquilegia chrysantha var. rydbergii Rydberg's golden columbine Aquilegia desertorum desert columbine Aquilegia elegantula western red columbine Aquilegia longissima longspur columbine Aquilegia micrantha Mancos columbine Aquilegia micrantha var. micrantha Mancos columbine Aquilegia triternata Chiricahua Mountain columbine Arabis rockcress Arabis drummondii Drummond's rockcress Arabis brachycarpa Arabis connexa Arabis confinis Arabis drummondii var. connexa Arabis drummondii var. oxyphylla Arabis oxyphylla Boechera drummondii Erysimum drummondii Turritis drummondii Arabis fendleri Fendler's rockcress Arabis fendleri var. fendleri Fendler's rockcress Arabis holboellii var. fendleri Arabis porphyrea Boechera fendleri Arabis glabra tower rockcress Arabis glabra var. furcatipilis Turritis glabra Arabis gracilipes Flagstaff rockcress Arabis hirsuta hairy rockcress Arabis hirsuta var. pycnocarpa creamflower rockcress Arabis hirsuta var. adpressipilis Arabis hirsuta ssp. pycnocarpa Arabis ovata Arabis pycnocarpa Arabis pycnocarpa var. adpressipilis Arabis holboellii Holboell's rockcress Arabis holboellii var. pinetorum Holboell's rockcress Arabis pinetorum Arabis lignifera desert rockcress Boechera lignifera Arabis pendulina rabbitear rockcress Arabis pendulina var. pendulina rabbitear rockcress Arabis diehlii Arabis nevadensis Boechera pendulina Arabis perennans perennial rockcress Arabis angulata Arabis arcuata var. perennans Arabis eremophila Arabis gracilenta Arabis recondita Boechera perennans Arabis pulchra beautiful rockcress Arabis pulchra var. gracilis beautiful rockcress Arabis pulchra var. glabrescens Arabis pulchra var. viridis Arabis trichopoda Arabis pulchra var. pallens beautiful rockcress Arabis formosa Boechera pulchra ssp. pallens Arabis sparsiflora sicklepod rockcress Arabis sparsiflora var. sparsiflora sicklepod rockcress Arabis arcoidea Arabis peramoena Arabis sparsiflora var. peramoena Arabis tricornuta Rincon Mountain rockcress Aralia spikenard Aralia humilis Arizona spikenard Aralia racemosa American spikenard Aralia racemosa ssp. bicrenata American spikenard Aralia bicrenata Arbutus madrone Arbutus arizonica Arizona madrone Arceuthobium dwarf mistletoe Arceuthobium abietinum fir dwarf mistletoe Arceuthobium apachecum Apache dwarf mistletoe Arceuthobium blumeri southwestern white pine dwarf mistletoe Arceuthobium divaricatum pinyon dwarf mistletoe Arceuthobium douglasii Douglas fir dwarf mistletoe Arceuthobium gillii Huachuca Mountain dwarf mistletoe Arceuthobium microcarpum western spruce dwarf mistletoe Arceuthobium vaginatum pineland dwarf mistletoe Arceuthobium vaginatum ssp. cryptopodum pineland dwarf mistletoe Arceuthobium cryptopodum Arceuthobium vaginatum var. cryptopodum Arctium burrdock Arctium minus lesser burrdock Lappa minor Arctomecon bearpoppy Arctomecon californica California bearpoppy Arctostaphylos manzanita Arctostaphylos patula greenleaf manzanita Arctostaphylos acutifolia Arctostaphylos patula var. coalescens Arctostaphylos parryana var. pinetorum Arctostaphylos patula ssp. platyphylla Arctostaphylos pringlei Pringle manzanita Arctostaphylos pringlei ssp. pringlei Pringle manzanita Arctostaphylos pungens pointleaf manzanita Arctostaphylos chaloneorum Arctostaphylos pseudopungens Arctostaphylos pungens ssp. chaloneorum Arctostaphylos uva-ursi kinnikinnick Arctostaphylos adenotricha Arctostaphylos uva-ursi var. adenotricha Arctostaphylos uva-ursi ssp. adenotricha Arctostaphylos uva-ursi var. coactilis Arctostaphylos uva-ursi ssp. coactilis Arctostaphylos uva-ursi ssp. longipilosa Arctostaphylos uva-ursi var. leobreweri Arctostaphylos uva-ursi var. marinensis Arctostaphylos uva-ursi ssp. monoensis Arctostaphylos uva-ursi var. pacifica Arctostaphylos uva-ursi ssp. stipitata Arctostaphylos uva-ursi var. stipitata Arctostaphylos uva-ursi var. suborbiculata Uva-Ursi uva-ursi Arenaria sandwort Arenaria aberrans Mt. Dellenbaugh sandwort Arenaria aculeata prickly sandwort Arenaria congesta var. aculeata Arenaria fendleri var. aculeata Arenaria pumicola var. californica Arenaria salmonensis Eremogone aculeata Arenaria congesta ballhead sandwort Arenaria congesta var. subcongesta subcongesta sandwort Arenaria burkei Arenaria fendleri var. subcongesta Arenaria subcongesta Arenaria eastwoodiae Eastwood's sandwort Arenaria eastwoodiae var. adenophora Eastwood's sandwort Arenaria eastwoodiae var. eastwoodiae Eastwood's sandwort Arenaria fendleri var. eastwoodiae Eremogone eastwoodiae Arenaria fendleri Fendler's sandwort Arenaria fendleri var. brevifolia Fendler's sandwort Arenaria fendleri var. fendleri Fendler's sandwort Arenaria fendleri var. diffusa Eremogone fendleri Arenaria fendleri var. porteri Porter's sandwort Arenaria fendleri var. tweedyi Tweedy's sandwort Arenaria lanuginosa spreading sandwort Arenaria lanuginosa ssp. saxosa spreading sandwort Arenaria confusa Arenaria lanuginosa var. cinerascens Arenaria saxosa Arenaria saxosa var. cinerascens Arenaria saxosa var. mearnsii Spergulastrum lanuginosum ssp. saxosum Arenaria macradenia Mojave sandwort Arenaria macradenia ssp. ferrisiae Ferris' sandwort Arenaria macradenia ssp. macradenia Mojave sandwort Arenaria macradenia ssp. macradenia var. macradenia Mojave sandwort Arenaria congesta var. macradenia Arenaria congesta var. parishiorum Arenaria macradenia var. parishiorum Eremogone macradenia Eremogone parishiorum Argemone pricklypoppy Argemone arizonica Arizona pricklypoppy Argemone corymbosa Mojave pricklypoppy Argemone corymbosa ssp. arenicola Mojave pricklypoppy Argemone corymbosa var. arenicola Argemone corymbosa ssp. corymbosa Mojave pricklypoppy Argemone gracilenta Sonoran pricklypoppy Argemone hispida rough pricklypoppy Argemone bipinnatifida Argemone platyceras var. hispida Argemone mexicana Mexican pricklypoppy Argemone leiocarpa Argemone munita flatbud pricklypoppy Argemone munita ssp. argentea flatbud pricklypoppy Argemone munita var. argentea Argemone munita ssp. rotundata flatbud pricklypoppy Argemone munita var. rotundata Argemone rotundata Argemone ochroleuca Argemone mexicana var. ochroleuca Argemone ochroleuca var. stenophylla Argemone pleiacantha southwestern pricklypoppy Argemone pleiacantha ssp. ambigua southwestern pricklypoppy Argemone pleiacantha var. ambigua Argemone pleiacantha ssp. pleiacantha southwestern pricklypoppy Argemone polyanthemos crested pricklypoppy Argemone intermedia Argemone intermedia var. polyanthemos Argemone platyceras Argentina silverweed Argentina anserina silverweed cinquefoil Argentina anserina var. concolor Argentina argentea Potentilla anserina Potentilla anserina var. concolor Potentilla anserina var. sericea Potentilla anserina var. yukonensis Potentilla egedii ssp. yukonensis Potentilla yukonensis Argyrochosma false cloak fern Argyrochosma incana hairy false cloak fern Notholaena incana Argyrochosma jonesii Jones' false cloak fern Cheilanthes jonesii Notholaena jonesii Pellaea jonesii Argyrochosma limitanea southwestern false cloak fern Argyrochosma limitanea ssp. limitanea southwestern false cloak fern Cheilanthes limitanea Notholaena limitanea Pellaea limitanea Argyrochosma limitanea ssp. mexicana southwestern false cloak fern Cheilanthes limitanea var. mexicana Notholaena limitanea var. mexicana Notholaena limitanea ssp. mexicana Pellaea limitanea var. mexicana Argythamnia silverbush Argythamnia adenophora glandular silverbush Argythamnia brandegeei Sonoran silverbush Argythamnia brandegeei var. intonsa Sonoran silverbush Ditaxis brandegeei var. intonsa Argythamnia claryana desert silverbush Argythamnia adenophora Ditaxis adenophora Ditaxis claryana Argythamnia cyanophylla Charleston Mountain silverbush Ditaxis cyanophylla Ditaxis diversiflora Argythamnia lanceolata narrowleaf silverbush Ditaxis lanceolata Argythamnia mercurialina tall silverbush Argythamnia mercurialina var. mercurialina tall silverbush Ditaxis mercurialina Argythamnia neomexicana New Mexico silverbush Ditaxis neomexicana Argythamnia serrata Yuma silverbush Ditaxis serrata Aristida threeawn Aristida adscensionis sixweeks threeawn Aristida adscensionis var. abortiva Aristida adscensionis var. modesta Aristida fasciculata Aristida arizonica Arizona threeawn Aristida californica California threeawn Aristida californica var. californica California threeawn Aristida californica var. glabrata Santa Rita threeawn Aristida glabrata Aristida divaricata poverty threeawn Aristida havardii Havard's threeawn Aristida barbata Aristida longispica slimspike threeawn Aristida longispica var. longispica slimspike threeawn Aristida gracilis Aristida oligantha prairie threeawn Aristida ramosissima var. chaseana Aristida pansa Wooton's threeawn Aristida dissita Aristida pansa var. dissita Aristida purpurea purple threeawn Aristida purpurea var. fendleriana Fendler's threeawn Aristida fendleriana Aristida purpurea var. longiseta Fendler threeawn Aristida longiseta Aristida longiseta var. robusta Aristida longiseta var. rariflora Aristida purpurea var. robusta Aristida purpurea var. nealleyi blue threeawn Aristida glauca Aristida nealleyi Aristida purpurea var. glauca Aristida reverchonii Aristida stricta var. nealleyi Aristida purpurea var. parishii Parish's threeawn Aristida parishii Aristida wrightii var. parishii Aristida purpurea var. perplexa purple threeawn Aristida purpurea var. purpurea purple threeawn Aristida purpurea var. laxiflora Aristida roemeriana Aristida purpurea var. wrightii Wright's threeawn Aristida brownii Aristida wrightii Aristida schiedeana single threeawn Aristida schiedeana var. orcuttiana Orcutt's threeawn Aristida orcuttiana Aristida ternipes spidergrass Aristida ternipes var. gentilis spidergrass Aristida hamulosa Aristida ternipes var. hamulosa Aristida ternipes var. minor Aristida ternipes var. ternipes spidergrass Aristolochia dutchman's pipe Aristolochia watsonii Watson's dutchman's pipe Aristolochia porphyrophylla Arnica arnica Arnica chamissonis Chamisso arnica Arnica chamissonis ssp. foliosa Chamisso arnica Arnica chamissonis ssp. foliosa var. andina Chamisso arnica Arnica chamissonis var. foliosa Arnica chamissonis var. jepsoniana Arnica foliosa Arnica cordifolia heartleaf arnica Arnica cordifolia ssp. genuina Arnica cordifolia var. humilis Arnica cordifolia var. pumila Arnica cordifolia var. whitneyi Arnica hardinae Arnica humilis Arnica paniculata Arnica whitneyi Arrhenatherum oatgrass Arrhenatherum elatius tall oatgrass Arrhenatherum elatius var. elatius tall oatgrass Arrhenatherum elatius var. biaristatum Avena elatior Artemisia sagebrush Artemisia annua sweet sagewort Artemisia biennis biennial wormwood Artemisia biennis var. biennis biennial wormwood Artemisia bigelovii Bigelow sage Artemisia campestris field sagewort Artemisia campestris ssp. borealis var. scouleriana field sagewort Artemisia camporum Artemisia campestris var. douglasiana Artemisia campestris ssp. pacifica Artemisia campestris var. pacifica Artemisia campestris var. strutziae Artemisia pacifica Artemisia ripicola Oligosporus campestris ssp. pacificus Oligosporus pacificus Artemisia campestris ssp. caudata field sagewort Artemisia caudata Artemisia campestris var. caudata Artemisia caudata var. calvens Artemisia forwoodii Oligosporus caudatus Oligosporus campestris ssp. caudatus Artemisia cana silver sagebrush Artemisia cana ssp. viscidula silver sagebrush Artemisia argilosa Artemisia cana var. viscidula Seriphidium canum ssp. viscidulum Artemisia carruthii Carruth's sagewort Artemisia carruthii var. wrightii Artemisia kansana Artemisia dracunculus tarragon Artemisia dracunculoides Artemisia dracunculoides var. dracunculina Artemisia dracunculus ssp. glauca Artemisia dracunculus var. glauca Artemisia glauca Artemisia glauca var. dracunculina Oligosporus dracunculus Oligosporus dracunculus ssp. dracunculinus Oligosporus dracunculus ssp. glaucus Artemisia filifolia sand sagebrush Oligosporus filifolius Artemisia franserioides ragweed sagebrush Artemisia frigida prairie sagewort Artemisia lindleyana Columbia River wormwood Artemisia prescottiana Artemisia ludoviciana white sagebrush Artemisia ludoviciana ssp. albula white sagebrush Artemisia albula Artemisia ludoviciana var. albula Artemisia ludoviciana ssp. ludoviciana white sagebrush Artemisia diversifolia Artemisia gnaphalodes Artemisia herriotii Artemisia ludoviciana var. americana Artemisia ludoviciana var. brittonii Artemisia ludoviciana var. gnaphalodes Artemisia ludoviciana var. latifolia Artemisia ludoviciana var. pabularis Artemisia ludoviciana ssp. typica Artemisia pabularis Artemisia purshiana Artemisia vulgaris ssp. ludoviciana Artemisia vulgaris var. ludoviciana Artemisia ludoviciana ssp. mexicana white sagebrush Artemisia ludoviciana var. mexicana Artemisia mexicana Artemisia neomexicana Artemisia vulgaris var. mexicana Artemisia ludoviciana ssp. sulcata white sagebrush Artemisia sulcata Artemisia nova black sagebrush Artemisia arbuscula var. nova Artemisia arbuscula ssp. nova Artemisia nova var. duchesnicola Artemisia tridentata ssp. nova Seriphidium novum Artemisia pygmaea pygmy sagebrush Seriphidium pygmaeum Artemisia tridentata big sagebrush Artemisia tridentata ssp. tridentata basin big sagebrush Artemisia angusta Artemisia tridentata var. angustifolia Seriphidium tridentatum Artemisia tridentata ssp. wyomingensis Wyoming big sagebrush Artemisia tridentata var. wyomingensis Seriphidium tridentatum ssp. wyomingense Arundo giant reed Arundo donax giant reed Arundo donax var. versicolor Arundo versicolor Asanthus brickellbush Asanthus squamulosus Mule Mountain brickellbush Brickellia squamulosa Asclepias milkweed Asclepias albicans whitestem milkweed Asclepias angustifolia Arizona milkweed Asclepias asperula spider milkweed Asclepias asperula ssp. asperula spider milkweed Asclepias brachystephana bract milkweed Asclepias cryptoceras pallid milkweed Asclepias cryptoceras ssp. cryptoceras pallid milkweed Asclepias cutleri Cutler's milkweed Asclepias engelmanniana Engelmann's milkweed Acerates auriculata Asclepias auriculata Asclepias erosa desert milkweed Asclepias glaucescens nodding milkweed Asclepias elata Asclepias hallii Hall's milkweed Asclepias hypoleuca mahogany milkweed Asclepias involucrata dwarf milkweed Asclepias macrosperma Asclepias latifolia broadleaf milkweed Asclepias lemmonii Lemmon's milkweed Asclepias linaria pineneedle milkweed Asclepias macrotis longhood milkweed Asclepias nummularia tufted milkweed Asclepias nyctaginifolia Mojave milkweed Asclepias quinquedentata slimpod milkweed Asclepias rusbyi Rusby's milkweed Asclepias engelmanniana var. rusbyi Asclepias speciosa showy milkweed Asclepias giffordii Asclepias subulata rush milkweed Asclepias subverticillata horsetail milkweed Asclepias galioides Asclepias tuberosa butterfly milkweed Asclepias tuberosa ssp. interior butterfly milkweed Asclepias tuberosa var. interior Asclepias tuberosa ssp. terminalis Asclepias uncialis wheel milkweed Asclepias uncialis ssp. ruthiae Ruth's milkweed Asclepias eastwoodiana Asclepias ruthiae Asclepias sanjuanensis Asclepias uncialis var. ruthiae Asclepias uncialis ssp. uncialis wheel milkweed Asclepias verticillata whorled milkweed Asclepias viridiflora green comet milkweed Acerates viridiflora Acerates viridiflora var. ivesii Acerates viridiflora var. linearis Asclepias viridiflora var. lanceolata Asclepias viridiflora var. linearis Asclepias welshii Welsh's milkweed Asparagus asparagus Asparagus officinalis garden asparagus Aspicarpa asphead Aspicarpa hirtella chaparral asphead Asplenium spleenwort Asplenium adiantum-nigrum black spleenwort Asplenium andrewsii Asplenium dalhousiae Countess Dalhousie's spleenwort Ceterach dalhousiae Asplenium exiguum little spleenwort Asplenium fontanum Asplenium glenniei Asplenium monanthes singlesorus spleenwort Asplenium palmeri Palmer's spleenwort Asplenium platyneuron ebony spleenwort Asplenium platyneuron var. platyneuron ebony spleenwort Asplenium platyneuron var. incisum Asplenium resiliens blackstem spleenwort Asplenium septentrionale forked spleenwort Asplenium trichomanes maidenhair spleenwort Asplenium trichomanes ssp. trichomanes maidenhair spleenwort Astragalus milkvetch Astragalus acutirostris sharpkeel milkvetch Astragalus albulus cibola milkvetch Astragalus allochrous halfmoon milkvetch Astragalus allochrous var. allochrous halfmoon milkvetch Astragalus allochrous var. playanus halfmoon milkvetch Astragalus wootonii Astragalus wootonii var. typicus Astragalus amphioxys Crescent milkvetch Astragalus amphioxys var. amphioxys Crescent milkvetch Astragalus amphioxys var. melanocalyx Astragalus amphioxys var. modestus Crescent milkvetch Astragalus amphioxys var. musimonum Crescent milkvetch Astragalus musimonum Astragalus amphioxys var. vespertinus Aladdin's slippers Astragalus ampullarius gumbo milkvetch Astragalus argophyllus silverleaf milkvetch Astragalus argophyllus var. martinii silverleaf milkvetch Astragalus argophyllus var. pephragmenoides Astragalus argophyllus var. panguicensis silverleaf milkvetch Astragalus panguicensis Astragalus argophyllus var. stocksii silverleaf milkvetch Astragalus henrimontanensis Astragalus stocksii Astragalus aridus annual desert milkvetch Astragalus arizonicus Arizona milkvetch Astragalus beathii Beath's milkvetch Astragalus bisulcatus twogrooved milkvetch Astragalus bisulcatus var. bisulcatus twogrooved milkvetch Astragalus diholcos Diholcos bisulcatus Astragalus bisulcatus var. haydenianus Hayden's milkvetch Astragalus bisulcatus ssp. haydenianus Astragalus haydenianus Astragalus bisulcatus var. major twogrooved milkvetch Astragalus haylenianus var. major Astragalus brandegeei Brandegee's milkvetch Astragalus calycosus Torrey's milkvetch Astragalus calycosus var. calycosus Torrey's milkvetch Astragalus calycosus var. mancus Astragalus calycosus var. scaposus Torrey's milkvetch Astragalus castaneiformis chestnut milkvetch Astragalus castaneiformis var. typicus Astragalus ceramicus painted milkvetch Astragalus ceramicus var. ceramicus painted milkvetch Astragalus ceramicus var. filifolius painted milkvetch Astragalus longifolius Phaca longifolia Astragalus chuskanus San Juan milkvetch Astragalus cobrensis copper mine milkvetch Astragalus cobrensis var. cobrensis copper mine milkvetch Astragalus cobrensis var. maguirei Maguire's milkvetch Astragalus coccineus scarlet milkvetch Astragalus coltonii Colton's milkvetch Astragalus coltonii var. moabensis Moab milkvetch Astragalus canovirens Astragalus crassicarpus groundplum milkvetch Astragalus crassicarpus var. cavus groundplum milkvetch Astragalus cremnophylax sentry milkvetch Astragalus cremnophylax var. cremnophylax sentry milkvetch Astragalus cremnophylax var. hevronii sentry milkvetch Astragalus cremnophylax var. myriorrhaphis sentry milkvetch Astragalus crotalariae Salton milkvetch Astragalus desperatus rimrock milkvetch Astragalus desperatus var. conspectus rimrock milkvetch Astragalus barnebyi Astragalus desperatus var. desperatus rimrock milkvetch Astragalus didymocarpus dwarf white milkvetch Astragalus didymocarpus var. dispermus dwarf white milkvetch Astragalus dispermus Astragalus egglestonii Eggleston's milkvetch Astragalus emoryanus Emory's milkvetch Astragalus emoryanus var. emoryanus Emory's milkvetch Astragalus endopterus sandbar milkvetch Astragalus wootonii var. endopterus Astragalus ensiformis pagumpa milkvetch Astragalus ensiformis var. ensiformis pagumpa milkvetch Astragalus episcopus bishop's milkvetch Astragalus episcopus var. episcopus bishop's milkvetch Astragalus kaibensis Astragalus episcopus var. lancearius bishop's milkvetch Astragalus lancearius Astragalus eremiticus hermit milkvetch Astragalus eremiticus var. ampullarioides Astragalus eremiticus var. malheurensis Astragalus eremiticus var. spencianus Astragalus malheurensis Astragalus eurylobus Needle Mountain milkvetch Astragalus tephrodes var. eurylobus Astragalus flavus yellow milkvetch Astragalus confertiflorus Astragalus confertiflorus var. flaviflorus Astragalus flavus var. argillosus Astragalus flavus var. candicans Astragalus flexuosus flexile milkvetch Astragalus flexuosus var. diehlii Diehl's milkvetch Astragalus flexuosus var. greenei Greene's milkvetch Astragalus greenei Astragalus stictocarpus Astragalus fucatus Hopi milkvetch Astragalus geyeri Geyer's milkvetch Astragalus geyeri var. triquetrus Geyer's milkvetch Astragalus triquetrus Astragalus gilensis Gila milkvetch Astragalus hallii Hall's milkvetch Astragalus hallii var. fallax Hall's milkvetch Astragalus famelicus Astragalus hartwegii Hartweg's milkvetch Astragalus holmgreniorum Paradox milkvetch Astragalus humistratus groundcover milkvetch Astragalus humistratus var. crispulus groundcover milkvetch Astragalus humistratus var. hosackiae groundcover milkvetch Astragalus humistratus var. humistratus groundcover milkvetch Astragalus datilensis Astragalus humistratus var. humivagans groundcover milkvetch Astragalus humistratus var. sonorae groundcover milkvetch Astragalus humistratus var. tenerrimus groundcover milkvetch Astragalus hypoxylus Huachuca Mountain milkvetch Astragalus insularis Cedros milkvetch Astragalus insularis var. harwoodii Harwood's milkvetch Astragalus harwoodii Astragalus kentrophyta spiny milkvetch Astragalus kentrophyta var. coloradoensis Colorado spiny milkvetch Astragalus kentrophyta ssp. coloradoensis Astragalus kentrophyta var. elatus tall spiny milkvetch Astragalus impensis Astragalus kentrophyta ssp. elatus Astragalus layneae widow's milkvetch Astragalus lentiginosus freckled milkvetch Astragalus lentiginosus var. ambiguus freckled milkvetch Astragalus lentiginosus var. australis freckled milkvetch Astragalus lentiginosus var. borreganus Borrego milkvetch Astragalus agninus Astragalus arthu-schottii Astragalus coulteri Astragalus lentiginosus var. coulteri Astragalus lentiginosus var. diphysus freckled milkvetch Astragalus araneosus Astragalus diphysus Astragalus lentiginosus var. araneosus Astragalus lentiginosus var. albiflorus Astragalus lentiginosus var. mcdougallii Astragalus lentiginosus var. wahweapensis Astragalus lentiginosus var. maricopae Maricopa milkvetch Astragalus lentiginosus var. oropedii freckled milkvetch Astragalus lentiginosus var. palans freckled milkvetch Astragalus bryantii Astragalus lentiginosus var. ursinus Astragalus lentiginosus var. stramineus freckled milkvetch Astragalus lentiginosus var. vitreus freckled milkvetch Astragalus lentiginosus var. wilsonii Wilson's milkvetch Astragalus lentiginosus var. yuccanus yucca milkvetch Astragalus lonchocarpus rushy milkvetch Astragalus miser timber milkvetch Astragalus miser var. oblongifolius timber milkvetch Astragalus decumbens var. oblongifolius Astragalus moencoppensis Moenkopi milkvetch Astragalus mokiacensis Mokiak milkvetch Astragalus lentiginosus var. mokiacensis Astragalus mollissimus woolly locoweed Astragalus mollissimus var. bigelovii woolly locoweed Astragalus bigelovii Astragalus bigelovii var. typicus Astragalus mollissimus var. mogollonicus woolly locoweed Astragalus bigelovii var. mogollonicus Astragalus mollissimus var. thompsoniae woolly locoweed Astragalus bigelovii var. thompsoniae Astragalus thompsoniae Astragalus monumentalis Monument Valley milkvetch Astragalus monumentalis var. cottamii Cottam's milkvetch Astragalus cottamii Astragalus monumentalis var. monumentalis Monument Valley milkvetch Astragalus musiniensis Ferron's milkvetch Astragalus newberryi Newberry's milkvetch Astragalus newberryi var. aquarii Newberry's milkvetch Astragalus newberryi var. blyae Newberry's milkvetch Astragalus blyae Astragalus newberryi var. newberryi Newberry's milkvetch Astragalus nothoxys sheep milkvetch Astragalus nutriosensis Apache milkvetch Astragalus nuttallianus smallflowered milkvetch Astragalus nuttallianus var. austrinus smallflowered milkvetch Astragalus austrinus Astragalus nuttallianus var. imperfectus turkeypeas Astragalus nuttallianus var. micranthiformis turkeypeas Astragalus nuttallianus var. trichocarpus turkeypeas Astragalus oocalycis Arboles milkvetch Astragalus oophorus egg milkvetch Astragalus oophorus var. caulescens egg milkvetch Astragalus palmeri Palmer's milkvetch Astragalus vaseyi Astragalus vaseyi var. johnstonii Astragalus vaseyi var. metanus Astragalus pattersonii Patterson's milkvetch Astragalus pinonis pinyon milkvetch Astragalus pinonis var. atwoodii Duane's milkvetch Astragalus atwoodii Astragalus pinonis var. pinonis pinyon milkvetch Astragalus praelongus stinking milkvetch Astragalus praelongus var. lonchopus stinking milkvetch Astragalus praelongus var. praelongus stinking milkvetch Astragalus pattersonii var. praelongus Astragalus recedens Astragalus preussii Preuss' milkvetch Astragalus preussii var. laxiflorus Preuss' milkvetch Astragalus crotalariae var. davidsonii Astragalus preussii var. preussii Preuss' milkvetch Astragalus preussii var. latus Astragalus recurvus recurved milkvetch Astragalus rusbyi Rusby's milkvetch Astragalus sabulonum gravel milkvetch Astragalus scopulorum Rocky Mountain milkvetch Astragalus sesquiflorus sandstone milkvetch Astragalus sesquiflorus var. brevipes Astragalus sophoroides painted desert milkvetch Astragalus straturensis Pine Valley milkvetch Astragalus striatiflorus escarpment milkvetch Astragalus subcinereus Silver's milkvetch Astragalus silerianus Astragalus silerianus var. cariacus Astragalus subcinereus var. basalticus Astragalus tephrodes ashen milkvetch Astragalus tephrodes var. brachylobus ashen milkvetch Astragalus arrectus var. pephragmenus Astragalus tephrodes var. chloridae ashen milkvetch Astragalus tephrodes var. tephrodes ashen milkvetch Astragalus tephrodes var. typicus Astragalus tetrapterus fourwing milkvetch Astragalus cinerascens Astragalus tetrapterus var. capricornus Astragalus tetrapterus var. cinerascens Astragalus thurberi Thurber's milkvetch Astragalus titanophilus limestone milkvetch Astragalus convallarius var. foliolatus Astragalus toanus Toano milkvetch Astragalus toanus var. scidulus Toano milkvetch Astragalus troglodytus creeping milkvetch Astragalus vaccarum Cow Spring milkvetch Astragalus wingatanus Fort Wingate milkvetch Astragalus xiphoides gladiator milkvetch Astragalus convallarius var. xiphoides Astragalus zionis Zion milkvetch Astragalus zionis var. zionis Zion milkvetch Astrolepis cloakfern Astrolepis cochisensis Cochise scaly cloakfern Astrolepis cochisensis ssp. arizonica Arizona scaly cloakfern Astrolepis cochisensis ssp. cochisensis Cochise scaly cloakfern Cheilanthes cochisensis Cheilanthes sinuata var. cochisensis Notholaena cochisensis Notholaena sinuata var. cochisensis Astrolepis integerrima hybrid cloakfern Cheilanthes integerrima Notholaena integerrima Notholaena sinuata var. integerrima Astrolepis sinuata wavy scaly cloakfern Astrolepis sinuata ssp. sinuata wavy scaly cloakfern Cheilanthes sinuata Notholaena sinuata Astrolepis windhamii Windham's scaly cloakfern Atamisquea atamisquea Atamisquea emarginata vomitbush Capparis atamisquea Capparis emarginata nec Athyrium ladyfern Athyrium filix-femina common ladyfern Athyrium filix-femina ssp. cyclosorum subarctic ladyfern Athyrium alpestre var. cyclosorum Athyrium angustum var. boreale Athyrium angustum var. elatius Athyrium filix-femina var. cyclosorum Athyrium filix-femina var. californicum Athyrium filix-femina var. sitchense Athysanus sandweed Athysanus pusillus common sandweed Athysanus pusillus var. glabrior Thysanocarpus pusillus Atrichoseris atrichoseris Atrichoseris platyphylla parachute plant Malacothrix platyphylla Atriplex saltbush Atriplex acanthocarpa tubercled saltbush Atriplex acanthocarpa ssp. acanthocarpa tubercled saltbush Obione acanthocarpa Atriplex argentea silverscale saltbush Atriplex argentea ssp. argentea silverscale saltbush Atriplex argentea ssp. argentea var. argentea silverscale saltbush Atriplex argentea ssp. typica Atriplex argentea ssp. argentea var. caput-medusae stalked saltbush Atriplex saccaria var. caput-medusae Atriplex argentea ssp. expansa silverscale saltbush Atriplex argentea var. mohavensis Atriplex expansa Atriplex expansa var. mohavensis Atriplex asterocarpa Chinle saltbush Atriplex canescens fourwing saltbush Atriplex canescens var. angustifolia fourwing saltbush Atriplex canescens var. canescens fourwing saltbush Atriplex canescens var. occidentalis Atriplex tetraptera Atriplex canescens var. linearis thinleaf fourwing saltbush Atriplex canescens ssp. linearis Atriplex linearis Atriplex confertifolia shadscale saltbush Atriplex collina Atriplex jonesii Atriplex subconferta Atriplex cuneata valley saltbush Atriplex cuneata ssp. cuneata valley saltbush Atriplex acanthocarpa var. cuneata Atriplex gardneri var. cuneata Atriplex nuttallii ssp. cuneata Atriplex elegans wheelscale saltbush Atriplex elegans var. elegans wheelscale saltbush Atriplex elegans var. fasciculata wheelscale saltbush Atriplex elegans ssp. fasciculata Atriplex fasciculata Atriplex elegans var. thornberi wheelscale saltbush Atriplex garrettii Garrett's saltbush Atriplex canescens ssp. garrettii Atriplex canescens var. garrettii Atriplex griffithsii Griffiths' saltbush Atriplex lentiformis var. griffithsii Atriplex torreyi var. griffithsii Atriplex hymenelytra desertholly Atriplex lentiformis big saltbush Atriplex lentiformis ssp. lentiformis big saltbush Atriplex navajoensis Navajo saltbush Atriplex garrettii var. navajoensis Atriplex obovata mound saltbush Atriplex pacifica Davidson's saltbush Atriplex phyllostegia leafcover saltweed Atriplex phyllostegia var. draconis Atriplex polycarpa cattle saltbush Atriplex powellii Powell's saltweed Atriplex prostrata triangle orache Atriplex hastata Atriplex latifolia Atriplex patula var. hastata Atriplex patula ssp. hastata 1923 Atriplex patula var. triangularis Atriplex prostrata var. triangularis Atriplex triangularis Atriplex rosea tumbling saltweed Atriplex saccaria sack saltbush Atriplex semibaccata Australian saltbush Atriplex subspicata saline saltbush Atriplex patula ssp. hastata Atriplex patula ssp. subspicata Atriplex patula var. subspicata Atriplex torreyi Torrey's saltbush Atriplex lentiformis var. torreyi Atriplex lentiformis ssp. torreyi Atriplex wrightii Wright's saltbush Avena oat Avena barbata slender oat Avena hirsuta Avena fatua wild oat Avena fatua var. glabrata Avena fatua var. vilis Avena hybrida Avena sativa common oat Avena byzantina Avena fatua var. sativa Avena hybrida Avena sativa var. orientalis Ayenia ayenia Ayenia ardua wingstem ayenia Ayenia compacta California ayenia Ayenia californica Ayenia filiformis TransPecos ayenia Ayenia glabra smooth ayenia Ayenia insulicola dwarf ayenia Ayenia pusilla Ayenia microphylla dense ayenia Azolla mosquitofern Azolla filiculoides Pacific mosquitofern Azolla mexicana Mexican mosquitofern Baccharis baccharis Baccharis bigelovii Bigelow's false willow Baccharis brachyphylla shortleaf baccharis Baccharis emoryi Emory's baccharis Baccharis neglecta Rooseveltweed Baccharis pteronioides yerba de pasmo Baccharis salicifolia mule's fat Baccharis glutinosa Baccharis viminea Molina salicifolia Baccharis sarothroides desertbroom Baccharis sergiloides squaw waterweed baccharis Baccharis thesioides Arizona baccharis Baccharis wrightii Wright's baccharis Bacopa waterhyssop Bacopa monnieri herb of grace Bramia monnieri Lysimachia monnieri Bacopa rotundifolia disk waterhyssop Bacopa nobsiana Bacopa simulans Bramia rotundifolia Hydranthelium rotundifolium Macuillamia rotundifolia Bahia bahia Bahia absinthifolia hairyseed bahia Bahia absinthifolia var. absinthifolia hairyseed bahia Bahia absinthifolia var. dealbata Dealbata's bahia Bahia biternata slimlobe bahia Bahia dissecta ragleaf bahia Amauria ?dissecta Baileya desert marigold Baileya multiradiata desert marigold Baileya multiradiata var. thurberi Baileya pauciradiata laxflower Baileya pleniradiata woolly desert marigold Baileya multiradiata var. pleniradiata Baileya perennis Balsamorhiza balsamroot Balsamorhiza hookeri Hooker's balsamroot Balsamorhiza hookeri var. hispidula hairy balsamroot Balsamorhiza hispidula Balsamorhiza sagittata arrowleaf balsamroot Barbarea yellowrocket Barbarea orthoceras American yellowrocket Barbarea americana Barbarea orthoceras var. dolichocarpa Barkleyanthus willow ragwort Barkleyanthus salicifolius willow ragwort Cineraria salicifolia Senecio salignus Bassia smotherweed Bassia hyssopifolia fivehorn smotherweed Echinopsilon hyssopifolius Kochia hyssopifolia Bebbia sweetbush Bebbia juncea sweetbush Bebbia juncea var. aspera sweetbush Beckmannia sloughgrass Beckmannia syzigachne American sloughgrass Beckmannia eruciformis Beckmannia eruciformis ssp. baicalensis Beckmannia eruciformis var. uniflora Beckmannia syzigachne ssp. baicalensis Beckmannia syzigachne var. uniflora Berberis barberry Berberis harrisoniana Harrison's barberry Berberis wilcoxii Wilcox's barberry Odostemon wilcoxii Berlandiera greeneyes Berlandiera lyrata lyreleaf greeneyes Berlandiera lyrata var. macrophylla Bernardia myrtlecroton Bernardia incana hoary myrtlecroton Berula waterparsnip Berula erecta cutleaf waterparsnip Berula erecta var. incisa Berula incisa Berula pusilla Siella erecta Besseya kittentail Besseya arizonica Arizona coraldrops Besseya plantaginea White River coraldrops Betula birch Betula occidentalis water birch Betula beeniana Betula fontinalis Betula occidentalis var. inopina Betula papyrifera ssp. occidentalis Betula papyrifera var. occidentalis Bidens beggarticks Bidens aurea Arizona beggarticks Bidens aurea var. wrightii Bidens heterophylla Coreopsis aurea Bidens bigelovii Bigelow's beggarticks Bidens bipinnata Spanish needles Bidens bipinnata var. biternatoides Bidens cernua nodding beggartick Bidens cernua var. dentata Bidens cernua var. elliptica Bidens cernua var. integra Bidens cernua var. minima Bidens cernua var. oligodonta Bidens cernua var. radiata Bidens glaucescens Bidens ferulifolia Apache beggarticks Coreopsis ferulifolia Bidens frondosa devil's beggartick Bidens frondosa var. anomala Bidens frondosa var. caudata Bidens frondosa var. pallida Bidens frondosa var. stenodonta Bidens heterosperma Rocky Mountain beggarticks Bidens laevis smooth beggartick Bidens elegans Bidens nashii Helianthus laevis Bidens lemmonii Lemmon's beggarticks Bidens leptocephala fewflower beggarticks Bidens pilosa hairy beggarticks Bidens odorata Bidens pilosa var. bimucronata Bidens pilosa var. minor Bidens tenuisecta slimlobe beggarticks Blepharoneuron dropseed Blepharoneuron tricholepis pine dropseed Vilfa tricholepis Boehmeria false nettle Boehmeria cylindrica smallspike false nettle Boehmeria austrina Boehmeria cylindrica var. drummondiana Boehmeria cylindrica var. scabra Boehmeria decurrens Boehmeria drummondiana Boehmeria scabra Urtica cylindrica Boerhavia spiderling Boerhavia coccinea scarlet spiderling Boerhavia coulteri Coulter's spiderling Senkenbergia coulteri Boerhavia erecta erect spiderling Boerhavia gracillima slimstalk spiderling Boerhavia intermedia fivewing spiderling Boerhavia erecta var. intermedia Boerhavia megaptera Tucson Mountain spiderling Boerhavia pterocarpa Apache Pass spiderling Boerhavia purpurascens purple spiderling Boerhavia scandens climbing wartclub Commicarpus scandens Boerhavia spicata creeping spiderling Boerhavia torreyana Boerhavia triquetra slender spiderling Boerhavia wrightii largebract spiderling Bommeria bommeria fern Bommeria hispida copper fern Gymnopteris hispida Bothriochloa beardgrass Bothriochloa barbinodis cane bluestem Andropogon barbinodis Andropogon perforatus Bothriochloa barbinodis var. perforata Bothriochloa barbinodis var. palmeri Bothriochloa palmeri Bothriochloa ischaemum yellow bluestem Dichanthium ischaemum Bothriochloa ischaemum var. songarica yellow bluestem Andropogon ischaemum var. songaricus Bothriochloa laguroides silver beardgrass Bothriochloa laguroides ssp. torreyana silver beardgrass Andropogon saccharoides var. torreyanus Bothriochloa saccharoides var. torreyana Bothriochloa springfieldii Springfield's beardgrass Andropogon springfieldii Bothriochloa wrightii Wright's beardgrass Andropogon wrightii Botrychium grapefern Botrychium crenulatum scalloped moonwort Botrychium dusenii Botrychium echo reflected grapefern Botrychium hesperium western moonwort Botrychium lunaria ssp. occidentale Botrychium matricariifolium ssp. hesperium Botrychium matricariifolium var. hesperium Botrychium lanceolatum lanceleaf grapefern Botrychium lanceolatum var. lanceolatum lanceleaf grapefern Botrychium lanceolatum ssp. typicum Botrychium lunaria common moonwort Botrychium lunaria var. onondagense Botrychium onondagense Botrychium minganense Mingan moonwort Botrychium lunaria var. minganense Botrychium lunaria ssp. minganense Botrychium multifidum leathery grapefern Botrychium californicum Botrychium coulteri Botrychium matricariae Botrychium multifidum var. coulteri Botrychium multifidum var. californicum Botrychium multifidum ssp. coulteri Botrychium multifidum ssp. californicum Botrychium multifidum var. intermedium Botrychium multifidum ssp. silaifolium Botrychium multifidum var. silaifolium Botrychium silaifolium Botrychium silaifolium var. coulteri Botrychium pinnatum northern moonwort Botrychium boreale var. obtusilobum Botrychium boreale ssp. obtusilobum Botrychium virginianum rattlesnake fern Botrychium virginianum ssp. europaeum Botrychium virginianum var. europaeum Bouchea bouchea Bouchea prismatica prism bouchea Bouchea prismatica var. brevirostra Bouchea prismatica var. longirostra Bouteloua grama Bouteloua aristidoides needle grama Bouteloua aristidoides var. aristidoides needle grama Bouteloua aristidoides var. arizonica Arizona needle grama Bouteloua barbata sixweeks grama Bouteloua arenosa Chondrosum barbata Chondrosum exile Chondrosum microstachyum Chondrosum polystachyum Chondrosum subscorpioides Bouteloua chondrosioides sprucetop grama Chondrosum humboldtianum Dinebra chondrosioides Bouteloua curtipendula sideoats grama Bouteloua curtipendula var. caespitosa sideoats grama Bouteloua curtipendula var. curtipendula sideoats grama Atheropogon curtipendulus Chloris curtipendula Bouteloua eludens Santa Rita Mountain grama Bouteloua eriopoda black grama Chondrosum eriopodum Bouteloua gracilis blue grama Bouteloua gracilis var. stricta Bouteloua oligostachya Chondrosum gracile Chondrosum oligostachyum Bouteloua hirsuta hairy grama Bouteloua hirsuta var. hirsuta hairy grama Bouteloua glandulosa Bouteloua hirsuta var. glandulosa Chondrosum hirsutum Bouteloua parryi Parry's grama Chondrosum parryi Bouteloua radicosa purple grama Atheropogon radicosus Bouteloua repens slender grama Bouteloua filiformis Bouteloua heterostega Dinebra repens Bouteloua rothrockii Rothrock's grama Bouteloua barbata var. rothrockii Bouteloua simplex matted grama Chondrosum procumbens Chondrosum prostratum Bouteloua trifida red grama Bouteloua trifida var. trifida red grama Bouvardia bouvardia Bouvardia ternifolia firecrackerbush Bouvardia glaberrima Bowlesia bowlesia Bowlesia incana hoary bowlesia Bowlesia septentrionalis Brachystigma desert foxglove Brachystigma wrightii Arizona desert foxglove Brandegea starvine Brandegea bigelovii desert starvine Brassica mustard Brassica juncea India mustard Brassica integrifolia Brassica integrifolia Brassica japonica Brassica juncea var. crispifolia Brassica juncea var. japonica Brassica willdenowii Sinapis juncea Brassica nigra black mustard Sinapis nigra Brassica rapa field mustard Brassica rapa var. rapa field mustard Brassica campestris Brassica campestris var. rapa Brassica campestris ssp. rapifera Brassica rapa ssp. campestris Brassica rapa var. campestris Brassica rapa ssp. olifera Brassica rapa ssp. sylvestris Caulanthus sulfureus Brassica tournefortii Asian mustard Brassica tournefortii var. sisymbrioides Brickellia brickellbush Brickellia amplexicaulis earleaf brickellbush Brickellia amplexicaulis var. amplexicaulis earleaf brickellbush Brickellia amplexicaulis var. lanceolata earleaf brickellbush Brickellia atractyloides spearleaf brickellbush Brickellia baccharidea resinleaf brickellbush Brickellia betonicifolia betonyleaf brickellbush Brickellia brachyphylla plumed brickellbush Brickellia brachyphylla var. brachyphylla plumed brickellbush Brickellia californica California brickellbush Brickellia californica var. californica California brickellbush Bulbostylis californica Brickellia coulteri Coulter's brickellbush Brickellia desertorum desert brickellbush Brickellia californica var. desertorum Coleosanthus desertorum Brickellia eupatorioides false boneset Brickellia eupatorioides var. chlorolepis false boneset Brickellia chlorolepis Brickellia leptophylla var. mexicana Brickellia rosemarinifolia var. chlorolepis Brickellia shaffneri Kuhnia chlorolepis Kuhnia eupatorioides var. chlorolepis Kuhnia leptophylla var. mexicana Kuhnia microphylla Kuhnia rosemarinifolia var. chlorolepis Kuhnia shaffneri Brickellia floribunda Chihuahuan brickellbush Brickellia frutescens shrubby brickellbush Brickellia grandiflora tasselflower brickellbush Brickellia grandiflora var. petiolaris Coleosanthus grandiflorus Brickellia incana woolly brickellbush Brickellia lemmonii Lemmon's brickellbush Brickellia lemmonii var. lemmonii Lemmon's brickellbush Brickellia longifolia longleaf brickellbush Brickellia longifolia var. longifolia longleaf brickellbush Brickellia microphylla littleleaf brickellbush Brickellia microphylla var. scabra rough brickellbush Brickellia microphylla ssp. scabra Brickellia scabra Brickellia microphylla var. watsonii Watson's brickellbush Brickellia watsonii Brickellia oblongifolia Mojave brickellbush Brickellia oblongifolia var. linifolia narrowleaf brickellbush Brickellia linifolia Brickellia parvula Mt. brickellbush Brickellia pringlei Pringle's brickellbush Brickellia rusbyi stinking brickellbush Brickellia simplex Sonoran brickellbush Brickellia venosa veiny brickellbush Coleosanthus venosus Brickelliastrum brickellbush Brickelliastrum fendleri Fendler's brickellbush Brickellia fendleri Eupatorium fendleri Bromus brome Bromus arenarius Australian brome Bromus arizonicus Arizona brome Bromus arvensis field brome Bromus berterianus Chilean chess Bromus trinii Bromus trinii var. excelsus Trisetobromus hirtus Bromus catharticus rescuegrass Bromus brevis Bromus haenkeanus Bromus unioloides Bromus willdenowii Ceratochloa cathartica Ceratochloa unioloides Ceratochloa willdenowii Festuca unioloides Bromus ciliatus fringed brome Bromus ciliatus var. ciliatus fringed brome Bromopsis canadensis Bromus canadensis Bromopsis ciliata Bromus ciliatus var. genuinus Bromus ciliatus var. intonsus Bromus dudleyi Bromus richardsonii var. pallidus Bromus ciliatus var. richardsonii fringed brome Bromopsis canadensis ssp. richardsonii Bromus richardsonii Bromopsis richardsonii Bromus commutatus meadow brome Bromus commutatus var. apricorum Bromus diandrus ripgut brome Anisantha diandra Bromus gussonei Bromus rigidus var. gussonei Bromus frondosus weeping brome Bromopsis frondosa Bromus hordeaceus soft brome Bromus hordeaceus ssp. hordeaceus soft brome Bromus mollis Bromus inermis smooth brome Bromus inermis ssp. inermis smooth brome Bromus inermis ssp. inermis var. inermis smooth brome Bromopsis inermis Bromus japonicus Japanese brome Bromus japonicus var. porrectus Bromus patulus Bromus lanatipes woolly brome Bromus anomalus var. lanatipes Bromopsis lanatipes Bromus porteri var. lanatipes Bromus madritensis compact brome Anisantha madritensis Bromus marginatus mountain brome Bromus breviaristatus Bromus carinatus var. linearis Bromus marginatus var. breviaristatus Bromus marginatus var. latior Bromus marginatus var. seminudus Bromus sitchensis var. marginatus Ceratochloa marginata Ceratochloa marginata Bromus mucroglumis sharpglume brome Bromopsis mucroglumis Bromus polyanthus Great Basin brome Bromus polyanthus var. paniculatus Great Basin brome Bromus paniculatus Bromus polyanthus var. polyanthus Great Basin brome Ceratochloa polyantha Bromus porteri Porter brome Bromus anomalus Bromopsis porteri Bromus racemosus bald brome Bromus rubens red brome Anisantha rubens Bromus madritensis ssp. rubens Bromus secalinus rye brome Bromus secalinus var. hirsutus Bromus secalinus var. hirtus Bromus sterilis poverty brome Anisantha sterilis Bromus tectorum cheatgrass Anisantha tectorum Bromus tectorum var. glabratus Bromus tectorum var. hirsutus Bromus tectorum var. nudus Browallia browallia Browallia eludens bush-violet Buchloe buffalograss Buchloe dactyloides buffalograss Bulbilis dactyloides Sesleria dactyloides Buchnera bluehearts Buchnera arizonica Arizona bluehearts Buddleja butterflybush Buddleja scordioides escobilla butterflybush Buddleja sessiliflora Rio Grande butterflybush Buddleja utahensis Utah butterflybush Bulbostylis hairsedge Bulbostylis capillaris densetuft hairsedge Bulbostylis capillaris ssp. capillaris densetuft hairsedge Bulbostylis capillaris var. crebra Bulbostylis capillaris var. isopoda Fimbristylis capillaris Scirpus capillaris Stenophyllus capillaris Bulbostylis funckii Funck's hairsedge Isolepis funckii Bulbostylis juncoides rush hairsedge Bulbostylis fendleri Bulbostylis juncoides var. ampliceps Fimbristylis juncoides Bupleurum bupleurum Bupleurum lancifolium lanceleaf thorow wax Bupleurum protractum Bupleurum subovatum Bupleurum rotundifolium hare's ear Bursera bursera Bursera fagaroides fragrant bursera Bursera fagaroides var. elongata fragrant bursera Bursera odorata Bursera microphylla elephant tree Caesalpinia nicker Caesalpinia drepanocarpa sicklepod holdback Hoffmannseggia drepanocarpa Caesalpinia gilliesii bird-of-paradise shrub Poinciana gilliesii Caesalpinia jamesii James' holdback Hoffmannseggia jamesii Caesalpinia virgata wand holdback Hoffmannseggia microphylla Calamagrostis reedgrass Calamagrostis canadensis bluejoint Calamagrostis canadensis var. canadensis bluejoint Calamagrostis anomala Calamagrostis atropurpurea Calamagrostis canadensis var. pallida Calamagrostis canadensis var. robusta Calamagrostis canadensis var. typica Calamagrostis expansa var. robusta Calamagrostis inexpansa var. cuprea Calamagrostis inexpansa var. robusta Calamagrostis scribneri Calamagrostis scopulorum ditch reedgrass Calamagrostis scopulorum var. bakeri Calamagrostis stricta slimstem reedgrass Calamagrostis stricta ssp. inexpansa northern reedgrass Calamagrostis californica Calamagrostis canadensis var. arcta Calamagrostis canadensis var. acuminata Calamagrostis chordorrhiza Calamagrostis crassiglumis Calamagrostis expansa Calamagrostis fernaldii Calamagrostis hyperborea var. americana Calamagrostis hyperborea var. elongata Calamagrostis hyperborea var. stenodes Calamagrostis inexpansa Calamagrostis inexpansa var. barbulata Calamagrostis inexpansa var. brevior Calamagrostis inexpansa var. novae-angliae Calamagrostis labradorica Calamagrostis lacustris Calamagrostis lapponica var. brevipilis Calamagrostis pickeringii var. lacustris Calamagrostis robertii Calamagrostis stricta var. brevior Calamagrostis stricta var. lacustris Calamagrostis stricta ssp. stricta slimstem reedgrass Calamagrostis neglecta Calamagrostis neglecta var. gracilis Calamagrostis neglecta var. micrantha Calamagrostis neglecta ssp. stricta Calamovilfa sandreed Calamovilfa gigantea giant sandreed Calamagrostis gigantea Calandrinia redmaids Calandrinia ciliata fringed redmaids Calandrinia ciliata var. menziesii Calibrachoa calibrachoa Calibrachoa parviflora seaside petunia Petunia parviflora Callaeum callaeum Callaeum ?macropterum hillyhock Calliandra stickpea Calliandra eriophylla fairyduster Calliandra eriophylla var. eriophylla fairyduster Calliandra humilis dwarf stickpea Calliandra humilis var. humilis dwarf stickpea Calliandra herbacea Calliandra humilis var. reticulata dwarf stickpea Calliandra reticulata Calliandra schottii Schott's stickpea Callirhoe poppymallow Callirhoe involucrata purple poppymallow Callirhoe involucrata var. involucrata purple poppymallow Callirhoe involucrata var. novomexicana Callitriche water-starwort Callitriche hermaphroditica northern water-starwort Callitriche autumnalis Callitriche heterophylla twoheaded water-starwort Callitriche heterophylla ssp. heterophylla twoheaded water-starwort Callitriche anceps Callitriche palustris vernal water-starwort Callitriche palustris var. verna Callitriche verna Calochortus mariposa lily Calochortus ambiguus doubting mariposa lily Calochortus watsonii var. ambiguus Calochortus aureus golden mariposa lily Calochortus nuttallii var. aureus Calochortus flexuosus winding mariposa lily Calochortus gunnisonii Gunnison's mariposa lily Calochortus gunnisonii var. gunnisonii Gunnison's mariposa lily Calochortus kennedyi desert mariposa lily Calochortus kennedyi var. kennedyi desert mariposa lily Calochortus nuttallii sego lily Caltha marsh marigold Caltha leptosepala white marsh marigold Caltha leptosepala ssp. leptosepala white marsh marigold Caltha leptosepala ssp. leptosepala var. leptosepala white marsh marigold Caltha biflora var. rotundifolia Caltha chelidonii Caltha leptosepala var. rotundifolia Psychrophila leptosepala Calycoseris tackstem Calycoseris parryi yellow tackstem Calycoseris wrightii white tackstem Calylophus sundrops Calylophus hartwegii Hartweg's sundrops Calylophus hartwegii ssp. fendleri Hartweg's sundrops Oenothera fendleri Oenothera hartwegii var. fendleri Calylophus hartwegii ssp. pubescens Hartweg's sundrops Calylophus hartwegii var. pubescens Galpinsia camporum Galpinsia interior Oenothera greggii Oenothera greggii var. lampasana Oenothera greggii var. pubescens Calylophus lavandulifolius lavenderleaf sundrops Calylophus hartwegii ssp. lavandulifolius Calylophus hartwegii var. lavandulifolius Galpinsia lavandulifolia Oenothera lavandulifolia Oenothera lavandulifolia var. glandulosa Oenothera lavandulifolia var. typica Calylophus serrulatus yellow sundrops Calylophus australis Meriolix intermedia Meriolix oblanceolata Meriolix serrulata Oenothera serrulata Oenothera serrulata var. typica Calylophus toumeyi Toumey's sundrops Calylophus hartwegii ssp. toumeyi Galpinsia toumeyi Oenothera hartwegii var. toumeyi Oenothera toumeyi Calypso fairy slipper Calypso bulbosa fairy slipper Calypso bulbosa var. americana fairy slipper Cytherea bulbosa Calystegia false bindweed Calystegia longipes Paiute false bindweed Convolvulus linearilobus Convolvulus longipes Calystegia macounii Macoun's false bindweed Convolvulus interior Calystegia sepium hedge false bindweed Calystegia sepium ssp. angulata hedge false bindweed Calystegia sepium var. angulata Calystegia sepium var. repens Convolvulus repens Convolvulus sepium var. repens Camelina false flax Camelina microcarpa littlepod false flax Camelina sativa ssp. microcarpa Camelina sativa gold-of-pleasure Camelina sativa ssp. sativa gold-of-pleasure Camelina parodii Myagrum sativum Camissonia suncup Camissonia arenaria Fortuna Range suncup Chylismia arenaria Oenothera arenaria Oenothera cardiophylla var. splendens Camissonia boothii Booth's evening-primrose Camissonia boothii ssp. alyssoides alyssum evening-primrose Camissonia boothii var. alyssoides Camissonia boothii var. villosa Oenothera alyssoides Oenothera alyssoides var. villosa Oenothera boothii ssp. alyssoides Camissonia boothii ssp. boothii Booth's suncup Oenothera boothii Camissonia boothii ssp. condensata shredding suncup Camissonia boothii var. condensata Oenothera boothii ssp. condensata Oenothera decorticans var. condensata Camissonia boothii ssp. decorticans shredding suncup Camissonia boothii var. decorticans Camissonia boothii ssp. rutila Gaura decorticans Oenothera boothii ssp. decorticans Oenothera boothii ssp. rutila Oenothera decorticans Oenothera decorticans var. rutila Camissonia brevipes yellow cups Camissonia brevipes ssp. arizonica golden suncup Oenothera brevipes ssp. arizonica Camissonia brevipes ssp. brevipes golden suncup Oenothera brevipes Camissonia brevipes ssp. pallidula pallid suncup Oenothera brevipes ssp. pallidula Oenothera brevipes var. pallidula Oenothera pallidula Camissonia californica California suncup Eulobus californicus Oenothera californica Oenothera leptocarpa Camissonia cardiophylla heartleaf suncup Camissonia cardiophylla ssp. cardiophylla heartleaf suncup Oenothera cardiophylla Oenothera cardiophylla var. typica Camissonia chamaenerioides longcapsule suncup Oenothera chamaenerioides Camissonia claviformis browneyes Camissonia claviformis ssp. aurantiaca browneyes Camissonia claviformis var. aurantiaca Oenothera claviformis ssp. aurantiaca Oenothera claviformis var. aurantiaca Camissonia claviformis ssp. peeblesii Peebles' browneyes Oenothera claviformis var. peeblesii Oenothera claviformis ssp. peeblesii Camissonia claviformis ssp. peirsonii Peirson's browneyes Oenothera claviformis ssp. peirsonii Oenothera claviformis var. peirsonii Camissonia claviformis ssp. rubescens browneyes Oenothera claviformis ssp. rubescens Camissonia claviformis ssp. yumae Yuma browneyes Oenothera claviformis ssp. yumae Camissonia confertiflora Grand Canyon suncup Oenothera confertiflora Camissonia confusa San Bernardino suncup Camissonia eastwoodiae Grand Junction camissonia Oenothera eastwoodiae Oenothera scapoidea var. eastwoodiae Camissonia exilis Cottonwood Springs suncup Oenothera exilis Camissonia gouldii Diamond Valley suncup Oenothera gouldii Camissonia multijuga froststem suncup Oenothera multijuga Oenothera multijuga var. parviflora Oenothera multijuga var. typica Camissonia pallida paleyellow suncup Camissonia pallida ssp. pallida paleyellow suncup Oenothera abramsii Oenothera micrantha var. exfoliata Sphaerostigma pallida Camissonia parryi redclay suncup Oenothera parryi Camissonia parvula Lewis River suncup Oenothera parvula Camissonia pterosperma wingfruit suncup Oenothera pterosperma Camissonia refracta narrowleaf suncup Oenothera refracta Camissonia scapoidea Paiute suncup Camissonia scapoidea ssp. macrocarpa Paiute suncup Camissonia scapoidea var. macrocarpa Oenothera scapoidea ssp. macrocarpa Camissonia scapoidea ssp. scapoidea Paiute suncup Oenothera scapoidea Oenothera scapoidea var. seorsa Camissonia specuicola Kaibab suncup Camissonia specuicola ssp. hesperia Kaibab suncup Oenothera specuicola ssp. hesperia Camissonia specuicola ssp. specuicola Kaibab suncup Oenothera specuicola Camissonia strigulosa sandysoil suncup Oenothera contorta var. epilobioides Oenothera contorta var. strigulosa Oenothera strigulosa Sphaerostigma strigulosa Camissonia walkeri Walker's suncup Camissonia walkeri ssp. walkeri Walker's suncup Clylismia walkeri Oenothera multijuga var. orientalis Oenothera walkeri Campanula bellflower Campanula parryi Parry's bellflower Campanula parryi var. parryi Parry's bellflower Campanula rotundifolia bluebell bellflower Campanula alaskana Campanula dubia Campanula heterodoxa Campanula intercedens Campanula petiolata Campanula rotundifolia var. alaskana Campanula rotundifolia var. intercedens Campanula rotundifolia ssp. intercedens Campanula rotundifolia var. lancifolia Campanula rotundifolia var. petiolata Campanula rotundifolia var. velutina Campanula sacajaweana Canavalia jackbean Canavalia ensiformis wonderbean Canotia canotia Canotia holacantha crucifixion thorn Capsella capsella Capsella bursa-pastoris shepherd's purse Bursa bursa-pastoris Bursa bursa-pastoris var. bifida Bursa gracilis Capsella rubella Thlaspi bursa-pastoris Capsicum pepper Capsicum annuum cayenne pepper Capsicum annuum var. glabriusculum cayenne pepper Capsicum annuum var. aviculare Capsicum annuum var. minus Capsicum annuum var. minimum Capsicum baccatum Capsicum frutescens Cardamine bittercress Cardamine cordifolia heartleaf bittercress Cardamine cordifolia var. cordifolia heartleaf bittercress Cardamine uintahensis Cardamine parviflora sand bittercress Cardamine parviflora var. arenicola sand bittercress Cardamine arenicola Cardaria whitetop Cardaria draba whitetop Lepidium draba Cardaria pubescens hairy whitetop Cardaria pubescens var. elongata Hymenophysa pubescens Cardiospermum balloonvine Cardiospermum corindum faux persil Cardiospermum corindum var. villosum Cardiospermum keyense Carduus plumeless thistle Carduus nutans nodding plumeless thistle Carex sedge Carex agrostoides grassleaf sedge Carex albonigra blackandwhite sedge Carex alma sturdy sedge Carex aquatilis water sedge Carex aquatilis var. aquatilis water sedge Carex acutinella Carex aquatilis ssp. altior Carex aquatilis var. altior Carex aquatilis var. substricta Carex suksdorfii Carex substricta Carex atherodes wheat sedge Carex athrostachya slenderbeak sedge Carex aurea golden sedge Carex bella southwestern showy sedge Carex uncompahgre Carex bolanderi Bolander's sedge Carex deweyana var. bolanderi Carex brevior shortbeak sedge Carex festucacea var. brevior Carex canescens silvery sedge Carex canescens ssp. canescens silvery sedge Carex curta Carex chihuahuensis Chihuahuan sedge Carex conoidea openfield sedge Carex katahdinensis Carex curatorum Kaibab sedge Carex scirpoidea var. curatorum Carex disperma softleaf sedge Carex douglasii Douglas' sedge Carex duriuscula needleleaf sedge Carex eleocharis Carex stenophylla Carex stenophylla ssp. eleocharis Carex stenophylla var. enervis Carex ebenea ebony sedge Carex elynoides blackroot sedge Carex filifolia threadleaf sedge Carex elyniformis Carex foenea dryspike sedge Carex foenea var. foenea dryspike sedge Carex aenea Carex siccata Carex garberi elk sedge Carex garberi ssp. bifaria Carex garberi var. bifaria Carex geophila White Mountain sedge Carex haydeniana cloud sedge Carex festiva var. decumbens Carex macloviana ssp. haydeniana Carex nubicola Carex heteroneura different nerve sedge Carex heteroneura var. chalciolepis Holm sedge Carex atrata var. chalciolepis Carex chalciolepis Carex heteroneura var. epapillosa different nerve sedge Carex atrata Carex atrata var. erecta Carex epapillosa Carex hystericina bottlebrush sedge Carex interior inland sedge Carex interior ssp. charlestonensis Carex interior var. keweenawensis Carex lativena broadvein sedge Carex lenticularis lakeshore sedge Carex lenticularis var. lipocarpa Kellogg's sedge Carex kelloggii Carex lenticularis var. pallida Carex leptopoda taperfruit shortscale sedge Carex deweyana ssp. leptopoda Carex deweyana var. leptopoda Carex leucodonta Huachuca Mountain sedge Carex mariposana Mariposa sedge Carex paucifructus Carex meadii Mead's sedge Carex tetanica var. meadii Carex microdonta littletooth sedge Carex microptera smallwing sedge Carex festivella Carex limnophila Carex macloviana ssp. festivella Carex macloviana var. microptera Carex microptera var. crassinervia Carex microptera var. limnophila Carex nebrascensis Nebraska sedge Carex occidentalis western sedge Carex neomexicana Carex oreocharis grassyslope sedge Carex pellita woolly sedge Carex lanuginosa Carex lasiocarpa var. latifolia Carex petasata Liddon sedge Carex planostachys cedar sedge Carex praegracilis clustered field sedge Carex camporum Carex rossii Ross' sedge Carex brevipes Carex deflexa var. rossii Carex diversistylis Carex scoparia broom sedge Carex scoparia var. scoparia broom sedge Carex scoparia var. condensa Carex scoparia var. moniliformis Carex tribuloides var. moniliformis Carex scopulorum mountain sedge Carex scopulorum var. bracteosa mountain sedge Carex campylocarpa Carex campylocarpa ssp. affinis Carex gymnoclada Carex senta swamp carex Carex serratodens twotooth sedge Carex bifida Carex specuicola Navajo sedge Carex spissa San Diego sedge Carex stipata owlfruit sedge Carex stipata var. stipata owlfruit sedge Carex subfusca brown sedge Carex macloviana ssp. subfusca Carex stenoptera Carex tahoensis Tahoe sedge Carex eastwoodiana Carex thurberi Thurber's sedge Carex ultra Cochise sedge Carex spissa var. ultra Carex vallicola valley sedge Carex vallicola var. rusbyi Rusby's sedge Carex rusbyi Carex vesicaria blister sedge Carex vesicaria var. vesicaria blister sedge Carex inflata Carex vulpinoidea fox sedge Carex vulpinoidea var. vulpinoidea fox sedge Carex setacea Carex wootonii Wooton's sedge Carlowrightia wrightwort Carlowrightia arizonica Arizona wrightwort Carlowrightia linearifolia heath wrightwort Schaueria linearifolia Carminatia carminatia Carminatia tenuiflora plumeweed Carnegia saguaro Carnegia gigantea saguaro Cereus giganteus Carphochaete bristlehead Carphochaete bigelovii Bigelow's bristlehead Castela castela Castela emoryi crucifixion thorn Holacantha emoryi Castela erecta goatbush Castela erecta ssp. erecta goatbush Castelaria nicholsonii Castilleja Indian paintbrush Castilleja applegatei wavyleaf Indian paintbrush Castilleja applegatei ssp. martinii wavyleaf Indian paintbrush Castilleja angustifolia var. dubia Castilleja chromosa Castilleja clokeyi Castilleja ewanii Castilleja gyroloba Castilleja martinii Castilleja martinii var. clokeyi Castilleja martinii var. ewanii Castilleja martinii ssp. ewanii Castilleja pyramidalis Castilleja roseana Castilleja attenuata attenuate Indian paintbrush Orthocarpus attenuatus Castilleja austromontana Rincon Mountain Indian paintbrush Castilleja exserta exserted Indian paintbrush Castilleja exserta ssp. exserta exserted Indian paintbrush Orthocarpus exsertus Orthocarpus purpurascens Orthocarpus purpurascens var. pallidus Orthocarpus purpurascens var. palmeri Castilleja integra wholeleaf Indian paintbrush Castilleja integra var. gloriosa wholeleaf Indian paintbrush Castilleja integra var. integra wholeleaf Indian paintbrush Castilleja elongata Castilleja kaibabensis Kaibab Plateau Indian paintbrush Castilleja lanata Sierra woolly Indian paintbrush Castilleja lanata ssp. lanata Sierra woolly Indian paintbrush Castilleja linariifolia Wyoming Indian paintbrush Castilleja linearis Castilleja linariifolia var. omnipubescens Castilleja trainii Castilleja lineata marshmeadow Indian paintbrush Castilleja miniata giant red Indian paintbrush Castilleja miniata ssp. miniata giant red Indian paintbrush Castilleja confusa Castilleja gracillima Castilleja inconstans Castilleja oblongifolia Castilleja uliginosa Castilleja minor lesser Indian paintbrush Castilleja minor ssp. minor lesser Indian paintbrush Castilleja exilis Castilleja minor ssp. spiralis lesser Indian paintbrush Castilleja spiralis Castilleja stenantha Castilleja stenantha ssp. spiralis Castilleja nervata TransPecos Indian paintbrush Castilleja cruenta Castilleja patriotica Huachuca Mountain Indian paintbrush Castilleja patriotica var. blumeri Castilleja sessiliflora downy paintedcup Castilleja sulphurea sulphur Indian paintbrush Castilleja luteovirens Castilleja mogollonica Castilleja rhexiifolia var. sulphurea Castilleja tenuiflora Santa Catalina Indian paintbrush Castilleja laxa Catabrosa whorlgrass Catabrosa aquatica water whorlgrass Aira aquatica Catabrosa aquatica var. uniflora Catalpa catalpa Catalpa bignonioides southern catalpa Catalpa catalpa Cathestecum false grama Cathestecum erectum false grama Caulanthus wild cabbage Caulanthus cooperi Cooper's wild cabbage Thelypodium cooperi Ceanothus ceanothus Ceanothus fendleri Fendler's ceanothus Ceanothus fendleri var. venosus Ceanothus fendleri var. viridis Ceanothus subsericeus Ceanothus greggii desert ceanothus Ceanothus greggii var. greggii desert ceanothus Ceanothus greggii var. orbiculatus Ceanothus greggii var. perplexans desert ceanothus Ceanothus greggii ssp. perplexans Ceanothus perplexans Ceanothus greggii var. vestitus Mojave ceanothus Ceanothus greggii ssp. vestitus Ceanothus vestitus Ceanothus integerrimus deerbrush Ceanothus andersonii Ceanothus californicus Ceanothus integerrimus var. californicus Ceanothus integerrimus var. macrothyrsus Ceanothus integerrimus var. puberulus Ceanothus martinii Martin's ceanothus Celtis hackberry Celtis laevigata sugarberry Celtis laevigata var. brevipes sugarberry Celtis brevipes Celtis laevigata var. reticulata netleaf hackberry Celtis douglasii Celtis occidentalis var. reticulata Celtis reticulata Celtis reticulata var. vestita Celtis pallida spiny hackberry Celtis spinosa var. pallida Celtis tala var. pallida Momisia pallida Cenchrus sandbur Cenchrus echinatus southern sandbur Cenchrus echinatus var. hillebrandianus Cenchrus longispinus mat sandbur Cenchrus carolinianus Cenchrus spinifex coastal sandbur Cenchrus incertus Cenchrus parviceps Cenchrus pauciflorus Centaurea knapweed Centaurea americana American star-thistle Centaurea biebersteinii spotted knapweed Acosta maculosa Centaurea maculosa Centaurea calcitrapa red star-thistle Centaurea cyanus garden cornflower Leucacantha cyanus Centaurea diffusa white knapweed Acosta diffusa Centaurea melitensis Maltese star-thistle Centaurea rothrockii Rothrock's knapweed Centaurea solstitialis yellow star-thistle Leucantha solstitialis Centaurium centaury Centaurium arizonicum Arizona centaury Centaurium calycosum var. arizonicum Erythraea calycosa var. arizonica Centaurium exaltatum desert centaury Centaurium namophilum var. nevadense Centaurium nuttallii Cicendia exaltata Centaurium nudicaule Santa Catalina Mountain centaury Centranthus centranthus Centranthus ruber red valerian Kentranthus ruber in Centrostegia centrostegia Centrostegia thurberi red triangles Centrostegia thurberi var. macrotheca Chorizanthe thurberi Chorizanthe thurberi var. macrotheca Cephalanthus buttonbush Cephalanthus occidentalis common buttonbush Cephalanthus occidentalis var. californicus Cephalanthus occidentalis var. pubescens Cerastium mouse-ear chickweed Cerastium arvense field chickweed Cerastium arvense ssp. strictum field chickweed Cerastium alsophilum Cerastium angustatum Cerastium arvense var. angustifolium Cerastium arvense var. latifolium Cerastium arvense var. purpurascens Cerastium arvense var. viscidulum Cerastium campestre Cerastium confertum Cerastium effusum Cerastium elongatum Cerastium graminifolium Cerastium latifolium Cerastium nitidum Cerastium occidentale Cerastium oreophilum Cerastium patulum Cerastium scopulorum Cerastium sonnei Cerastium strictum Cerastium subulatum Cerastium tenuifolium Cerastium vestitum Cerastium beeringianum Bering chickweed Cerastium beeringianum ssp. earlei Bering chickweed Cerastium alpinum var. capillare Cerastium beeringianum var. capillare Cerastium earlei Cerastium brachypodum shortstalk chickweed Cerastium brachypodum var. compactum Cerastium nutans var. brachypodum Cerastium fontanum common mouse-ear chickweed Cerastium fontanum ssp. vulgare big chickweed Cerastium adsurgens Cerastium fontanum ssp. holosteoides Cerastium fontanum ssp. triviale Cerastium holosteoides Cerastium holosteoides var. vulgare Cerastium triviale Cerastium vulgatum 1762 1755 Cerastium vulgatum var. hirsutum Cerastium vulgatum var. holosteoides Cerastium gracile slender chickweed Cerastium nutans nodding chickweed Cerastium nutans var. nutans nodding chickweed Cerastium longepedunculatum Cerastium nutans var. occidentale Cerastium nutans var. obtectum nodding chickweed Cerastium sericeum Cerastium sordidum Chihuahuan chickweed Cerastium texanum Texas chickweed Ceratocephala curveseed butterwort Ceratocephala testiculata curveseed butterwort Ceratocephala falcata Ceratocephala orthoceras Ranunculus falcatus Ranunculus testiculatus Ceratonia ceratonia Ceratonia siliqua St. John's bread Ceratophyllum hornwort Ceratophyllum demersum coon's tail Ceratophyllum apiculatum Ceratophyllum demersum var. apiculatum Ceratophyllum demersum var. apiculatum Cercis redbud Cercis orbiculata California redbud Cercis canadensis var. orbiculata Cercis occidentalis var. orbiculata Cercocarpus mountain mahogany Cercocarpus intricatus littleleaf mountain mahogany Cercocarpus intricatus var. villosus Cercocarpus ledifolius var. intricatus Cercocarpus ledifolius curl-leaf mountain mahogany Cercocarpus ledifolius var. intercedens curl-leaf mountain mahogany Cercocarpus ledifolius var. intermontanus curl-leaf mountain mahogany Cercocarpus montanus alderleaf mountain mahogany Cercocarpus montanus var. glaber birchleaf mountain mahogany Cercocarpus betuloides Cercocarpus betuloides var. multiflorus Cercocarpus montanus var. montanus alderleaf mountain mahogany Cercocarpus montanus var. flabellifolius Cercocarpus montanus var. paucidentatus hairy mountain mahogany Cercocarpus breviflorus Cercocarpus breviflorus var. eximius Cevallia stinging serpent Cevallia sinuata stinging serpent Chaenactis pincushion Chaenactis carphoclinia pebble pincushion Chaenactis carphoclinia var. carphoclinia pebble pincushion Chaenactis carphoclinia var. attenuata Chaenactis douglasii Douglas' dustymaiden Chaenactis douglasii var. douglasii Douglas' dustymaiden Chaenactis angustifolia Chaenactis brachiata Chaenactis brachiata var. stansburiana Chaenactis cineria Chaenactis douglasii var. achilleifolia Chaenactis douglasii var. glandulosa Chaenactis douglasii var. montana Chaenactis douglasii var. nana Chaenactis douglasii var. rubricaulis Chaenactis douglasii var. typicus Chaenactis humilis Chaenactis panamintensis Chaenactis ramosa Chaenactis rubricaulis Chaenactis suksdorfii Chaenactis fremontii pincushion flower Chaenactis macrantha bighead dustymaiden Chaenactis stevioides Steve's dustymaiden Chaenactis gillespiei Chaenactis latifolia Chaenactis mexicana Chaenactis stevioides var. brachypappa Chaenactis stevioides var. thornberi Chaenactis xantiana fleshcolor pincushion Chaerophyllum chervil Chaerophyllum tainturieri hairyfruit chervil Chaerophyllum tainturieri var. tainturieri hairyfruit chervil Chaerophyllum floridanum Chaerophyllum procumbens var. tainturieri Chaerophyllum tainturieri var. floridanum Chaerophyllum texanum Chaetopappa leastdaisy Chaetopappa ericoides rose heath Aster arenosus Aster hirtifolius Aster leucelene Inula ericoides Leucelene ericoides Chamaebatiaria fernbush Chamaebatiaria millefolium fernbush Chamaechaenactis chamaechaenactis Chamaechaenactis scaposa fullstem Chamaechaenactis scaposa var. scaposa fullstem Chaenactis scaposa Chamaecrista sensitive pea Chamaecrista absus tropical sensitive pea Chamaecrista absus var. meonandra tropical sensitive pea Cassia absus var. meonandra Chamaecrista nictitans partridge pea Chamaecrista nictitans ssp. nictitans partridge pea Chamaecrista nictitans ssp. nictitans var. leptadenia partridge pea Cassia leptadenia Cassia nictitans var. mensalis Chamaecrista serpens slender sensitive pea Chamaecrista serpens var. wrightii Wright's sensitive pea Cassia wrightii Chamaecrista wrightii Chamaesaracha five eyes Chamaesaracha coronopus greenleaf five eyes Chamaesaracha sordida hairy five eyes Chamaesyce sandmat Chamaesyce abramsiana Abrams' sandmat Euphorbia abramsiana Chamaesyce albomarginata whitemargin sandmat Euphorbia albomarginata Chamaesyce arizonica Arizona sandmat Chamaesyce versicolor Euphorbia arizonica Euphorbia versicolor Chamaesyce capitellata head sandmat Chamaesyce pycnanthema Euphorbia capitellata Euphorbia pycnanthema Chamaesyce chaetocalyx bristlecup sandmat Chamaesyce chaetocalyx var. chaetocalyx bristlecup sandmat Chamaesyce fendleri var. chaetocalyx Euphorbia chaetocalyx Euphorbia fendleri var. chaetocalyx Chamaesyce dioica royal sandmat Chamaesyce indivisa Euphorbia indivisa Chamaesyce fendleri Fendler's sandmat Euphorbia fendleri Euphorbia fendleri var. typica Chamaesyce florida Chiricahua Mountain sandmat Euphorbia florida Chamaesyce glyptosperma ribseed sandmat Euphorbia glyptosperma Chamaesyce gracillima Mexican sandmat Euphorbia gracillima Chamaesyce hirta pillpod sandmat Euphorbia hirta Euphorbia pilulifera Chamaesyce hypericifolia graceful sandmat Chamaesyce glomerifera Euphorbia bifida Euphorbia glomerifera Euphorbia hypericifolia Chamaesyce hyssopifolia hyssopleaf sandmat Chamaesyce brasiliensis Euphorbia brasiliensis Euphorbia hyssopifolia Chamaesyce maculata spotted sandmat Chamaesyce mathewsii Chamaesyce supina Chamaesyce tracyi Euphorbia maculata Euphorbia supina Chamaesyce melanadenia squaw sandmat Euphorbia melanadenia Chamaesyce micromera Sonoran sandmat Euphorbia micromera Chamaesyce ocellata Contura Creek sandmat Chamaesyce ocellata ssp. arenicola Contura Creek sandmat Chamaesyce ocellata var. arenicola Euphorbia ocellata var. arenicola Euphorbia ocellata ssp. arenicola Euphorbia ocellata var. kirbyi Chamaesyce parryi Parry's sandmat Euphorbia parryi Chamaesyce pediculifera Carrizo Mountain sandmat Euphorbia pediculifera Chamaesyce platysperma flatseed sandmat Euphorbia platysperma Chamaesyce polycarpa smallseed sandmat Chamaesyce polycarpa var. hirtella Euphorbia polycarpa Euphorbia polycarpa var. hirtella Chamaesyce prostrata prostrate sandmat Euphorbia chamaesyce Euphorbia prostrata Chamaesyce revoluta threadstem sandmat Euphorbia revoluta Chamaesyce serpens matted sandmat Euphorbia serpens Chamaesyce serpyllifolia thymeleaf sandmat Chamaesyce serpyllifolia ssp. serpyllifolia thymeleaf sandmat Chamaesyce albicaulis Chamaesyce neomexicana Euphorbia neomexicana Euphorbia serpyllifolia Chamaesyce serrula sawtooth sandmat Euphorbia serrula Chamaesyce setiloba Yuma sandmat Euphorbia setiloba Chamaesyce stictospora slimseed sandmat Euphorbia stictospora Chamaesyce trachysperma San Pedro River sandmat Euphorbia trachysperma Chamaesyce vermiculata wormseed sandmat Chamaesyce rafinesquei Euphorbia vermiculata Chamerion fireweed Chamerion angustifolium fireweed Chamerion angustifolium ssp. circumvagum fireweed Chamaenerion angustifolium ssp. circumvagum Chamerion danielsii Chamerion platyphyllum Epilobium angustifolium var. abbreviatum Epilobium angustifolium ssp. circumvagum Epilobium angustifolium var. canescens Epilobium angustifolium ssp. macrophyllum Epilobium angustifolium var. macrophyllum Epilobium angustifolium var. platyphyllum Chasmanthium woodoats Chasmanthium latifolium Indian woodoats Uniola latifolia Cheilanthes lipfern Cheilanthes alabamensis Alabama lipfern Pellaea alabamensis Cheilanthes arizonica Arizona lipfern Cheilanthes pyramidalis var. arizonica Cheilanthes bonariensis golden lipfern Notholaena aurea Cheilanthes covillei Coville's lipfern Cheilanthes eatonii Eaton's lipfern Cheilanthes castanea Cheilanthes feei slender lipfern Cheilanthes fendleri Fendler's lipfern Cheilanthes lendigera nitbearing lipfern Cheilanthes lindheimeri fairyswords Cheilanthes xparishii pro sp. [covillei x parryi] Cheilanthes parryi Parry's lipfern Notholaena parryi Cheilanthes pringlei Pringle's lipfern Cheilanthes tomentosa woolly lipfern Cheilanthes villosa villous lipfern Cheilanthes wootonii beaded lipfern Cheilanthes wrightii Wright's lipfern Cheilanthes yavapensis graceful lipfern Chenopodium goosefoot Chenopodium album lambsquarters Chenopodium album var. album lambsquarters Chenopodium album var. lanceolatum Chenopodium album var. polymorphum Chenopodium amaranticolor Chenopodium giganteum Chenopodium lanceolatum Chenopodium suecicum Chenopodium ambrosioides Mexican tea Chenopodium ambrosioides var. ambrosioides Mexican tea Ambrina ambrosioides Chenopodium ambrosioides var. anthelminticum Chenopodium ambrosioides var. anthelminticum Chenopodium ambrosioides var. chilense Chenopodium ambrosioides ssp. euambrosioides Chenopodium ambrosioides var. typicum Chenopodium ambrosioides var. vagans Chenopodium obovatum Chenopodium retusum Teloxys ambrosioides Teloxys vagans Chenopodium atrovirens pinyon goosefoot Chenopodium aridum Chenopodium fremontii var. atrovirens Chenopodium incognitum Chenopodium wolfii Chenopodium berlandieri pitseed goosefoot Chenopodium berlandieri var. berlandieri pitseed goosefoot Chenopodium album var. berlandieri Chenopodium berlandieri var. sinuatum pitseed goosefoot Chenopodium berlandieri ssp. pseudopetiolare Chenopodium berlandieri var. zschackii Zschack's goosefoot Chenopodium acerifolium Chenopodium berlandieri var. farinosum Chenopodium berlandieri ssp. platyphyllum Chenopodium berlandieri ssp. zschackii Chenopodium botrys Jerusalem oak goosefoot Botrydium botrys Teloxys botrys Chenopodium capitatum blite goosefoot Blitum capitatum Chenopodium desiccatum aridland goosefoot Chenopodium leptophyllum var. oblongifolium Chenopodium oblongifolium Chenopodium pratericola ssp. desiccatum Chenopodium pratericola var. oblongifolium Chenopodium fremontii Fremont's goosefoot Chenopodium fremontii var. fremontii Fremont's goosefoot Chenopodium graveolens fetid goosefoot Chenopodium graveolens var. neomexicanum Chenopodium incisum Chenopodium incisum var. neomexicanum Teloxys graveolens Chenopodium hians hians goosefoot Chenopodium incognitum Chenopodium incanum mealy goosefoot Chenopodium incanum var. elatum mealy goosefoot Chenopodium incanum var. incanum mealy goosefoot Chenopodium fremontii var. incanum Chenopodium incanum var. occidentale mealy goosefoot Chenopodium leptophyllum narrowleaf goosefoot Chenopodium album var. leptophyllum Chenopodium murale nettleleaf goosefoot Chenopodium neomexicanum New Mexico goosefoot Chenopodium neomexicanum var. neomexicanum New Mexico goosefoot Chenopodium arizonicum Chenopodium pratericola desert goosefoot Chenopodium albescens Chenopodium desiccatum var. leptophylloides Chenopodium pratericola ssp. eupratericola Chenopodium pratericola var. leptophylloides Chenopodium pumilio clammy goosefoot Chenopodium carinatum Teloxys pumilio Chenopodium rubrum red goosefoot Chenopodium salinum Rocky Mountain goosefoot Chenopodium glaucum var. pulchrum Chenopodium glaucum ssp. salinum Chenopodium glaucum var. salinum Chenopodium watsonii Watson's goosefoot Chenopodium dacoticum Chenopodium glabrescens Chenopodium olidum Chilopsis desert willow Chilopsis linearis desert willow Chilopsis linearis ssp. arcuata desert willow Chilopsis linearis var. arcuata Chimaphila prince's pine Chimaphila maculata striped prince's pine Chimaphila maculata var. dasystemma Chimaphila umbellata pipsissewa Chimaphila umbellata ssp. acuta pipsissewa Chimaphila umbellata var. acuta Chloracantha chloracantha Chloracantha spinosa spiny chloracantha Aster spinosus Erigeron ortegae Leucosyris spinosa Chloris windmill grass Chloris crinita false Rhodes grass Chloris mendocina Trichloris crinita Trichloris mendocina Chloris gayana Rhodes grass Chloris xsubdolichostachya pro sp. [cucullata x verticillata] shortspike windmill grass Chloris latisquamea Chloris verticillata tumble windmill grass Chloris virgata feather fingergrass Choisya Mexican orange Choisya dumosa Mexican orange Choisya dumosa var. arizonica Arizonia orange Choisya arizonica Choisya dumosa var. mollis Mexican orange Choisya mollis Chorispora chorispora Chorispora tenella crossflower Chorizanthe spineflower Chorizanthe brevicornu brittle spineflower Chorizanthe brevicornu var. brevicornu brittle spineflower Chorizanthe corrugata wrinkled spineflower Acanthogonum corrugatum Chorizanthe rigida devil's spineflower Acanthogonum rigidum Chorizanthe watsonii fivetooth spineflower Chromolaena thoroughwort Chromolaena bigelovii Bigelow's thoroughwort Eupatorium bigelovii Chrysanthemum daisy Chrysanthemum coronarium crowndaisy Chrysothamnus rabbitbrush Chrysothamnus baileyi Bailey's rabbitbrush Chrysothamnus pulchellus ssp. baileyi Chrysothamnus pulchellus var. baileyi Ericameria pulchella ssp. baileyi Chrysothamnus depressus longflower rabbitbrush Ericameria depressa Chrysothamnus greenei Greene's rabbitbrush Chrysothamnus greenei var. filifolius Chrysothamnus greenei ssp. filifolius Ericameria filifolia Chrysothamnus linifolius spearleaf rabbitbrush Chrysothamnus viscidiflorus var. linifolius Chrysothamnus viscidiflorus ssp. linifolius Ericameria linifolia Chrysothamnus molestus Arizona rabbitbrush Chrysothamnus viscidiflorus var. molestus Ericameria molesta Chrysothamnus viscidiflorus yellow rabbitbrush Chrysothamnus viscidiflorus ssp. axillaris yellow rabbitbrush Chrysothamnus axillaris Ericameria viscidiflora ssp. axillaris Chrysothamnus viscidiflorus ssp. lanceolatus yellow rabbitbrush Chrysothamnus viscidiflorus var. elegans Chrysothamnus viscidiflorus ssp. elegans Chrysothamnus viscidiflorus var. lanceolatus Ericameria viscidiflora ssp. lanceolata Chrysothamnus viscidiflorus ssp. planifolius yellow rabbitbrush Ericameria viscidiflora ssp. planifolia Chrysothamnus viscidiflorus ssp. puberulus yellow rabbitbrush Chrysothamnus viscidiflorus var. puberulus Ericameria viscidiflora ssp. puberula Chrysothamnus viscidiflorus ssp. viscidiflorus yellow rabbitbrush Chrysothamnus viscidiflorus ssp. viscidiflorus var. stenophyllus yellow rabbitbrush Chrysothamnus viscidiflorus ssp. stenophyllus Ericameria viscidiflora var. stenophylla Chrysothamnus viscidiflorus ssp. viscidiflorus var. viscidiflorus yellow rabbitbrush Chrysothamnus viscidiflorus ssp. pumilus Chrysothamnus viscidiflorus var. pumilus Chrysothamnus viscidiflorus ssp. typicus Chrysothamnus viscidiflorus var. typicus Ericameria viscidiflora Cichorium chicory Cichorium intybus chicory Cicuta water hemlock Cicuta maculata spotted water hemlock Cicuta maculata var. angustifolia spotted water hemlock Cicuta occidentalis Cicuta maculata var. bolanderi spotted water hemlock Cicuta bolanderi Cicuta maculata var. maculata spotted water hemlock Cicuta curtissii Cicuta maculata var. curtissii Cicuta mexicana Cimicifuga bugbane Cimicifuga arizonica Arizona bugbane Circaea enchanter's nightshade Circaea alpina small enchanter's nightshade Circaea alpina ssp. alpina small enchanter's nightshade Circaea alpina ssp. pacifica small enchanter's nightshade Circaea alpina var. pacifica Circaea pacifica Cirsium thistle Cirsium arcuum powderpuff thistle Cirsium arizonicum Arizona thistle Cirsium arizonicum var. arizonicum Arizona thistle Cnicus arizonicus Cirsium arizonicum var. nidulum Arizona thistle Cirsium nidulum Cirsium arvense Canada thistle Carduus arvensis Cirsium arvense var. argenteum Cirsium arvense var. horridum Cirsium arvense var. integrifolium Cirsium arvense var. mite Cirsium arvense var. vestitum Cirsium incanum Cirsium setosum Serratula arvensis Cirsium chellyense queen thistle Cirsium chuskaense monarch thistle Cirsium drummondii dwarf thistle Cirsium coccinatum Cirsium flodmanii Flodman's thistle Cirsium nebraskense var. discissum Cirsium oblanceolatum Cirsium grahamii Graham's thistle Cirsium navajoense Navajo thistle Cirsium neomexicanum New Mexico thistle Cirsium neomexicanum var. neomexicanum New Mexico thistle Cirsium ochrocentrum yellowspine thistle Cnicus ochrocentrus Cirsium parryi Parry's thistle Cirsium parryi ssp. mogollonicum Mogollon thistle Cirsium parryi ssp. parryi Parry's thistle Cnicus parryi Cirsium rothrockii Rothrock's thistle Cirsium diffusum Cirsium pulchellum ssp. diffusum Cirsium rusbyi Rusby's thistle Cirsium rydbergii Rydberg's thistle Cirsium lactucinum Cirsium tioganum stemless thistle Cirsium tioganum var. coloradense Colorado thistle Carduus coloradensis Cirsium coloradense Cirsium tioganum var. tioganum Tioga thistle Carduus americanus Cirsium acaulescens Cirsium acaule var. americanum Cirsium americanum Cirsium coloradense ssp. acaulescens Cirsium coloradense ssp. longissimum Cirsium drummondii var. acaulescens Cirsium drummondii ssp. lanatum Cirsium drummondii ssp. latisquamum Cirsium drummondii var. oregonense Cirsium drummondii ssp. vexans Cirsium quercetorum var. citrinum Cnicus drummondii var. acaulescens Cnicus tioganus Cirsium undulatum wavyleaf thistle Cirsium undulatum var. undulatum wavyleaf thistle Carduus helleri Carduus undulatus Cirsium helleri Cirsium megacephalum Cirsium ochrocentrum var. helleri Cirsium undulatum var. megacephalum Cnicus undulatus var. megacephalus Cirsium virginense virgin thistle Cirsium vulgare bull thistle Carduus lanceolatus Carduus vulgaris Cirsium lanceolatum Cirsium lanceolatum var. hypoleucum Cirsium wheeleri Wheeler's thistle Cirsium blumeri Cirsium perennans Cnicus wheeleri Cirsium wrightii Wright's thistle Cissus treebine Cissus trifoliata sorrelvine Cissus incisa Sicyos trifoliatus Cistanthe pussypaws Cistanthe ambigua desert pussypaws Calandrinia ambigua Cistanthe monandra common pussypaws Calyptridium monandrum Cistanthe parryi Parry's pussypaws Cistanthe parryi var. arizonica Arizona pussypaws Calyptridium parryi var. arizonicum Cladium sawgrass Cladium californicum California sawgrass Cladium mariscus var. californicum Mariscus californicus Clarkia clarkia Clarkia epilobioides canyon clarkia Godetia epilobioides Clarkia purpurea winecup clarkia Clarkia purpurea ssp. quadrivulnera winecup clarkia Clarkia quadrivulnera Godetia purpurea var. parviflora Godetia quadrivulnera Godetia quadrivulnera var. vacensis Clarkia rhomboidea diamond clarkia Claytonia springbeauty Claytonia parviflora streambank springbeauty Claytonia parviflora ssp. parviflora streambank springbeauty Claytonia perfoliata var. parviflora Montia parviflora Montia perfoliata var. parviflora Claytonia parviflora ssp. utahensis streambank springbeauty Claytonia perfoliata var. utahensis Limnia utahensis Montia perfoliata var. utahensis Claytonia perfoliata miner's lettuce Claytonia perfoliata ssp. intermontana miner's lettuce Claytonia perfoliata ssp. mexicana miner's lettuce Claytonia perfoliata ssp. perfoliata miner's lettuce Claytonia perfoliata var. angustifolia Limnia perfoliata Montia perfoliata Claytonia rosea western springbeauty Claytonia lanceolata var. rosea Claytonia rubra redstem springbeauty Claytonia rubra ssp. depressa redstem springbeauty Claytonia parviflora var. depressa Claytonia perfoliata var. depressa Montia perfoliata var. depressa Claytonia rubra ssp. rubra redstem springbeauty Clematis leather flower Clematis bigelovii Bigelow's leather flower Coriflora bigelovii Clematis columbiana rock clematis Clematis columbiana var. columbiana rock clematis Atragene columbiana Clematis pseudoalpina Clematis verticillaris var. columbiana Clematis drummondii Drummond's clematis Clematis hirsutissima hairy clematis Clematis hirsutissima var. arizonica Arizona clematis Clematis hirsutissima var. hirsutissima hairy clematis Coriflora hirsutissima Clematis ligusticifolia western white clematis Clematis ligusticifolia var. ligusticifolia western white clematis Clematis neomexicana Clematis suksdorfii Clematis palmeri Palmer's leather flower Coriflora palmeri Cleome spiderflower Cleome isomeris bladderpod spiderflower Isomeris arborea Isomeris arborea var. angustata Isomeris arborea var. globosa Isomeris arborea var. insularis Cleome lutea yellow spiderflower Cleome lutea var. jonesii Jones spiderflower Cleome jonesii Cleome lutea var. lutea yellow spiderflower Cleome multicaulis slender spiderflower Cleome sonorae Cleome serrulata Rocky Mountain beeplant Cleome serrulata var. angusta Cleomella stinkweed Cleomella longipes Chiricahua Mountain stinkweed Cleomella obtusifolia Mojave cleomella Cleomella obtusifolia var. pubescens Clinopodium clinopodium Clinopodium vulgare wild basil Calamintha vulgaris Clinopodium vulgare var. neogaea Satureja vulgaris Satureja vulgaris var. diminuta Satureja vulgaris var. neogaea Clitoria pigeonwings Clitoria mariana Atlantic pigeonwings Martiusia mariana Cnicus cnicus Cnicus benedictus blessed thistle Centaurea benedicta Cirsium pugnax Cnidoscolus cnidoscolus Cnidoscolus angustidens mala mujer Cocculus coralbead Cocculus diversifolius snailseed Coeloglossum frog orchid Coeloglossum viride longbract frog orchid Coeloglossum viride var. virescens longbract frog orchid Coeloglossum bracteatum Coeloglossum viride ssp. bracteatum Habenaria bracteata Habenaria viridis var. bracteata Coleogyne coleogyne Coleogyne ramosissima blackbrush Collinsia blue eyed Mary Collinsia parviflora maiden blue eyed Mary Antirrhinum tenellum Collinsia grandiflora var. pusilla Collinsia tenella Collomia trumpet Collomia grandiflora grand collomia Collomia linearis tiny trumpet Cologania cologania Cologania angustifolia longleaf cologania Cologania longifolia Cologania lemmonii Lemmon's cologania Cologania pallida pale cologania Colubrina nakedwood Colubrina californica Las Animas nakedwood Colubrina texensis var. californica Comandra bastard toadflax Comandra umbellata bastard toadflax Comandra umbellata ssp. californica California bastard toadflax Comandra californica Comandra umbellata var. californica Comandra umbellata ssp. pallida pale bastard toadflax Comandra pallida Comandra umbellata var. angustifolia Comandra umbellata var. pallida Commelina dayflower Commelina dianthifolia birdbill dayflower Commelina dianthifolia var. dianthifolia birdbill dayflower Commelina dianthifolia var. longispatha birdbill dayflower Commelina linearis var. longispatha Commelina erecta whitemouth dayflower Commelina erecta var. angustifolia whitemouth dayflower Commelina angustifolia Commelina crispa Commelina erecta var. crispa Commelina nashii Commelina erecta var. deamiana whitemouth dayflower Commelina erecta var. greenei Commelina erecta var. erecta whitemouth dayflower Commelina elegans Commelina saxicola Condalia snakewood Condalia correllii Correll's snakewood Condalia ericoides javelin bush Microrhamnus ericoides Condalia globosa bitter snakewood Condalia globosa var. pubescens bitter snakewood Condalia spathulata squawbush Condalia warnockii Warnock's snakewood Condalia warnockii var. kearneyana Kearney's snakewood Conioselinum hemlockparsley Conioselinum mexicanum Mexican hemlockparsley Conioselinum scopulorum Rocky Mountain hemlockparsley Conium poison hemlock Conium maculatum poison hemlock Conoclinium thoroughwort Conoclinium greggii palmleaf thoroughwort Eupatorium greggii Conopholis squawroot Conopholis alpina alpine squawroot Conopholis alpina var. mexicana Mexican squawroot Conopholis mexicana Orobanche multiflora var. xanthochroa Orobanche xanthochroa Conringia hare's ear mustard Conringia orientalis hare's ear mustard Brassica orientalis Consolida knight's-spur Consolida ajacis doubtful knight's-spur Consolida ambigua Delphinium ajacis Delphinium ambiguum Convolvulus bindweed Convolvulus arvensis field bindweed Convolvulus ambigens Convolvulus incanus Strophocaulos arvensis Convolvulus equitans Texas bindweed Convolvulus hermannioides Convolvulus simulans Conyza horseweed Conyza bonariensis asthmaweed Erigeron bonariensis Erigeron linifolius Leptilon bonariense Leptilon linifolium Conyza canadensis Canadian horseweed Conyza canadensis var. canadensis Canadian horseweed Erigeron canadensis Leptilon canadense Conyza canadensis var. glabrata Canadian horseweed Erigeron canadensis var. glabratus Conyza canadensis var. pusilla Canadian horseweed Conyza parva Erigeron canadensis var. pusillus Erigeron pusillus Leptilon pusillum Corallorrhiza coralroot Corallorrhiza maculata summer coralroot Corallorrhiza maculata var. maculata summer coralroot Corallorrhiza maculata var. flavida Corallorrhiza multiflora Corallorrhiza maculata var. occidentalis summer coralroot Corallorrhiza maculata var. immaculata Corallorrhiza maculata var. intermedia Corallorrhiza maculata ssp. occidentalis Corallorrhiza maculata var. punicea Corallorrhiza striata hooded coralroot Corallorrhiza striata var. vreelandii Vreeland's coralroot Corallorrhiza bigelovii Corallorrhiza wisteriana spring coralroot Corchorus corchorus Corchorus hirtus Orinoco jute Corchorus hirtus var. glabellus Corchorus hirtus var. orinocensis Corchorus orinocensis Cordia cordia Cordia parvifolia small-leaf geigertree Cordylanthus bird's-beak Cordylanthus laxiflorus nodding bird's-beak Cordylanthus nevinii Nevin's bird's-beak Cordylanthus parviflorus purple bird's-beak Cordylanthus glandulosus Cordylanthus wrightii Wright's bird's beak Cordylanthus wrightii ssp. kaibabensis Kaibab bird's beak Cordylanthus wrightii ssp. tenuifolius Wright's bird's beak Cordylanthus tenuifolius Cordylanthus wrightii ssp. wrightii Wright's bird's beak Cordylanthus wrightii var. pauciflorus Coreocarpus coreocarpus Coreocarpus arizonicus little lemonhead Coreopsis tickseed Coreopsis californica California tickseed Coreopsis californica var. newberryi Newberry's tickseed Coreopsis newberryi Coreopsis douglasii Douglas' tickseed Coreopsis stillmanii var. jonesii Leptosyne douglasii Coreopsis tinctoria golden tickseed Coreopsis tinctoria var. atkinsoniana Atkinson's tickseed Coreopsis atkinsoniana Coreopsis tinctoria var. tinctoria golden tickseed Coreopsis cardaminefolia Coreopsis stenophylla Coreopsis tinctoria var. imminuta Coriandrum coriander Coriandrum sativum coriander Corispermum bugseed Corispermum americanum American bugseed Corispermum americanum var. americanum American bugseed Corispermum marginale Corispermum orientale Corispermum simplicissimum Corispermum americanum var. rydbergii American bugseed Corispermum hyssopifolium Corispermum nitidum Cornus dogwood Cornus sericea redosier dogwood Cornus sericea ssp. sericea redosier dogwood Cornus alba Cornus alba var. baileyi Cornus alba var. interior Cornus alba ssp. stolonifera Cornus baileyi Cornus instolonea Cornus interior Cornus sericea var. interior Cornus sericea ssp. stolonifera Cornus stolonifera Cornus stolonifera var. baileyi Cornus stolonifera var. interior Swida instolonea Swida sericea Swida stolonifera Coronilla crownvetch Coronilla varia purple crownvetch Securigera varia Coronopus swinecress Coronopus didymus lesser swinecress Carara didyma Lepidium didymum Corydalis fumewort Corydalis aurea scrambled eggs Capnoides aureum Corydalis washingtoniana Corydalis curvisiliqua curvepod fumewort Corydalis curvisiliqua ssp. occidentalis curvepod fumewort Capnoides montanum Corydalis aurea var. occidentalis Corydalis aurea ssp. occidentalis Corydalis montana Coryphantha beehive cactus Coryphantha recurvata Santa Cruz beehive cactus Mammillaria recurvata Coryphantha scheeri Scheer's beehive cactus Coryphantha scheeri var. robustispina longtubercle beehive cactus Cactus robustispinus Coryphantha robustispina Mammillaria robustispina Coryphantha scheeri var. scheeri Scheer's beehive cactus Mammillaria scheeri Coryphantha scheeri var. valida Scheer's beehive cactus Cosmos cosmos Cosmos bipinnatus garden cosmos Cosmos parviflorus southwestern cosmos Coreopsis parviflora Cottea cotta grass Cottea pappophoroides cotta grass Cotula waterbuttons Cotula australis Australian waterbuttons Cotula coronopifolia common brassbuttons Coursetia babybonnets Coursetia caribaea anil falso Coursetia caribaea var. sericea anil falso Cracca edwardsii var. sericea Cracca sericea Coursetia glabella smooth babybonnets Benthamantha edwardsii var. glabella Benthamantha glabella Cracca edwardsii var. glabella Cracca glabella Coursetia glandulosa rosary babybonnets Coursetia microphylla Crassula pygmyweed Crassula connata sand pygmyweed Crassula connata var. erectoides sand pygmyweed Crassula connata var. eremica sand pygmyweed Tillaea erecta ssp. eremica Tillaea erecta var. eremica Crassula connata var. subsimplex sand pygmyweed Tillaea leptopetala Tillaea minima var. subsimplex Crassula viridis pricklyseed pygmyweed Tillaea viridis Tillaeastrum viride Crataegus hawthorn Crataegus erythropoda cerro hawthorn Crataegus rivularis river hawthorn Crataegus douglasii var. rivularis Crataegus wootoniana Wooton's hawthorn Crepis hawksbeard Crepis acuminata tapertip hawksbeard Crepis acuminata ssp. acuminata tapertip hawksbeard Crepis acuminata ssp. typica Psilochenia acuminata Crepis intermedia limestone hawksbeard Psilochenia intermedia Crepis occidentalis largeflower hawksbeard Crepis occidentalis ssp. costata largeflower hawksbeard Crepis occidentalis var. costata Psilochenia occidentalis ssp. costata Crepis occidentalis ssp. occidentalis largeflower hawksbeard Crepis occidentalis ssp. typica Psilochenia occidentalis Crepis runcinata fiddleleaf hawksbeard Crepis runcinata ssp. barberi Barber's hawksbeard Crepis barberi Crepis glauca ssp. barberi Crepis runcinata var. barberi Psilochenia runcinata ssp. barberi Crepis runcinata ssp. glauca fiddleleaf hawksbeard Crepis glauca Crepis runcinata var. glauca Psilochenia runcinata ssp. glauca Cressa alkaliweed Cressa truxillensis spreading alkaliweed Cressa depressa Cressa insularis Cressa truxillensis var. minima Cressa truxillensis var. vallicola Crossosoma rockflower Crossosoma bigelovii ragged rockflower Crossosoma bigelovii var. bigelovii ragged rockflower Crossosoma parviflorum Crossosoma bigelovii var. glaucum ragged rockflower Crossosoma glaucum Crotalaria rattlebox Crotalaria pumila low rattlebox Crotalaria sagittalis arrowhead rattlebox Crotalaria sagittalis var. blumeriana Crotalaria sagittalis var. fruticosa Crotalaria sagittalis var. oblonga Croton croton Croton californicus California croton Croton californicus var. californicus California croton Croton californicus var. longipes Croton californicus var. mohavensis Croton longipes Croton californicus var. tenuis California croton Croton ciliatoglandulifer Mexican croton Croton fruticulosus bush croton Croton lindheimerianus threeseed croton Croton lindheimerianus var. lindheimerianus threeseed croton Croton lindheimerianus var. tharpii Tharp's croton Croton monanthogynus prairie tea Croton pottsii leatherweed Croton pottsii var. pottsii leatherweed Croton corymbulosus Croton setigerus dove weed Eremocarpus setigerus Croton sonorae Sonoran croton Croton texensis Texas croton Croton texensis var. texensis Texas croton Croton texensis var. utahensis Utah croton Croton wigginsii Wiggins' croton Crusea mountain saucerflower Crusea diversifolia mountain saucerflower Crusea subulata Crusea wrightii Crypsis pricklegrass Crypsis schoenoides swamp pricklegrass Heleochloa schoenoides Cryptantha cryptantha Cryptantha abata dentnut cryptantha Cryptantha albida New Mexico cryptantha Cryptantha angustifolia Panamint cryptantha Eremocarya angustifolia Cryptantha atwoodii Atwood's cryptantha Cryptantha bakeri Baker's cryptantha Oreocarya bakeri Cryptantha barbigera bearded cryptantha Cryptantha capitata capitate cryptantha Cryptantha cinerea James' cryptantha Cryptantha cinerea var. arenicola James' cryptantha Cryptantha cinerea var. cinerea James' cryptantha Cryptantha jamesii var. cinerea Cryptantha jamesii var. multicaulis Cryptantha jamesii var. setosa Cryptantha cinerea var. jamesii James' cryptantha Cryptantha jamesii Cryptantha jamesii var. disticha Cryptantha jamesii var. typica Cryptantha suffruticosa Oreocarya suffruticosa Cryptantha cinerea var. pustulosa James' cryptantha Cryptantha jamesii var. pustulosa Cryptantha pustulosa Oreocarya pustulosa Cryptantha circumscissa cushion cryptantha Cryptantha circumscissa var. circumscissa cushion cryptantha Cryptantha circumscissa var. genuina Greeneocharis circumscissa Cryptantha confertiflora basin yellow cryptantha Oreocarya confertiflora Cryptantha costata ribbed cryptantha Cryptantha saxorum Cryptantha crassisepala thicksepal cryptantha Cryptantha crassisepala var. elachantha thicksepal cryptantha Cryptantha decipiens gravelbar cryptantha Cryptantha dumetorum bushloving cryptantha Cryptantha fendleri sanddune cryptantha Cryptantha pattersonii Cryptantha flava Brenda's yellow cryptantha Oreocarya flava Cryptantha flavoculata roughseed cryptantha Oreocarya flavoculata Cryptantha fulvocanescens tawny cryptantha Cryptantha fulvocanescens var. nitida tawny cryptantha Oreocarya nitida Cryptantha ganderi Gander's cryptantha Cryptantha gracilis narrowstem cryptantha Cryptantha holoptera winged cryptantha Cryptantha inaequata Eritrichium holopterum Cryptantha humilis roundspike cryptantha Cryptantha alpicola Cryptantha humilis var. commixta Cryptantha humilis var. nana Cryptantha humilis var. ovina Cryptantha humilis var. shantzii Cryptantha nana Cryptantha nana var. commixta Cryptantha nana var. ovina Cryptantha nana var. shantzii Cryptantha nana var. typica Oreocarya humilis Oreocarya humilis ssp. nana Cryptantha intermedia Clearwater cryptantha Cryptantha barbigera var. fergusoniae Cryptantha fragilis Cryptantha grandiflora Cryptantha hendersonii Cryptantha intermedia var. grandiflora Cryptantha maritima Guadalupe cryptantha Cryptantha maritima var. maritima Guadalupe cryptantha Cryptantha maritima var. pilosa Guadalupe cryptantha Cryptantha micrantha redroot cryptantha Cryptantha micrantha var. micrantha redroot cryptantha Eremocarya micrantha Cryptantha muricata pointed cryptantha Cryptantha muricata var. denticulata pointed cryptantha Cryptantha muricata var. jonesii Jones' cryptantha Cryptantha nevadensis Nevada cryptantha Cryptantha nevadensis var. nevadensis Nevada cryptantha Cryptantha nevadensis var. rigida Nevada cryptantha Cryptantha osterhoutii Osterhout's cryptantha Oreocarya osterhoutii Cryptantha pterocarya wingnut cryptantha Cryptantha pterocarya var. cycloptera wingnut cryptantha Cryptantha pterocarya var. purpusii Cryptantha pterocarya var. pterocarya wingnut cryptantha Cryptantha pterocarya var. stenoloba wingnut cryptantha Cryptantha pusilla low cryptantha Eritrichium pusillum Cryptantha racemosa bushy cryptantha Cryptantha recurvata curvenut cryptantha Cryptantha semiglabra smooth cryptantha Cryptantha setosissima bristly cryptantha Cryptantha tenuis canyon cryptantha Cryptantha utahensis scented cryptantha Krynitzkia utahensis Cryptantha virginensis Virgin River cryptantha Oreocarya virginensis Cryptogramma rockbrake Cryptogramma acrostichoides American rockbrake Cryptogramma crispa ssp. acrostichoides Cucurbita gourd Cucurbita digitata fingerleaf gourd Cucurbita foetidissima Missouri gourd Pepo foetidissima Cucurbita palmata coyote gourd Cucurbita californica Cuphea waxweed Cuphea wrightii Wright's waxweed Cuphea wrightii var. nematopetala Parsonsia wrightii Cupressus cypress Cupressus arizonica Arizona cypress Cupressus arizonica ssp. arizonica Arizona cypress Cupressus arizonica var. glabra Cupressus glabra Cuscuta dodder Cuscuta applanata Gila River dodder Cuscuta californica chaparral dodder Cuscuta californica var. californica chaparral dodder Cuscuta cephalanthi buttonbush dodder Grammica cephalanthi Cuscuta coryli hazel dodder Grammica coryli Cuscuta dentatasquamata los pinitos dodder Cuscuta denticulata desert dodder Cuscuta denticulata var. denticulata desert dodder Grammica denticulata Cuscuta erosa Sonoran dodder Cuscuta gronovii scaldweed Cuscuta gronovii var. gronovii scaldweed Cuscuta gronovii var. latiflora Cuscuta gronovii var. saururi Cuscuta umbrosa Grammica gronovii Grammica umbrosa Cuscuta indecora bigseed alfalfa dodder Cuscuta mitriformis Cochise dodder Cuscuta odontolepis Santa Rita Mountain dodder Cuscuta pentagona fiveangled dodder Cuscuta pentagona var. pentagona fiveangled dodder Cuscuta arvensis Cuscuta campestris Cuscuta pentagona var. calycina Grammica campestris Grammica pentagona Cuscuta potosina globe dodder Cuscuta potosina var. globifera globe dodder Cuscuta salina saltmarsh dodder Cuscuta salina var. salina saltmarsh dodder Grammica salina Cuscuta tuberculata tubercle dodder Cuscuta umbellata flatglobe dodder Cuscuta umbellata var. reflexa Grammica umbellata Cuscuta warneri Warner's dodder Cuscuta indecora var. warneri Cycladenia waxydogbane Cycladenia humilis Sacramento waxydogbane Cycladenia humilis var. jonesii Jones' waxydogbane Cycladenia jonesii Cyclanthera cyclanthera Cyclanthera dissecta cutleaf cyclanthera Cycloloma cycloloma Cycloloma atriplicifolium winged pigweed Kochia atriplicifolia Cyclospermum marsh parsley Cyclospermum leptophyllum marsh parsley Apium leptophyllum Apium tenuifolium Cyclospermum ammi Sison ammi Cymopterus springparsley Cymopterus acaulis plains springparsley Cymopterus acaulis var. fendleri Fendler's springparsley Cymopterus fendleri Cymopterus bulbosus bulbous springparsley Cymopterus jonesii Jones' springparsley Cymopterus purpureus var. jonesii Epallageiton jonesii Cymopterus megacephalus largeleaf springparsley Cymopterus multinervatus purplenerve springparsley Cymopterus newberryi sweetroot springparsley Cymopterus purpurascens widewing springparsley Cymopterus purpureus purple springparsley Epallageiton purpureum Cynanchum swallow-wort Cynanchum arizonicum Arizona swallow-wort Metastelma arizonicum Cynanchum ligulatum Mexican swallow-wort Cynanchum sinaloense Mellichampia sinaloensis Cynanchum utahense Utah swallow-wort Astephanus utahensis Cynanchum wigginsii Wiggins' swallow-wort Basistelma angustifolia angustifolium Metastelma mexicanum Cynara cynara Cynara scolymus globe artichoke Cynodon Bermudagrass Cynodon dactylon Bermudagrass Capriola dactylon Panicum dactylon Cynoglossum hound's tongue Cynoglossum officinale gypsyflower Cyperus flatsedge Cyperus acuminatus tapertip flatsedge Cyperus aggregatus inflatedscale flatsedge Cyperus cayennensis Cyperus flavus Cyperus huarmensis Cyperus obesus Mariscus cayennensis Mariscus flavus Cyperus amabilis foothill flatsedge Cyperus amabilis var. macrostachyus Cyperus dentoniae hairy flatsedge Mariscus pubescens Cyperus pubescens Cyperus difformis variable flatsedge Cyperus dipsaceus Wright's flatsedge Cyperus wrightii Cyperus erythrorhizos redroot flatsedge Cyperus halei Cyperus esculentus chufa flatsedge Cyperus esculentus var. leptostachyus chufa flatsedge Cyperus esculentus Cyperus esculentus var. angustispicatus Cyperus fendlerianus Fendler's flatsedge Mariscus fendlerianus Cyperus flavicomus whiteedge flatsedge Cyperus albomarginatus Cyperus sabulosus Pycreus flavicomus Cyperus hermaphroditus Cyperus incompletus Cyperus hypopitys Cyperus laevigatus smooth flatsedge Cyperus careyi Cyperus neokunthianus Cyperus manimae spectacular flatsedte Cyperus manimae var. asperrimus spectacular flatsedte Cyperus mutisii Mutis' flatsedge Cyperus asper Cyperus mutisii var. asper Cyperus pringlei Mariscus mutisii Cyperus niger black flatsedge Cyperus diandrus var. capitatus Cyperus melanostachyus Cyperus niger var. capitatus Cyperus niger var. castaneus Pycreus niger Cyperus odoratus fragrant flatsedge Cyperus acicularis Cyperus eggersii Cyperus engelmannii Cyperus ferax Cyperus ferruginescens Cyperus longispicatus Cyperus macrocephalus Cyperus macrocephalus var. eggersii Cyperus odoratus var. acicularis Cyperus odoratus var. engelmannii Cyperus odoratus var. squarrosus Cyperus speciosus Cyperus speciosus var. squarrosus Mariscus huarmensis Torulinium confertum Torulinium eggersii Torulinium odoratum Cyperus pallidicolor pallid flatsedge Cyperus parishii Parish's flatsedge Cyperus retroflexus oneflower flatsedge Cyperus uniflorus Cyperus uniflorus var. pseudothyrsiflorus Cyperus rotundus nutgrass Cyperus schweinitzii Schweinitz's flatsedge Cyperus xmesochoreus Cyperus schweinitzii var. uberior Mariscus schweinitzii Cyperus seslerioides Texas flatsedge Cyperus spectabilis spectacular flatsedge Cyperus buckleyi Cyperus sphaerolepis Rusby's flatsedge Cyperus fendlerianus var. debilis Cyperus rusbyi Cyperus squarrosus bearded flatsedge Cyperus aristatus Cyperus aristatus var. runyonii Cyperus inflexus Cyperus squarrosus var. runyonii Cyperus strigosus strawcolored flatsedge Cyperus hansenii Cyperus stenolepis Cyperus strigosus var. capitatus Cyperus strigosus var. multiflorus Cyperus strigosus var. robustior Cyperus strigosus var. stenolepis Cyperus tetragonus fourangle flatsedge Cypripedium lady's slipper Cypripedium pubescens greater yellow lady's slipper Cypripedium pubescens var. pubescens greater yellow lady's slipper Cypripedium calceolus var. pubescens Cypripedium calceolus var. planipetalum Cypripedium furcatum Cypripedium parviflorum var. pubescens Cypripedium planipetalum Cypselea cypselea Cypselea humifusa panal Cystopteris bladderfern Cystopteris bulbifera bulblet bladderfern Filix bulbifera Cystopteris fragilis brittle bladderfern Cystopteris dickieana Cystopteris fragilis var. angustata Cystopteris fragilis ssp. dickieana Cystopteris fragilis var. woodsioides Filix fragilis Cystopteris reevesiana Reeves' bladderfern Cystopteris fragilis var. tenuifolia Cystopteris tenuis upland brittle bladderfern Cystopteris fragilis var. mackayi Cystopteris utahensis Utah bladderfern Dactylis orchardgrass Dactylis glomerata orchardgrass Dactylis glomerata ssp. glomerata orchardgrass Dactylis glomerata var. ciliata Dactylis glomerata var. detonsa Dactylis glomerata var. vivipara Dactyloctenium crowfoot grass Dactyloctenium aegyptium Egyptian grass Cynosurus aegyptius Dactyloctenium radulans buttongrass Eleusine radulans Dalea prairie clover Dalea albiflora whiteflower prairie clover Dalea ordiae Petalostemon pilosulus Dalea aurea golden prairie clover Parosela aurea Dalea brachystachya Fort Bowie prairie clover Dalea lemmonii Dalea candida white prairie clover Dalea candida var. oligophylla white prairie clover Dalea oligophylla Petalostemon candidus var. oligophyllus Petalostemon occidentalis Petalostemon oligophyllus Dalea exigua Chihuahuan prairie clover Petalostemon exilis Dalea exserta Mexican prairie clover Dalea filiformis Sonoran prairie clover Dalea flavescens Canyonlands prairie clover Dalea epica Dalea flavescens var. epica Petalostemon flavescens Dalea formosa featherplume Dalea grayi Gray's prairie clover Dalea jamesii James' prairie clover Dalea lachnostachys glandleaf prairie clover Dalea lanata woolly prairie clover Dalea lanata var. terminalis woolly prairie clover Dalea glaberrima Dalea terminalis Dalea leporina foxtail prairie clover Dalea alopecuroides Dalea lagopus Parosela alopecuroides Dalea lumholtzii Lumholtz's prairie clover Dalea mollis hairy prairie clover Dalea mollissima soft prairie clover Dalea mollis var. mollissima Dalea neomexicana ssp. mollissima Dalea nana dwarf prairie clover Dalea nana var. carnescens dwarf prairie clover Dalea nana var. elatior Dalea nana var. nana dwarf prairie clover Parosela nana Dalea neomexicana downy prairie clover Dalea neomexicana var. neomexicana downy prairie clover Dalea pogonathera bearded prairie clover Dalea pogonathera var. pogonathera bearded prairie clover Dalea polygonoides sixweeks prairie clover Dalea polygonoides var. anomala Dalea pringlei Pringle's prairie clover Dalea pulchra Santa Catalina prairie clover Dalea purpurea violet prairie clover Dalea purpurea var. purpurea violet prairie clover Petalostemon mollis Petalostemon purpureus Petalostemon purpureus var. mollis Dalea searlsiae Searls' prairie clover Petalostemon searlsiae Dalea tentaculoides Gentry's indigobush Dalea urceolata pineforest prairie clover Dalea versicolor oakwoods prairie clover Dalea versicolor ssp. versicolor oakwoods prairie clover Dalea versicolor ssp. versicolor var. sessilis oakwoods prairie clover Dalea wislizeni ssp. sessilis Dalea wislizeni var. sanctae-crucis Dalea wrightii Wright's prairie clover Danthonia oatgrass Danthonia californica California oatgrass Danthonia americana Danthonia californica var. americana Danthonia californica var. palousensis Danthonia californica var. piperi Danthonia intermedia timber oatgrass Danthonia canadensis Danthonia intermedia var. cusickii Dasiphora shrubby cinquefoil Dasiphora floribunda shrubby cinquefoil Dasiphora fruticosa Pentaphylloides floribunda nom. super. Pentaphylloides fruticosa Potentilla floribunda Potentilla fruticosa Potentilla fruticosa ssp. floribunda Potentilla fruticosa var. tenuifolia Dasylirion sotol Dasylirion wheeleri common sotol Dasyochloa woollygrass Dasyochloa pulchella low woollygrass Erioneuron pulchellum Tridens pulchellus Triodia pulchella Datura jimsonweed Datura discolor desert thorn-apple Datura quercifolia Chinese thorn-apple Datura ferox Datura stramonium jimsonweed Datura stramonium var. tatula Datura tatula Datura wrightii sacred thorn-apple Datura inoxia ssp. quinquecuspida Datura meteloides Datura metel var. quinquecuspida Daucus wild carrot Daucus carota Queen Anne's lace Daucus pusillus American wild carrot Delphinium larkspur Delphinium andesicola Chiricahua Mountain larkspur Delphinium andesicola ssp. amplum Delphinium sierrae-blancae ssp. amplum Delphinium barbeyi subalpine larkspur Delphinium exaltatum var. barbeyi Delphinium occidentale var. barbeyi Delphinium xconfertiflorum pro sp. [scaposum x wootonii] Delphinium geraniifolium Clark Valley larkspur Delphinium amplibracteatum Delphinium tenuisectum ssp. amplibracteatum Delphinium glaucum Sierra larkspur Delphinium brownii Delphinium scopulorum Delphinium scopulorum var. glaucum Delphinium nuttallianum twolobe larkspur Delphinium nelsonii Delphinium nelsonii ssp. utahense Delphinium nuttallianum var. fulvum Delphinium nuttallianum var. levicaule Delphinium sonnei Delphinium parishii desert larkspur Delphinium parishii ssp. parishii Parish's larkspur Delphinium amabile Delphinium amabile ssp. apachense Delphinium amabile ssp. clarianum Delphinium apachense Delphinium scaposum tall mountain larkspur Delphinium andersonii var. scaposum Delphinium scopulorum Rocky Mountain larkspur Delphinium wootonii Organ Mountain larkspur Delphinium geyeri var. wootonii Delphinium virescens ssp. wootonii Delphinium virescens var. wootonii Deschampsia hairgrass Deschampsia caespitosa tufted hairgrass Aira caespitosa Aira cespitosa [orthographic variant] Deschampsia caespitosa var. arctica Deschampsia caespitosa var. alpicola Deschampsia caespitosa var. abbei Deschampsia caespitosa ssp. glauca Deschampsia caespitosa var. glauca Deschampsia caespitosa ssp. genuina Deschampsia caespitosa var. intercotidalis Deschampsia caespitosa var. longiflora Deschampsia caespitosa var. littoralis Deschampsia caespitosa var. maritima Deschampsia caespitosa var. mackenzieana Deschampsia caespitosa ssp. orientalis Deschampsia caespitosa ssp. parviflora Deschampsia caespitosa var. parviflora Deschampsia caespitosa ssp. paramushirensis Deschampsia cespitosa [orthographic variant] Deschampsia cespitosa var. alpicola [orthographic variant] Deschampsia cespitosa var. arctica [orthographic variant] Deschampsia cespitosa var. abbei [orthographic variant] Deschampsia cespitosa var. glauca [orthographic variant] Deschampsia cespitosa ssp. glauca [orthographic variant] Deschampsia cespitosa ssp. genuina [orthographic variant] Deschampsia cespitosa var. intercotidalis [orthographic variant] Deschampsia cespitosa var. littoralis [orthographic variant] Deschampsia cespitosa var. longiflora [orthographic variant] Deschampsia cespitosa var. maritima [orthographic variant] Deschampsia cespitosa var. mackenzieana [orthographic variant] Deschampsia cespitosa ssp. orientalis [orthographic variant] Deschampsia cespitosa var. parviflora [orthographic variant] Deschampsia cespitosa ssp. paramushirensis [orthographic variant] Deschampsia cespitosa ssp. parviflora [orthographic variant] Deschampsia glauca Deschampsia mackenzieana Deschampsia paramushirensis Deschampsia pumila Deschampsia sukatschewii Deschampsia danthonioides annual hairgrass Aira danthonioides Deschampsia calycina Deschampsia danthonioides var. gracilis Deschampsia elongata slender hairgrass Aira elongata Descurainia tansymustard Descurainia californica Sierra tansymustard Descurainia incana mountain tansymustard Descurainia incana ssp. incisa mountain tansymustard Descurainia incisa Descurainia richardsonii ssp. incisa Descurainia richardsonii var. sonnei Sisymbrium incisum Sophia incisa Descurainia incana ssp. viscosa mountain tansymustard Descurainia incana var. viscosa Descurainia richardsonii ssp. viscosa Descurainia richardsonii var. viscosa Sisymbrium viscosum Sophia viscosa Descurainia obtusa blunt tansymustard Descurainia obtusa ssp. adenophora blunt tansymustard Descurainia obtusa ssp. obtusa blunt tansymustard Descurainia obtusa ssp. brevisiliqua Descurainia obtusa ssp. typica Descurainia pinnata western tansymustard Descurainia pinnata ssp. filipes western tansymustard Descurainia incisa ssp. filipes Descurainia pinnata var. filipes Sisymbrium incisum var. filipes Sisymbrium longipedicellatum Sophia filipes Descurainia pinnata ssp. glabra western tansymustard Descurainia pinnata var. glabra Sophia glabra Descurainia pinnata ssp. halictorum western tansymustard Descurainia halictorum var. andrenarium Descurainia pinnata var. halictorum Descurainia pinnata var. osmiarum Sophia andrenarium Sophia andrenarium var. osmiarum Sophia halictorum Descurainia pinnata ssp. ochroleuca western tansymustard Descurainia pinnata var. ochroleuca Sophia ochroleuca Descurainia pinnata ssp. paysonii Payson's tansymustard Descurainia incisa ssp. paysonii Descurainia pinnata var. paysonii Descurainia sophia herb sophia Sisymbrium sophia Sophia sophia Desmanthus bundleflower Desmanthus cooleyi Cooley's bundleflower Desmanthus covillei Coville's bundleflower Desmanthus glandulosus glandular bundleflower Desmanthus virgatus var. glandulosus Desmanthus virgatus wild tantan Desmanthus virgatus var. virgatus wild tantan Acuan virgatum Desmodium ticktrefoil Desmodium arizonicum Arizona ticktrefoil Meibomia arizonica Desmodium batocaulon San Pedro ticktrefoil Meibomia batocaulis Desmodium cinerascens spiked ticktrefoil Meibomia cinerascens Desmodium grahamii Graham's ticktrefoil Meibomia grahamii Desmodium gramineum grassleaf ticktrefoil Desmodium angustifolium var. gramineum Meibomia graminea Desmodium intortum greenleaf ticktrefoil Meibomia intorta Desmodium metcalfei Metcalfe's ticktrefoil Meibomia metcalfei Desmodium neomexicanum New Mexico ticktrefoil Meibomia neomexicana Desmodium procumbens western trailing ticktrefoil Desmodium procumbens var. exiguum western trailing ticktrefoil Desmodium psilocarpum Santa Cruz Island ticktrefoil Desmodium psilophyllum simpleleaf ticktrefoil Desmodium wrightii Meibomia psilophylla Desmodium retinens Santa Rita Mountain ticktrefoil Desmodium wislizeni Meibomia retinens Meibomia wrightii Desmodium rosei Rose's ticktrefoil Desmodium scopulorum Sonoran ticktrefoil Desmodium wigginsii Dichanthelium rosette grass Dichanthelium acuminatum tapered rosette grass Dichanthelium acuminatum var. acuminatum tapered rosette grass Panicum acuminatum Panicum auburne Panicum benneri Panicum chrysopsidifolium Dichanthelium acuminatum var. fasciculatum western panicgrass Dichanthelium acuminatum var. implicatum Dichanthelium lanuginosum Dichanthelium lanuginosum var. fasciculatum Panicum acuminatum var. fasciculatum Panicum acuminatum var. implicatum Panicum brodiei Panicum curtifolium Panicum glutinoscabrum Panicum huachucae Panicum huachucae var. fasciculatum Panicum implicatum Panicum lassenianum Panicum lanuginosum Panicum languidum Panicum lanuginosum var. fasciculatum Panicum lanuginosum var. huachucae Panicum lanuginosum var. implicatum Panicum lanuginosum var. tennesseense Panicum lindheimeri var. fasciculatum Panicum occidentale Panicum pacificum Panicum subvillosum Panicum tennesseense Dichanthelium oligosanthes Heller's rosette grass Dichanthelium oligosanthes var. scribnerianum Scribner's rosette grass Dichanthelium oligosanthes var. helleri Panicum helleri Panicum macrocarpon Panicum oligosanthes var. helleri Panicum oligosanthes var. scribnerianum Panicum scoparium Panicum scribnerianum Dichelostemma snakelily Dichelostemma capitatum bluedicks Dichelostemma capitatum ssp. capitatum bluedicks Brodiaea capitata Brodiaea pulchella Dichelostemma lacuna-vernalis Dichelostemma pulchellum Dichelostemma pulchellum var. capitatum Hookeria pulchella Dichelostemma capitatum ssp. pauciflorum bluedicks Brodiaea pulchella var. pauciflora Dichelostemma pulchellum var. pauciflorum Dichondra ponysfoot Dichondra argentea silver ponysfoot Dichondra brachypoda New Mexico ponysfoot Dichondra sericea silverleaf ponysfoot Dichondra repens var. sericea Dicliptera foldwing Dicliptera resupinata Arizona foldwing Dicliptera pseudoverticillaris Diapedium resupinatum Diapedium torreyi Dicliptera torreyi Justicia resupinata Dicoria twinbugs Dicoria canescens desert twinbugs Dicoria canescens ssp. brandegeei desert twinbugs Dicoria brandegeei Dicoria canescens var. brandegeei Dicoria paniculata Dicoria canescens ssp. canescens desert twinbugs Dicoria oblongifolia Digitaria crabgrass Digitaria californica Arizona cottontop Trichachne californica Digitaria ciliaris southern crabgrass Digitaria adscendens Digitaria sanguinalis var. ciliaris Digitaria sanguinalis var. marginata Digitaria sanguinalis var. rhachiseta Panicum adscendens Panicum ciliare Syntherisma marginata Digitaria cognata Carolina crabgrass Digitaria cognata var. pubiflora Carolina crabgrass Digitaria cognata ssp. pubiflora Panicum autumnale var. pubiflorum Digitaria insularis sourgrass Andropogon insulare Trichachne insularis Trichachne nutans Valota insularis Digitaria ischaemum smooth crabgrass Digitaria ischaemum var. mississippiensis Panicum ischaemum Syntherisma ischaemum Digitaria sanguinalis hairy crabgrass Panicum sanguinale Syntherisma sanguinalis Dimorphocarpa spectaclepod Dimorphocarpa pinnatifida tansy spectaclepod Dimorphocarpa wislizeni touristplant Dithyrea griffithsii Dithyrea wislizeni Dithyrea wislizeni var. griffithsii Diodia buttonweed Diodia teres poorjoe Diodia teres var. angustata poorjoe Diodia teres var. teres poorjoe Diodella teres Diodia teres var. setifera Diphysa diphysa Diphysa thurberi Thurber's diphysa Diplotaxis wallrocket Diplotaxis muralis annual wallrocket Sisymbrium murale Diplotaxis tenuifolia perennial wallrocket Sisymbrium tenuifolium Dipsacus teasel Dipsacus fullonum Fuller's teasel Dipsacus fullonum ssp. sylvestris Fuller's teasel Dipsacus sylvestris Disporum fairybells Disporum trachycarpum roughfruit fairybells Disporum trachycarpum var. subglabrum Prosartes trachycarpa Distichlis saltgrass Distichlis spicata inland saltgrass Distichlis spicata var. borealis Distichlis spicata var. divaricata Distichlis spicata var. nana Distichlis spicata var. stolonifera Distichlis spicata var. stricta Distichlis spicata ssp. stricta Distichlis stricta Distichlis stricta var. dentata Uniola spicata Dithyrea shieldpod Dithyrea californica California shieldpod Dodecatheon shootingstar Dodecatheon alpinum alpine shootingstar Dodecatheon alpinum ssp. majus alpine shootingstar Dodecatheon dentatum white shootingstar Dodecatheon dentatum ssp. ellisiae Ellis' shootingstar Dodecatheon ellisiae Dodecatheon pulchellum darkthroat shootingstar Dodecatheon pulchellum ssp. pulchellum darkthroat shootingstar Dodecatheon pauciflorum Dodecatheon pauciflorum var. salinum Dodecatheon pauciflorum var. watsonii Dodecatheon pulchellum ssp. pauciflorum Dodecatheon pulchellum var. watsonii Dodecatheon pulchellum var. watsonii Dodecatheon pulchellum var. watsonii Dodecatheon pulchellum var. zionense Dodecatheon radicatum Dodecatheon radicatum ssp. watsonii Dodecatheon salinum Dodecatheon zionense Dodonaea dodonaea Dodonaea viscosa Florida hopbush Dodonaea ehrenbergii Dodonaea elaeagnoides Dodonaea eriocarpa Dodonaea eriocarpa var. amphioxea Dodonaea eriocarpa var. confertior Dodonaea eriocarpa var. costulata Dodonaea eriocarpa var. degeneri Dodonaea eriocarpa var. forbesii Dodonaea eriocarpa var. glabrescens Dodonaea eriocarpa var. hillebrandii Dodonaea eriocarpa var. hosakana Dodonaea eriocarpa var. lanaiensis Dodonaea eriocarpa var. molokaiensis Dodonaea eriocarpa var. oblonga Dodonaea eriocarpa var. obtusior Dodonaea eriocarpa var. pallida Dodonaea eriocarpa var. sherffii Dodonaea eriocarpa var. skottsbergii Dodonaea eriocarpa var. vaccinioides Dodonaea eriocarpa var. varians Dodonaea eriocarpa var. waimeana Dodonaea jamaicensis Dodonaea microcarya Dodonaea sandwicensis Dodonaea sandwicensis var. latifolia Dodonaea sandwicensis var. simulans Dodonaea spathulata Dodonaea stenoptera Dodonaea stenoptera var. fauriei Dodonaea viscosa var. angustifolia Dodonaea viscosa var. arborescens Dodonaea viscosa var. linearis Dodonaea viscosa var. spathulata Ptelea viscosa Draba draba Draba albertina slender draba Draba crassifolia var. nevadensis Draba nitida Draba stenoloba var. nana Draba asprella rough draba Draba asprella var. asprella rough draba Draba asprella var. typica Draba asprella var. kaibabensis Kaibab draba Draba asprella var. stelligera rough draba Draba aurea golden draba Draba aurea var. leiocarpa Draba aurea var. neomexicana Draba minganensis Draba neomexicana Draba brachycarpa shortpod draba Draba crassifolia snowbed draba Draba crassifolia var. typica Draba parryi Draba cuneifolia wedgeleaf draba Draba cuneifolia var. cuneifolia wedgeleaf draba Draba cuneifolia var. foliosa Draba cuneifolia var. helleri Draba cuneifolia var. leiocarpa Draba cuneifolia var. typica Draba cuneifolia var. integrifolia wedgeleaf draba Draba sonorae var. integrifolia Draba cuneifolia var. sonorae Sonora draba Draba sonorae Draba helleriana Heller's draba Draba helleriana var. bifurcata Heller's draba Draba helleriana var. blumeri Blumer's draba Draba helleriana var. patens Heller's draba Draba petrophila Santa Rita Mountain draba Draba petrophila var. petrophila Santa Rita Mountain draba Draba petrophila var. viridis Santa Rita Mountain draba Draba platycarpa broadpod draba Draba cuneifolia var. platycarpa Draba viperensis Draba rectifructa mountain draba Draba reptans Carolina draba Draba caroliniana Draba micrantha Draba reptans var. micrantha Draba reptans var. stellifera Draba reptans ssp. stellifera Draba reptans var. typica Draba spectabilis showy draba Draba spectabilis var. spectabilis showy draba Draba spectabilis var. typica Draba standleyi Standley's draba Dracocephalum dragonhead Dracocephalum parviflorum American dragonhead Moldavica parviflora Drymaria drymary Drymaria effusa pinewoods drymary Drymaria effusa var. depressa pinewoods drymary Drymaria depressa Drymaria effusa var. effusa pinewoods drymary Drymaria glandulosa Fendler's drymary Drymaria fendleri Drymaria leptophylla canyon drymary Drymaria tenella Drymaria molluginea slimleaf drymary Drymaria sperguloides Drymaria pachyphylla thickleaf drymary Drymaria viscosa sticky drymary Dryopetalon dryopetalon Dryopetalon runcinatum rockmustard Dryopteris woodfern Dryopteris arguta coastal woodfern Dryopteris cinnamomea cinnamon woodfern Dryopteris filix-mas male fern Dryopteris rossii Ross' woodfern Dryopteris patula var. rossii Dudleya dudleya Dudleya collomiae Gila County liveforever Dudleya saxosa ssp. collomiae Echeveria collomiae Dudleya pulverulenta chalk dudleya Dudleya pulverulenta ssp. arizonica chalk dudleya Dudleya arizonica Dudleya pulverulenta var. arizonica Echeveria arizonica Echeveria pulverulenta ssp. arizonica Duranta duranta Duranta erecta golden dewdrops Duranta erecta var. alba Duranta repens Duranta repens var. alba Duranta repens var. microphylla Dyschoriste snakeherb Dyschoriste decumbens spreading snakeherb Calophanes decumbens Dyssodia dyssodia Dyssodia papposa fetid marigold Boebera papposa Tagetes papposa Echeandia echeandia Echeandia flavescens Torrey's craglily Anthericum flavescens Anthericum torreyi Echinocactus echinocactus Echinocactus horizonthalonius devilshead Echinocactus horizonthalonius var. horizonthalonius devilshead Echinocactus horizonthalonius var. moelleri Echinocactus horizonthalonius var. nicholii Nichol's echinocactus Echinocactus polycephalus cottontop cactus Echinocactus polycephalus var. polycephalus cottontop cactus Echinocactus polycephalus var. xeranthemoides cottontop cactus Echinocactus xeranthemoides Echinocereus hedgehog cactus Echinocereus coccineus scarlet hedgehog cactus Echinocereus coccineus var. arizonicus Arizona hedgehog cactus Echinocereus polyacanthus var. neomexicanus Echinocereus triglochidiatus var. arizonicus Echinocereus triglochidiatus var. neomexicanus Echinocereus coccineus var. coccineus scarlet hedgehog cactus Coryphantha vivipara var. aggregata Echinocereus coccineus var. conoideus Echinocereus coccineus var. inermis Echinocereus octacanthus Echinocereus polyacanthus var. rosei Echinocereus triglochidiatus var. hexaedrus Echinocereus triglochidiatus var. inermis Echinocereus triglochidiatus var. melanacanthus Echinocereus triglochidiatus var. octacanthus Mammillaria aggregata Echinocereus dasyacanthus spiny hedgehog cactus Echinocereus ctenoides Echinocereus dasyacanthus var. hildmannii Echinocereus pectinatus var. ctenoides Echinocereus pectinatus var. dasyacanthus Echinocereus pectinatus var. neomexicanus Echinocereus engelmannii Engelmann's hedgehog cactus Echinocereus engelmannii var. acicularis Engelmann's hedgehog cactus Echinocereus engelmannii var. chrysocentrus Engelmann's hedgehog cactus Echinocereus engelmannii var. engelmannii Engelmann's hedgehog cactus Echinocereus engelmannii var. variegatus Engelmann's hedgehog cactus Echinocereus fendleri pinkflower hedgehog cactus Echinocereus fendleri var. bonkerae pinkflower hedgehog cactus Echinocereus bonkerae Echinocereus fasciculatus var. bonkerae Echinocereus fendleri var. boyce-thompsonii Boyce hedgehog cactus Echinocereus boyce-thompsonii Echinocereus fasciculatus var. boyce-thompsonii Echinocereus fendleri var. fasciculatus pinkflower hedgehog cactus Echinocereus abbeae Echinocereus fasciculatus Echinocereus fendleri var. robustus Echinocereus rectispinus var. robustus Echinocereus reichenbachii var. robustus Mammillaria fasciculata Echinocereus fendleri var. fendleri pinkflower hedgehog cactus Echinocereus fendleri var. ledingii Leding's hedgehog cactus Echinocereus ledingii Echinocereus fendleri var. rectispinus pinkflower hedgehog cactus Echinocereus rectispinus Echinocereus nicholii Nichol's hedgehog cactus Echinocereus engelmannii var. nicholii Echinocereus pectinatus rainbow cactus Echinocereus pectinatus var. pectinatus rainbow cactus Echinocereus polyacanthus Mojave mound cactus Echinocereus triglochidiatus var. polyacanthus Echinocereus rigidissimus rainbow hedgehog cactus Cereus pectinatus var. rigidissimus Echinocereus pectinatus var. rigidissimus Echinocereus triglochidiatus kingcup cactus Echinocereus triglochidiatus var. mojavensis Mojave kingcup cactus Echinocereus mojavensis Echinocereus triglochidiatus var. toroweapensis kingcup cactus Echinocereus triglochidiatus var. triglochidiatus kingcup cactus Echinocereus kunzei Echinocereus triglochidiatus var. gonacanthus Echinochloa cockspur grass Echinochloa colona jungle rice Panicum colonum Echinochloa crus-galli barnyardgrass Panicum crus-galli Echinochloa crus-pavonis gulf cockspur grass Echinochloa crus-pavonis var. macera gulf cockspur grass Echinochloa crus-galli var. zelayensis Echinochloa zelayensis Echinochloa muricata rough barnyardgrass Echinochloa muricata var. microstachya rough barnyardgrass Echinochloa crus-galli var. mitis Echinochloa microstachya Echinochloa muricata var. occidentalis Echinochloa muricata var. wiegandii Echinochloa occidentalis Echinochloa pungens var. microstachya Echinochloa pungens var. multiflora Echinochloa wiegandii Echinochloa oplismenoides Chihuahuan cockspur Echinocystis echinocystis Echinocystis lobata wild cucumber Micrampelis lobata Sicyos lobata Echinodorus burrhead Echinodorus berteroi upright burrhead Echinodorus berteroi var. lanceolatus Echinodorus rostratus Echinodorus rostratus var. lanceolatus Echinopepon balsam apple Echinopepon wrightii wild balsam apple Elaterium wrightii Eclipta eclipta Eclipta prostrata false daisy Eclipta alba Eclipta erecta Verbesina alba Verbesina prostrata Egeria egeria Egeria densa Brazilian waterweed Anacharis densa Elodea densa Philotria densa Eichhornia water hyacinth Eichhornia crassipes common water hyacinth Eichhornia speciosa Piaropus crassipes Elaeagnus elaeagnus Elaeagnus angustifolia Russian olive Elatine waterwort Elatine brachysperma shortseed waterwort Elatine obovata Elatine triandra var. brachysperma Elatine californica California waterwort Elatine californica var. williamsii Elatine chilensis Chilean waterwort Elatine gracilis Elatine rubella southwestern waterwort Elatine triandra Eleocharis spikerush Eleocharis acicularis needle spikerush Eleocharis acicularis var. acicularis needle spikerush Eleocharis acicularis var. occidentalis Eleocharis acicularis var. typica Eleocharis reverchonii Eleocharis bella beautiful spikerush Eleocharis acicularis var. bella Eleocharis acicularis var. minima Eleocharis engelmannii Engelmann's spikerush Eleocharis engelmannii var. monticola Eleocharis engelmannii var. robusta Eleocharis monticola Eleocharis monticola var. pallida Eleocharis obtusa var. detonsa Eleocharis obtusa var. engelmannii Eleocharis ovata var. engelmannii Eleocharis flavescens yellow spikerush Eleocharis flavescens var. flavescens yellow spikerush Eleocharis flavescens var. fuscescens Eleocharis praticola Heleocharis flaccida Heleocharis flaccida var. fuscescens Scirpus flavescens Eleocharis geniculata Canada spikesedge Eleocharis caribaea Eleocharis capitata var. dispar Eleocharis caribaea var. dispar Scirpus caribaea Eleocharis montana mountain spikerush Eleocharis montana var. nodulosa Eleocharis nodulosa Eleocharis montevidensis sand spikerush Eleocharis arenicola Eleocharis ovata ovate spikerush Eleocharis annua Eleocharis obtusa var. heuseri Eleocharis obtusa var. ovata Scirpus ovatus Eleocharis palustris common spikerush Eleocharis calva var. australis Eleocharis macrostachya Eleocharis mamillata Eleocharis palustris var. australis Eleocharis palustris var. major Eleocharis palustris var. vigens Eleocharis perlonga Eleocharis smallii Eleocharis smallii var. major Eleocharis xyridiformis Eleocharis parishii Parish's spikerush Eleocharis disciformis Eleocharis montevidensis var. disciformis Eleocharis montevidensis var. parishii Eleocharis parvula dwarf spikerush Eleocharis coloradoensis Eleocharis leptos Eleocharis leptos var. coloradoensis Eleocharis leptos var. johnstonii Eleocharis membranacea Eleocharis parvula var. anachaeta Eleocharis parvula var. coloradoensis Eleocharis quinqueflora fewflower spikerush Eleocharis bernardina Eleocharis pauciflora Eleocharis pauciflora var. bernardina Eleocharis pauciflora var. fernaldii Eleocharis pauciflora var. suksdorfiana Eleocharis quinqueflora var. bernardina Eleocharis quinqueflora ssp. fernaldii Eleocharis quinqueflora ssp. suksdorfiana Eleocharis quinqueflora var. suksdorfiana Eleocharis suksdorfiana Scirpus nanus Scirpus pauciflorus Scirpus quinqueflorus Eleocharis radicans rooted spikerush Eleocharis acicularis var. radicans Eleocharis lindheimeri Eleocharis rostellata beaked spikerush Eleocharis rostellata var. congdonii Eleocharis rostellata var. occidentalis Scirpus rostellatus Eleusine goosegrass Eleusine indica Indian goosegrass Cynosurus indicus Elionurus balsamscale grass Elionurus barbiculmis woolyspike balsamscale Elionurus barbiculmis var. parviflorus Elodea waterweed Elodea bifoliata twoleaf waterweed Elodea longivaginata Elodea nevadensis Elodea canadensis Canadian waterweed Anacharis canadensis Anacharis canadensis var. planchonii Elodea brandegeeae Elodea ioensis Elodea linearis Elodea planchonii Philotria canadensis Philotria linearis Elymus wildrye Elymus arizonicus Arizona wheatgrass Agropyron arizonicum Agropyron spicatum var. arizonicum Elytrigia arizonica Pseudoroegneria arizonica Elymus canadensis Canada wildrye Elymus brachystachys Elymus canadensis var. brachystachys Elymus canadensis var. hirsutus Elymus canadensis var. robustus Elymus crescendus Elymus philadelphicus Elymus philadelphicus var. hirsutus Elymus robustus Elymus elymoides squirreltail Elymus elymoides ssp. brevifolius squirreltail Elymus elymoides var. brevifolius Elymus longifolius Sitanion hystrix var. brevifolium Sitanion longifolium Sitanion velutinum Elymus elymoides ssp. elymoides squirreltail Elymus sitanion Sitanion elymoides Sitanion hystrix Elymus glaucus blue wildrye Elymus glaucus ssp. glaucus blue wildrye Elymus glaucus var. breviaristatus Elymus interruptus Texas wildrye Elymus canadensis var. interruptus Elymus lanceolatus streambank wheatgrass Elymus lanceolatus ssp. lanceolatus streambank wheatgrass Agropyron dasystachyum Agropyron dasystachyum var. riparum Agropyron elmeri Agropyron lanceolatum Agropyron riparum Agropyron riparium Elytrigia dasystachya Elymus lanceolatus var. riparius Elytrigia ripara Elymus subvillosus Elymus multisetus big squirreltail Sitanion jubatum Elymus xpinaloensis [arizonicus x hystrix] xAgrositanion pinaloense Elymus xpseudorepens [lanceolatus x trachycaulus] Agropyron pseudorepens Agropyron pseudorepens var. magnum Agropyron pseudorepens var. sennii Agropyron vaillantianum Elymus pseudorepens Elymus repens quackgrass Agropyron repens Agropyron repens var. subulatum Elytrigia repens Elytrigia repens var. vaillantiana Elytrigia vaillantiana Triticum repens Triticum vaillantianum Elymus xsaundersii pro sp. [elymoides x trachycaulus] xAgrositanion saundersii Agropyron saundersii Elymus saundersii var. californicus Elymus scribneri spreading wheatgrass Agropyron scribneri Elymus trachycaulus slender wheatgrass Elymus trachycaulus ssp. subsecundus slender wheatgrass Agropyron caninum var. unilaterale Agropyron laeve Agropyron pauciflorum var. glaucum Agropyron parishii var. laeve Agropyron pauciflorum ssp. laeve Agropyron subsecundum Agropyron trachycaulum var. ciliatum Agropyron trachycaulum var. glaucum Agropyron trachycaulum var. unilaterale Elymus laevis Elymus trachycaulus ssp. glaucus Elymus trachycaulus var. unilateralis Elymus trachycaulus ssp. trachycaulus slender wheatgrass Agropyron brevifolium Agropyron caninum var. andinum Agropyron caninum var. hornemannii Agropyron caninum ssp. majus Agropyron caninum var. mitchellii Agropyron pauciflorum Agropyron pauciflorum ssp. majus Agropyron pauciflorum ssp. novae-angliae Agropyron pauciflorum var. novae-angliae Agropyron pauciflorum ssp. teslinense Agropyron subsecundum var. andinum Agropyron tenerum Agropyron teslinense Agropyron trachycaulum Agropyron trachycaulum var. majus Agropyron trachycaulum var. novae-angliae Agropyron violaceum var. andinum Agropyron violaceum ssp. andinum Elymus donianus ssp. virescens Elymus pauciflorus Elymus trachycaulus ssp. andinus Elymus trachycaulus var. andinus Elymus trachycaulus var. majus Elymus trachycaulus ssp. novae-angliae Elymus trachycaulus ssp. teslinensis Roegneria pauciflora Roegneria trachycaula Triticum trachycaulum Elymus virginicus Virginia wildrye Elymus virginicus var. virginicus Virginia wildrye Elymus australis Elymus glabriflorus Elymus glabriflorus var. australis Elymus hirsutiglumis Elymus jejunus Elymus striatus Elymus virginicus var. australis Elymus virginicus var. glabriflorus Elymus virginicus var. hirsutiglumis Elymus virginicus var. intermedius Elymus virginicus var. jejunus Elytraria scalystem Elytraria imbricata purple scalystem Justicia imbricata Emmenanthe whisperingbells Emmenanthe penduliflora whisperingbells Emmenanthe penduliflora var. penduliflora whisperingbells Encelia brittlebush Encelia californica California brittlebush Encelia farinosa goldenhills Encelia farinosa var. farinosa goldenhills Encelia farinosa var. phenicodonta goldenhills Encelia frutescens button brittlebush Encelia frutescens var. frutescens button brittlebush Simsia frutescens Encelia frutescens var. resinosa button brittlebush Encelia virginensis Virgin River brittlebush Encelia virginensis var. actonii Acton's brittlebush Encelia actonii Encelia frutescens var. actonii Encelia virginensis ssp. actonii Encelia virginensis var. virginensis Virgin River brittlebush Encelia frutescens var. virginensis Enceliopsis sunray Enceliopsis argophylla silverleaf sunray Tithonia argophylla Enceliopsis nudicaulis nakedstem sunray Enceliopsis nudicaulis var. nudicaulis nakedstem sunray Encelia nudicaulis Engelmannia Engelmann's daisy Engelmannia peristenia Engelmann's daisy Engelmannia pinnatifida Enneapogon feather pappusgrass Enneapogon desvauxii nineawn pappusgrass Pappophorum wrightii Enneapogon mollis soft feather pappusgrass Enteropogon unbrellagrass Enteropogon chlorideus buryseed umbrellagrass Chloris chloridea Dinebra chloridea Ephedra jointfir Ephedra xarenicola [torreyana x viridis] Ephedra aspera rough jointfir Ephedra nevadensis var. aspera Ephedra reedii Ephedra californica California jointfir Ephedra cutleri Cutler's jointfir Ephedra coryi var. viscida Ephedra viridis var. viscida Ephedra fasciculata Arizona jointfir Ephedra clokeyi Ephedra fasciculata var. clokeyi Ephedra funerea Death Valley jointfir Ephedra californica var. funerea Ephedra nevadensis Nevada jointfir Ephedra torreyana Torrey's jointfir Ephedra torreyana var. torreyana Torrey's jointfir Ephedra trifurca longleaf jointfir Ephedra viridis mormon tea Epilobium willowherb Epilobium brachycarpum tall annual willowherb Epilobium paniculatum Epilobium paniculatum var. hammondii Epilobium paniculatum var. juncundum Epilobium paniculatum var. laevicaule Epilobium paniculatum var. subulatum Epilobium paniculatum var. tracyi Epilobium canum hummingbird trumpet Epilobium canum ssp. garrettii Garrett's firechalice Epilobium canum var. garrettii Zauschneria garrettii Zauschneria latifolia var. garrettii Epilobium canum ssp. latifolium hummingbird trumpet Epilobium canum var. latifolium Zauschneria californica ssp. latifolia Zauschneria latifolia Zauschneria latifolia var. arizonica Epilobium ciliatum fringed willowherb Epilobium ciliatum ssp. ciliatum fringed willowherb Epilobium adenocaulon Epilobium adenocaulon var. ecomosum Epilobium adenocaulon var. holosericeum Epilobium adenocaulon var. parishii Epilobium adenocaulon var. perplexans Epilobium americanum Epilobium brevistylum Epilobium brevistylum var. ursinum Epilobium californicum Epilobium californicum var. holosericeum Epilobium ciliatum var. ecomosum Epilobium delicatum Epilobium ecomosum Epilobium glandulosum var. adenocaulon Epilobium glandulosum var. ecomosum Epilobium glandulosum var. macounii Epilobium leptocarpum var. macounii Epilobium ursinum Epilobium watsonii var. parishii Epilobium ciliatum ssp. glandulosum fringed willowherb Epilobium adenocaulon var. cinerascens Epilobium adenocaulon var. occidentale Epilobium boreale Epilobium ciliatum var. glandulosum Epilobium glandulosum Epilobium glandulosum var. cardiophyllum Epilobium glandulosum var. occidentale Epilobium watsonii var. occidentale Epilobium densiflorum denseflower willowherb Boisduvalia densiflora Boisduvalia densiflora var. pallescens Boisduvalia densiflora var. salicina Boisduvalia salicina Oenothera densiflora Epilobium foliosum California willowherb Epilobium minutum var. foliosum Epilobium halleanum glandular willowherb Epilobium brevistylum var. subfalcatum Epilobium brevistylum var. tenue Epilobium glandulosum var. tenue Epilobium pringleanum Epilobium pringleanum var. tenue Epilobium hornemannii Hornemann's willowherb Epilobium hornemannii ssp. hornemannii Hornemann's willowherb Epilobium alpinum var. nutans Epilobium lactiflorum milkflower willowherb Epilobium alpinum var. lactiflorum Epilobium hornemannii var. lactiflorum Epilobium oregonense Oregon willowherb Epilobium alpinum var. gracillimum Epilobium pygmaeum smooth spike-primrose Boisduvalia glabella Boisduvalia glabella var. campestris Boisduvalia pygmaea Oenothera glabella Epilobium saximontanum Rocky Mountain willowherb Epilobium drummondii Epilobium glandulosum var. brionense Epilobium scalare Epilobium steckerianum Epipactis helleborine Epipactis gigantea stream orchid Epithelantha pingpong ball cactus Epithelantha micromeris pingpong ball cactus Epithelantha micromeris var. micromeris pingpong ball cactus Mammillaria micromeris Epixiphium epixiphium Epixiphium wislizeni balloonbush Antirrhinum wislizeni Asarina wislizeni Maurandya wislizeni Equisetum horsetail Equisetum arvense field horsetail Equisetum arvense var. alpestre Equisetum arvense var. boreale Equisetum arvense var. campestre Equisetum arvense var. riparium Equisetum calderi Equisetum xferrissii pro sp. [hyemale x laevigatum] Equisetum hyemale var. elatum Equisetum hyemale var. intermedium Equisetum intermedium Equisetum hyemale scouringrush horsetail Equisetum hyemale var. affine scouringrush horsetail Equisetum affine Equisetum hyemale ssp. affine Equisetum hyemale var. californicum Equisetum hyemale var. pseudohyemale Equisetum hyemale var. robustum Equisetum praealtum Equisetum robustum Hippochaete hyemalis Hippochaete hyemalis ssp. affinis Equisetum laevigatum smooth horsetail Equisetum funstonii Equisetum kansanum Equisetum laevigatum ssp. funstonii Hippochaete laevigata Eragrostis lovegrass Eragrostis barrelieri Mediterranean lovegrass Eragrostis cilianensis stinkgrass Eragrostis major Eragrostis megastachya Poa cilianensis Eragrostis curvula weeping lovegrass Eragrostis chloromelas Eragrostis curvula var. conferta Eragrostis echinochloidea African lovegrass Eragrostis intermedia plains lovegrass Eragrostis lehmanniana Lehmann lovegrass Eragrostis lutescens sixweeks lovegrass Eragrostis mexicana Mexican lovegrass Eragrostis mexicana ssp. mexicana Mexican lovegrass Eragrostis neomexicana Poa mexicana Eragrostis mexicana ssp. virescens Mexican lovegrass Eragrostis orcuttiana Eragrostis virescens Eragrostis obtusiflora alkali lovegrass Brizopyrum obtusiflorum Eragrostis pectinacea tufted lovegrass Eragrostis pectinacea var. miserrima desert lovegrass Eragrostis arida Eragrostis tephrosanthos Eragrostis pectinacea var. pectinacea tufted lovegrass Eragrostis caroliniana Eragrostis diffusa Eragrostis purshii Poa pectinacea Eragrostis pilosa Indian lovegrass Eragrostis multicaulis Eragrostis perplexa Eragrostis pilosa var. perplexa Poa pilosa Eragrostis spectabilis purple lovegrass Eragrostis spectabilis var. sparsihirsuta Poa spectabilis Eragrostis superba Wilman lovegrass Eremalche mallow Eremalche exilis white mallow Malvastrum exile Eremalche rotundifolia desert fivespot Malvastrum rotundifolium Eremocrinum eremocrinum Eremocrinum albomarginatum lonely lily Eremopyrum false wheatgrass Eremopyrum triticeum annual wheatgrass Agropyron prostratum Agropyron triticeum Eriastrum woollystar Eriastrum diffusum miniature woollystar Eriastrum diffusum ssp. jonesii Eriastrum eremicum desert woollystar Eriastrum eremicum ssp. eremicum desert woollystar Eriastrum eremicum ssp. yageri Yager's woollystar Ericameria goldenbush Ericameria cervina deer goldenbush Haplopappus cervinus Ericameria cuneata cliff goldenbush Ericameria cuneata var. spathulata cliff goldenbush Haplopappus cuneatus var. spathulatus Ericameria laricifolia turpentine bush Haplopappus laricifolius Ericameria linearifolia narrowleaf goldenbush Haplopappus linearifolius Haplopappus linearifolius ssp. interior Haplopappus linearifolius var. interior Stenotopsis interior Stenotopsis linearifolia Stenotopsis linearifolia var. interior Ericameria nauseosa rubber rabbitbrush Ericameria nauseosa ssp. consimilis rubber rabbitbrush Ericameria nauseosa ssp. consimilis var. arenaria rubber rabbitbrush Chrysothamnus nauseosus ssp. arenarius Chrysothamnus nauseosus var. arenarius Ericameria nauseosa ssp. consimilis var. juncea rubber rabbitbrush Chrysothamnus nauseosus ssp. junceus Chrysothamnus nauseosus var. junceus Ericameria nauseosa ssp. consimilis var. leiosperma rubber rabbitbrush Chrysothamnus nauseosus var. abbreviatus Chrysothamnus nauseosus ssp. leiospermus Chrysothamnus nauseosus var. leiospermus Ericameria nauseosa ssp. consimilis var. nitida rubber rabbitbrush Chrysothamnus nauseosus ssp. nitidus Chrysothamnus nauseosus var. nitidus Ericameria nauseosa ssp. consimilis var. oreophila rubber rabbitbrush Chrysothamnus nauseosus var. artus Chrysothamnus nauseosus ssp. consimilis Chrysothamnus nauseosus var. consimilis Chrysothamnus nauseosus var. oreophilus Chrysothamnus nauseosus ssp. pinifolius Ericameria nauseosa var. arta Ericameria nauseosa ssp. consimilis var. turbinata rubber rabbitbrush Chrysothamnus nauseosus ssp. turbinatus Chrysothamnus nauseosus var. turbinatus Ericameria nauseosa ssp. nauseosa rubber rabbitbrush Ericameria nauseosa ssp. nauseosa var. bigelovii rubber rabbitbrush Chrysothamnus nauseosus ssp. bigelovii Chrysothamnus nauseosus var. bigelovii Ericameria nauseosa ssp. nauseosa var. glabrata rubber rabbitbrush Chrysothamnus graveolens Chrysothamnus nauseosus ssp. graveolens Chrysothamnus nauseosus var. glabratus Chrysothamnus nauseosus var. graveolens Chrysothamnus nauseosus var. petrophilus Ericameria nauseosa ssp. nauseosa var. hololeuca rubber rabbitbrush Chrysothamnus nauseosus var. gnaphalodes Chrysothamnus nauseosus ssp. gnaphalodes Chrysothamnus nauseosus ssp. hololeucus Chrysothamnus nauseosus var. hololeucus Ericameria nauseosa ssp. nauseosa var. latisquamea rubber rabbitbrush Chrysothamnus nauseosus ssp. latisquameus Chrysothamnus nauseosus var. latisquameus Ericameria paniculata Mojave rabbitbrush Chrysothamnus paniculatus Ericameria parryi Parry's rabbitbrush Ericameria parryi var. attenuata Parry's rabbitbrush Chrysothamnus parryi ssp. attenuatus Chrysothamnus parryi var. attenuatus Ericameria parryi var. howardii Parry's rabbitbrush Chrysothamnus howardii Chrysothamnus parryi ssp. howardii Chrysothamnus parryi var. howardii Ericameria parryi var. nevadensis Parry's rabbitbrush Chrysothamnus parryi ssp. nevadensis Chrysothamnus parryi var. nevadensis Ericameria teretifolia green rabbitbrush Chrysothamnus teretifolius Ericameria watsonii Watson's goldenbush Haplopappus watsonii Macronema watsonii Erigeron fleabane Erigeron anchana Sierra Ancha fleabane Erigeron aphanactis rayless shaggy fleabane Erigeron aphanactis var. aphanactis rayless shaggy fleabane Erigeron concinnus var. aphanactis Erigeron arisolius arid throne fleabane Erigeron arizonicus Arizona fleabane Erigeron rusbyi Erigeron bellidiastrum western daisy fleabane Erigeron bellidiastrum var. bellidiastrum western daisy fleabane Erigeron caespitosus tufted fleabane Erigeron caespitosus var. laccoliticus Erigeron canus hoary fleabane Erigeron colomexicanus running fleabane Erigeron divergens var. cinereus Erigeron compositus cutleaf daisy Erigeron compositus var. discoideus Erigeron compositus var. glabratus Erigeron compositus var. multifidus Erigeron compositus var. typicus Erigeron trifidus Erigeron concinnus Navajo fleabane Erigeron concinnus var. concinnus Navajo fleabane Distasis concinna Erigeron brandegeei Erigeron pumilus ssp. concinnoides Erigeron pumilus var. concinnus Erigeron pumilus var. euconcinnoides Erigeron concinnus var. subglaber Navajo fleabane Erigeron perglaber Erigeron pumilus var. subglaber Erigeron consimilis foothill fleabane Erigeron compactus var. consimilis Erigeron divergens spreading fleabane Erigeron divergens var. typicus Erigeron eatonii Eaton's fleabane Erigeron eatonii var. eatonii Eaton's fleabane Erigeron canaani Erigeron eatonii ssp. typicus Erigeron eximius sprucefir fleabane Erigeron superbus Erigeron flagellaris trailing fleabane Erigeron flagellaris var. typicus Erigeron nudiflorus Erigeron formosissimus beautiful fleabane Erigeron formosissimus var. formosissimus beautiful fleabane Erigeron formosissimus var. typicus Erigeron formosissimus var. viscidus beautiful fleabane Erigeron glabellus var. viscidus Erigeron viscidus Erigeron heliographis Heliograph Peak fleabane Erigeron kuschei Chiricahua fleabane Erigeron lemmonii Lemmon's fleabane Erigeron lobatus lobed fleabane Erigeron lonchophyllus shortray fleabane Erigeron lonchophyllus var. laurentianus Erigeron minor Trimorpha lonchophylla Erigeron modestus plains fleabane Erigeron lobatus var. warnockii Erigeron plateauensis Erigeron warnockii Erigeron neomexicanus New Mexico fleabane Erigeron delphiniifolius var. euneomexicanus Erigeron delphiniifolius ssp. neomexicanus Erigeron oreophilus chaparral fleabane Erigeron delphiniifolius var. oreophilus Erigeron oxyphyllus wand fleabane Erigeron piscaticus Fish Creek fleabane Erigeron pringlei Pringle's fleabane Erigeron pumilus shaggy fleabane Erigeron pumilus ssp. pumilus shaggy fleabane Erigeron pumilus ssp. typicus Erigeron saxatilis rock fleabane Erigeron sceptrifer scepterbearing fleabane Erigeron scopulinus Winn Falls fleabane Erigeron simplex onestem fleabane Erigeron speciosus aspen fleabane Erigeron speciosus var. macranthus aspen fleabane Erigeron macranthus Erigeron tener slender fleabane Erigeron ursinus Bear River fleabane Erigeron utahensis Utah fleabane Erigeron utahensis var. sparsifolius Utah fleabane Erigeron utahensis var. utahensis Utah fleabane Erigeron utahensis var. tetrapleuris Erigeron velutipes Chihuahuan fleabane Erigeron versicolor changing fleabane Achaetogeron chihuahuensis Achaetogeron versicolor Erigeron geiseri var. calcicola Erigeron gilensis Erigeron mimegletes Erigeron vreelandii Vreeland's erigeron Erigeron platyphyllus Eriochloa cupgrass Eriochloa acuminata tapertip cupgrass Eriochloa acuminata var. acuminata tapertip cupgrass Eriochloa gracilis Eriochloa lemmonii var. gracilis Eriochloa acuminata var. minor tapertip cupgrass Eriochloa gracilis var. minor Eriochloa punctata var. minor Eriochloa aristata bearded cupgrass Eriochloa contracta prairie cupgrass Eriochloa fatmensis tropical cupgrass Eriochloa nubica Eriochloa procera Panicum fatmense Eriochloa lemmonii canyon cupgrass Eriodictyon yerba santa Eriodictyon angustifolium narrowleaf yerba santa Eriodictyon angustifolium var. amplifolium Eriogonum buckwheat Eriogonum abertianum Abert's buckwheat Eriogonum abertianum var. abertianum Abert's buckwheat Eriogonum abertianum var. gillespiei Eriogonum abertianum var. neomexicanum Eriogonum abertianum var. villosum Eriogonum abertianum var. cyclosepalum Abert's buckwheat Eriogonum cyclosepalum Eriogonum alatum winged buckwheat Eriogonum alatum var. alatum winged buckwheat Eriogonum alatum ssp. triste Eriogonum triste Pterogonum alatum Eriogonum alatum var. mogollense winged buckwheat Eriogonum arizonicum Arizona buckwheat Eriogonum brachypodum Parry's buckwheat Eriogonum deflexum var. brachypodum Eriogonum parryi Eriogonum caespitosum matted buckwheat Eriogonum sphaerocephalum var. sericoleucum Eriogonum capillare San Carlos buckwheat Eriogonum cernuum nodding buckwheat Eriogonum cernuum var. cernuum nodding buckwheat Eriogonum cernuum ssp. tenue Eriogonum cernuum var. tenue Eriogonum corymbosum crispleaf buckwheat Eriogonum corymbosum var. corymbosum crispleaf buckwheat Eriogonum corymbosum var. divaricatum Eriogonum corymbosum var. erectum Eriogonum divergens Eriogonum effusum ssp. durum Eriogonum effusum ssp. salinum Eriogonum salinum Eriogonum corymbosum var. glutinosum crispleaf buckwheat Eriogonum corymbosum var. orbiculatum crispleaf buckwheat Eriogonum effusum ssp. orbiculatum Eriogonum corymbosum var. velutinum crispleaf buckwheat Eriogonum darrovii Darrow's buckwheat Eriogonum davidsonii Davidson's buckwheat Eriogonum molestum var. davidsonii Eriogonum vimineum ssp. juncinellum Eriogonum deflexum flatcrown buckwheat Eriogonum deflexum var. deflexum flatcrown buckwheat Eriogonum clutei Eriogonum deflexum var. turbinatum Eriogonum turbinatum Eriogonum deserticola Colorado Desert buckwheat Eriogonum divaricatum divergent buckwheat Eriogonum ericifolium Yavapai County buckwheat Eriogonum ericifolium var. ericifolium Yavapai County buckwheat Eriogonum mearnsii Eriogonum ericifolium var. pulchrum Yavapai County buckwheat Eriogonum mearnsii var. pulchrum Eriogonum fasciculatum Eastern Mojave buckwheat Eriogonum fasciculatum var. polifolium Eastern Mojave buckwheat Eriogonum fasciculatum ssp. polifolium Eriogonum fasciculatum var. revolutum Eriogonum polifolium Eriogonum gordonii Gordon's buckwheat Eriogonum heermannii Heermann's buckwheat Eriogonum heermannii var. apachense Apache buckwheat Eriogonum apachense Eriogonum heermannii var. argense Heermann's buckwheat Eriogonum heermannii ssp. argense Eriogonum howellii Eriogonum sulcatum var. argense Eriogonum heermannii var. subracemosum Heermann's buckwheat Eriogonum howellii var. subracemosum Eriogonum heermannii var. subspinosum Heermann's buckwheat Eriogonum heermannii var. sulcatum Heermann's buckwheat Eriogonum heermannii ssp. sulcatum Eriogonum sulcatum Eriogonum hieraciifolium hawkweed buckwheat Eriogonum pannosum Eriogonum hookeri Hooker's buckwheat Eriogonum inflatum desert trumpet Eriogonum inflatum var. deflatum desert trumpet Eriogonum inflatum var. inflatum desert trumpet Eriogonum insigne ladder buckwheat Eriogonum deflexum ssp. exaltatum Eriogonum deflexum ssp. insigne Eriogonum exaltatum Eriogonum jamesii James' buckwheat Eriogonum jamesii var. flavescens James' buckwheat Eriogonum arcuatum Eriogonum bakeri Eriogonum jamesii var. higginsii Eriogonum jamesii var. rupicola Eriogonum jamesii var. jamesii James' buckwheat Eriogonum jamesii var. undulatum James' buckwheat Eriogonum undulatum Eriogonum jonesii Jones' buckwheat Eriogonum lachnogynum woollycup buckwheat Eriogonum tetraneuris Eriogonum leptocladon sand buckwheat Eriogonum leptocladon var. leptocladon sand buckwheat Eriogonum effusum var. shandsii Eriogonum leptocladon var. papiliunculi sand buckwheat Eriogonum leptocladon var. ramosissimum sand buckwheat Eriogonum ramosissimum Eriogonum leptophyllum slenderleaf buckwheat Eriogonum effusum var. leptophyllum Eriogonum maculatum spotted buckwheat Eriogonum angulosum ssp. maculatum Eriogonum angulosum var. maculatum Eriogonum cernuum ssp. acutangulum Eriogonum microthecum slender buckwheat Eriogonum microthecum var. laxiflorum slender buckwheat Eriogonum microthecum var. confertiflorum Eriogonum microthecum ssp. confertiflorum Eriogonum microthecum ssp. laxiflorum Eriogonum microthecum var. simpsonii Simpson's buckwheat Eriogonum microthecum var. foliosum Eriogonum microthecum var. friscanum Eriogonum microthecum ssp. intermedium Eriogonum microthecum var. macdougalii Eriogonum simpsonii Eriogonum mortonianum Fredonia buckwheat Eriogonum nidularium birdnest buckwheat Eriogonum vimineum ssp. nidularium Eriogonum nummulare money buckwheat Eriogonum dudleyanum Eriogonum kearneyi Eriogonum kearneyi var. monoense Eriogonum kearneyi ssp. monoense Eriogonum nodosum var. kearneyi Eriogonum nodosum ssp. monoense Eriogonum ovalifolium cushion buckwheat Eriogonum ovalifolium var. ovalifolium cushion buckwheat Eriogonum ovalifolium var. nevadense Eriogonum palmerianum Palmer's buckwheat Eriogonum baileyi var. tomentosum Eriogonum tomentosum Eriogonum parishii mountainmist Eriogonum pharnaceoides wirestem buckwheat Eriogonum pharnaceoides var. cervinum wirestem buckwheat Eriogonum pharnaceoides var. pharnaceoides wirestem buckwheat Eriogonum plumatella yucca buckwheat Eriogonum plumatella var. jaegeri Eriogonum polycladon sorrel buckwheat Eriogonum densum Eriogonum vimineum var. densum Eriogonum pusillum yellowturbans Eriogonum reniforme ssp. pusillum Eriogonum racemosum redroot buckwheat Eriogonum reniforme kidneyleaf buckwheat Eriogonum reniforme var. comosum Eriogonum ripleyi Fraziers Well buckwheat Eriogonum rotundifolium roundleaf buckwheat Eriogonum shockleyi Shockley's buckwheat Eriogonum shockleyi var. shockleyi Shockley's buckwheat Eriogonum shockleyi ssp. candidum Eriogonum shockleyi var. longilobum Eriogonum shockleyi ssp. longilobum Eriogonum subreniforme kidneyshape buckwheat Eriogonum filicaule Eriogonum thomasii Thomas' buckwheat Eriogonum thompsoniae Thompson's buckwheat Eriogonum thompsoniae var. albiflorum Thompson's buckwheat Eriogonum corymbosum var. albiflorum Eriogonum thompsoniae var. atwoodii Atwood's buckwheat Eriogonum corymbosum var. atwoodii Eriogonum thompsoniae var. thompsoniae Thompson's buckwheat Eriogonum corymbosum var. thompsoniae Eriogonum thurberi Thurber's buckwheat Eriogonum trichopes little deserttrumpet Eriogonum trichopes var. trichopes little deserttrumpet Eriogonum trichopes ssp. minus Eriogonum umbellatum sulphur-flower buckwheat Eriogonum umbellatum var. cognatum sulphur-flower buckwheat Eriogonum cognatum Eriogonum umbellatum var. juniporinum juniper buckwheat Eriogonum umbellatum var. subaridum sulphur-flower buckwheat Eriogonum umbellatum ssp. ferrissii Eriogonum umbellatum ssp. subaridum Eriogonum wetherillii Wetherill's buckwheat Eriogonum sessile Eriogonum wrightii bastardsage Eriogonum wrightii var. pringlei Pringle's bastardsage Eriogonum pringlei Eriogonum wrightii var. wrightii bastardsage Eriogonum wrightii ssp. glomerulum Eriogonum zionis Zion buckwheat Eriogonum zionis var. coccineum Zion buckwheat Eriogonum racemosum var. coccineum Eriogonum zionis var. zionis Zion buckwheat Eriogonum racemosum var. nobile Eriogonum racemosum var. zionis Erioneuron woollygrass Erioneuron avenaceum shortleaf woollygrass Erioneuron avenaceum var. grandiflorum Erioneuron grandiflorum Tridens grandiflorus Erioneuron pilosum hairy woollygrass Tridens pilosus Uralepis pilosa Eriophyllum woolly sunflower Eriophyllum multicaule manystem woolly sunflower Eriophyllum pringlei Pringle's woolly sunflower Erodium stork's bill Erodium cicutarium redstem stork's bill Erodium cicutarium ssp. cicutarium redstem stork's bill Erodium moschatum musky stork's bill Erodium moschatum var. moschatum musky stork's bill Erodium texanum Texas stork's bill Errazurizia dunebroom Errazurizia rotundata roundleaf dunebroom Parryella rotundata Eruca rocketsalad Eruca vesicaria rocketsalad Eruca vesicaria ssp. sativa rocketsalad Brassica eruca Eruca eruca Eruca sativa Raphanus eruca Eryngium eryngo Eryngium heterophyllum Wright's eryngo Eryngium wrightii Eryngium lemmonii Chiricahua Mountain eryngo Eryngium nasturtiifolium hierba del sapo Eryngium phyteumae Huachuca Mountain eryngo Eryngium sparganophyllum Arizona eryngo Erysimum wallflower Erysimum capitatum sanddune wallflower Erysimum capitatum var. capitatum sanddune wallflower Cheirinia aspera Erysimum arkansanum Erysimum asperum Erysimum asperum var. arkansanum Erysimum asperum var. capitatum Erysimum capitatum var. stellatum Erysimum capitatum var. washoense Erysimum elatum Erysimum moniliforme Erysimum wheeleri Erysimum capitatum var. purshii Pursh's wallflower Erysimum amoenum Erysimum argillosum Erysimum asperrimum Erysimum asperum var. amoenum Erysimum asperum var. purshii Erysimum capitatum var. argillosum Erysimum capitatum var. amoenum Erysimum desertorum Erysimum nivale Erysimum inconspicuum shy wallflower Cheirinia inconspicua Erysimum parviflorum Erysimum repandum spreading wallflower Cheirinia repanda Erythrina erythrina Erythrina flabelliformis coralbean Eschscholzia California poppy Eschscholzia californica California poppy Eschscholzia californica ssp. californica California poppy Eschscholzia californica var. crocea Eschscholzia californica var. douglasii Eschscholzia californica var. maritima Eschscholzia californica var. peninsularis Eschscholzia procera Eschscholzia californica ssp. mexicana California poppy Eschscholzia mexicana Eschscholzia glyptosperma desert poppy Eschscholzia minutiflora pygmy poppy Eschscholzia minutiflora ssp. minutiflora pygmy poppy Escobaria foxtail cactus Escobaria alversonii cushion foxtail cactus Coryphantha alversonii Coryphantha vivipara var. alversonii Escobaria vivipara var. alversonii Mammillaria alversonii Escobaria missouriensis Missouri foxtail cactus Escobaria missouriensis var. marstonii Marston's foxtail cactus Coryphantha missouriensis var. marstonii Escobaria missouriensis var. missouriensis Missouri foxtail cactus Coryphantha missouriensis Mammillaria missouriensis Neobesseya missouriensis Neobesseya wissmannii Escobaria orcuttii Orcutt's foxtail cactus Coryphantha strobiliformis var. durispina Coryphantha strobiliformis var. orcuttii Escobaria orcuttii var. koenigii Escobaria orcuttii var. macraxima Escobaria robbinsiorum Cochise foxtail cactus Coryphantha robbinsiorum Cochiseia robbinsiorum Escobaria tuberculosa whitecolumn foxtail cactus Coryphantha dasyacantha var. varicolor Coryphantha strobiliformis Escobaria dasyacantha var. varicolor Escobaria strobiliformis Escobaria tuberculosa var. varicolor Mammillaria tuberculosa Mammillaria varicolor Escobaria vivipara spinystar Escobaria vivipara var. arizonica Arizona spinystar Coryphantha arizonica Coryphantha vivipara var. arizonica Mammillaria arizonica Mammillaria vivipara var. arizonica Escobaria vivipara var. bisbeeana Bisbee spinystar Coryphantha bisbeeana Coryphantha vivipara var. bisbeeana Escobaria vivipara var. buoflama spinystar Coryphantha vivipara var. buoflama Escobaria vivipara var. deserti desert spinystar Coryphantha deserti Coryphantha vivipara var. deserti Mammillaria deserti Mammillaria vivipara var. deserti Escobaria vivipara var. kaibabensis Kaibab spinystar Coryphantha vivipara var. kaibabensis Escobaria vivipara var. rosea spinystar Coryphantha vivipara var. rosea Escobaria vivipara var. vivipara spinystar Coryphantha vivipara Mammillaria vivipara Mammillaria vivipara var. borealis Eucnide stingbush Eucnide rupestris rock nettle Sympetaleia rupestris Eucnide urens desert stingbush Eucrypta hideseed Eucrypta chrysanthemifolia spotted hideseed Eucrypta chrysanthemifolia var. bipinnatifida spotted hideseed Eucrypta micrantha dainty desert hideseed Eupatorium thoroughwort Eupatorium maculatum spotted joepyeweed Eupatorium maculatum var. bruneri spotted joepyeweed Eupatorium bruneri Eupatoriadelphus maculatus var. bruneri Eupatorium maculatum ssp. bruneri Euphorbia spurge Euphorbia aaron-rossii Marble Canyon spurge Euphorbia bilobata blackseed spurge Euphorbia brachycera horned spurge Euphorbia brachycera var. robusta Euphorbia lurida Euphorbia montana Euphorbia odontadenia Euphorbia robusta Tithymalus brachycera Tithymalus montanus Tithymalus robustus Euphorbia chamaesula mountain spurge Tithymalus chamaesula Euphorbia crenulata Chinese caps Tithymalus crenulatus Euphorbia cuphosperma Euphorbia dentata var. cuphosperma Poinsettia cuphosperma Poinsettia dentata var. cuphosperma Euphorbia cyathophora fire on the mountain Euphorbia barbellata Euphorbia graminifolia Euphorbia havanensis Euphorbia heterophylla var. barbellata Euphorbia heterophylla var. cyathophora Euphorbia heterophylla var. graminifolia Poinsettia barbellata Poinsettia cyathophora Poinsettia cyathophora var. graminifolia Poinsettia graminifolia Poinsettia havanensis Euphorbia davidii David's spurge Euphorbia dentata Euphorbia dentata var. gracillima Euphorbia dentata var. lancifolia Euphorbia dentata toothed spurge Euphorbia dentata var. dentata toothed spurge Anisophyllum dentatum Euphorbia dentata var. linearis Euphorbia dentata var. rigida Euphorbia herronii Poinsettia dentata Euphorbia eriantha beetle spurge Euphorbia esula leafy spurge Euphorbia esula var. esula leafy spurge Euphorbia intercedens Euphorbia pseudovirgata Galarhoeus esula Tithymalus esula Euphorbia exstipulata squareseed spurge Euphorbia exstipulata var. lata Euphorbia heterophylla Mexican fireplant Euphorbia geniculata Euphorbia prunifolia Poinsettia geniculata Poinsettia heterophylla Euphorbia incisa Mojave spurge Euphorbia incisa var. incisa Mojave spurge Tithymalus incisa Euphorbia incisa var. mollis Mojave spurge Tithymalus incisa var. mollis Euphorbia lathyris moleplant Euphorbia lathyrus Galarhoeus lathyris Tithymalus lathyris Euphorbia macropus Huachuca Mountain spurge Euphorbia plummerae Euphorbia marginata snow on the mountain Agaloma marginata Dichrophyllum marginatum Lepadena marginata Euphorbia palmeri woodland spurge Euphorbia palmeri var. palmeri woodland spurge Euphorbia palmeri var. subpubens woodland spurge Euphorbia peplus petty spurge Galarhoeus peplus Tithymalus peplus Euphorbia radians sun spurge Poinsettia radians Euphorbia spathulata warty spurge Euphorbia alta Euphorbia arkansana Euphorbia dictyosperma Euphorbia obtusata Galarhoeus arkansanus Galarhoeus obtusatus Tithymalus arkansanus Tithymalus missouriensis Tithymalus obtusatus Tithymalus spathulatus Eurybia aster Eurybia glauca gray aster Aster glaucus Aster glaucodes Aster glaucodes var. formosus Eucephalus formosus Eucephalus glaucus Eurybia pulchra beautiful aster Aster glaucodes ssp. pulcher Aster glaucodes var. pulcher Euryops euryops Euryops multifidus hawk's eye Euryops subcarnosus ssp. vulgaris Eustoma prairie gentian Eustoma exaltatum catchfly prairie gentian Eustoma exaltatum ssp. exaltatum catchfly prairie gentian Eustoma barkleyi Euthamia goldentop Euthamia occidentalis western goldentop Euthamia californica Euthamia linearifolia Solidago occidentalis Evax pygmy cudweed Evax verna spring pygmycudweed Evax verna var. verna spring pygmycudweed Diaperia multicaulis Evax multicaulis Filaginopsis multicaulis Filago nivea Filago verna Evolvulus dwarf morning-glory Evolvulus alsinoides slender dwarf morning-glory Evolvulus alsinoides var. angustifolius slender dwarf morning-glory Evolvulus alsinoides var. acapulcensis Evolvulus alsinoides var. grisebachianus Evolvulus alsinoides var. hiticaulis Evolvulus alsinoides var. linifolius Evolvulus linifolius Evolvulus arizonicus wild dwarf morning-glory Evolvulus arizonicus var. laetus Evolvulus laetus Evolvulus nuttallianus shaggy dwarf morning-glory Evolvulus pilosus Evolvulus sericeus silver dwarf morning-glory Evolvulus sericeus var. sericeus silver dwarf morning-glory Evolvulus sericeus var. discolor Eysenhardtia kidneywood Eysenhardtia orthocarpa Tahitian kidneywood Eysenhardtia polystachya Mexican kidneywood Fagonia fagonbush Fagonia laevis California fagonbush Fagonia californica ssp. laevis Fagonia californica var. laevis Fagonia californica var. longipes Fagonia longipes Fagonia pachyacantha sticky fagonbush Fagonia californica var. glutinosa Fagopyrum buckwheat Fagopyrum esculentum buckwheat Fagopyrum fagopyrum Fagopyrum sagittatum Fagopyrum vulgare Polygonum fagopyrum Fallugia Apache plume Fallugia paradoxa Apache plume Fendlera fendlerbush Fendlera rupicola cliff fendlerbush Fendlera rupicola var. falcata Fendlera wrightii Wright's fendlerbush Fendlera rupicola var. wrightii Fendlerella fendlerbush Fendlerella utahensis Utah fendlerbush Fendlerella utahensis var. cymosa Utah fendlerbush Fendlerella utahensis var. utahensis Utah fendlerbush Ferocactus barrel cactus Ferocactus cylindraceus California barrel cactus Ferocactus cylindraceus var. cylindraceus California barrel cactus Echinocactus acanthodes Ferocactus acanthodes Ferocactus cylindraceus var. eastwoodiae California barrel cactus Ferocactus acanthodes var. eastwoodiae Ferocactus eastwoodiae Ferocactus cylindraceus var. lecontei Leconte's barrel cactus Echinocactus lecontei Ferocactus acanthodes var. lecontei Ferocactus lecontei Ferocactus emoryi Emory's barrel cactus Ferocactus covillei Ferocactus wislizeni candy barrelcactus Echinocactus wislizeni Festuca fescue Festuca arizonica Arizona fescue Festuca brachyphylla alpine fescue Festuca brachyphylla ssp. coloradensis Colorado fescue Festuca brachyphylla ssp. breviculmis Festuca ovina var. brevifolia Festuca calligera southwest fescue Festuca earlei Earle's fescue Festuca brevifolia var. utahensis Festuca idahoensis Idaho fescue Festuca idahoensis var. oregona Festuca ingrata Festuca occidentalis var. ingrata Festuca occidentalis var. oregona Festuca ovina var. columbiana Festuca ovina var. ingrata Festuca ovina var. oregona Festuca minutiflora smallflower fescue Festuca brachyphylla var. endotera Festuca ovina var. minutiflora Festuca rubra red fescue Festuca saximontana Rocky Mountain fescue Festuca saximontana var. saximontana Rocky Mountain fescue Festuca brachyphylla var. rydbergii Festuca ovina var. rydbergii Festuca ovina var. saximontana Festuca sororia ravine fescue Festuca thurberi Thurber's fescue Filago cottonrose Filago arizonica Arizona cottonrose Oglifa arizonica Filago californica California cottonrose Oglifa californica Filago depressa dwarf cottonrose Oglifa depressa Fimbristylis fimbry Fimbristylis annua annual fimbry Fimbristylis alamosana Fimbristylis baldwiniana Fimbristylis laxa Scirpus annuus Fimbristylis thermalis hot springs fimbry Fimbristylis spadicea Scirpus spadiceus Fimbristylis vahlii Vahl's fimbry Scirpus vahlii Fingerhuthia Zulu fescue Fingerhuthia africana Zulu fescue Flaveria yellowtops Flaveria campestris alkali yellowtops Flaveria macdougalii Macdougal's yellowtops Flaveria trinervia clustered yellowtops Oedera trinervia Fleischmannia thoroughwort Fleischmannia incarnata pink thoroughwort Eupatorium incarnatum Fleischmannia pycnocephala lavender thoroughwort Eupatorium pycnocephalum Fleischmannia sonorae Sonoran thoroughwort Eupatorium sonorae Flourensia tarwort Flourensia cernua American tarwort Foeniculum fennel Foeniculum vulgare sweet fennel Foeniculum foeniculum Forestiera swampprivet Forestiera pubescens stretchberry Forestiera pubescens var. pubescens stretchberry Forestiera acuminata var. parviflora Forestiera neomexicana Forestiera neomexicana var. arizonica Forestiera pubescens ssp. neomexicana Forestiera pubescens var. neomexicana Forestiera sphaerocarpa Forestiera shrevei desert olive Forestiera phillyreoides Fouquieria ocotillo Fouquieria splendens ocotillo Fragaria strawberry Fragaria vesca woodland strawberry Fragaria vesca ssp. americana woodland strawberry Fragaria americana Fragaria vesca var. americana Fragaria vesca ssp. bracteata woodland strawberry Fragaria bracteata Fragaria helleri Fragaria vesca var. bracteata Fragaria virginiana Virginia strawberry Fragaria virginiana ssp. glauca Virginia strawberry Fragaria glauca Fragaria multicipita Fragaria ovalis Fragaria pauciflora Fragaria virginiana var. glauca Fragaria virginiana var. ovalis Fragaria virginiana var. terrae-novae Fragaria virginiana ssp. platypetala Virginia strawberry Fragaria platypetala Fragaria platypetala var. sibbaldifolia Fragaria sibbaldifolia Fragaria suksdorfii Fragaria truncata Fragaria virginiana var. platypetala Frangula buckthorn Frangula betulifolia beechleaf frangula Frangula betulifolia ssp. betulifolia beechleaf frangula Rhamnus betulifolia Frangula betulifolia ssp. obovata obovate buckthorn Rhamnus betulifolia var. obovata Frangula xblumeri pro sp. [betulifolia x californica] Rhamnus blumeri Frangula californica California buckthorn Frangula californica ssp. ursina California buckthorn Rhamnus californica ssp. ursina Rhamnus californica var. ursina Rhamnus tomentella ssp. ursina Frasera green gentian Frasera albomarginata desert frasera Frasera albomarginata var. induta Leucocraspedum albomarginatum Swertia albomarginata Frasera paniculata tufted frasera Swertia utahensis Frasera parryi Coahuila frasera Swertia parryi Frasera speciosa elkweed Frasera angustifolia Frasera macrophylla Frasera speciosa var. angustifolia Frasera speciosa var. stenosepala Frasera stenosepala Swertia radiata Swertia radiata var. macrophylla Tesseranthium angustifolium Tesseranthium macrophyllum Tesseranthium radiatum Fraxinus ash Fraxinus anomala singleleaf ash Fraxinus anomala var. anomala singleleaf ash Fraxinus anomala var. lowellii singleleaf ash Fraxinus lowellii Fraxinus cuspidata fragrant ash Fraxinus cuspidata var. macropetala Fraxinus dipetala California ash Fraxinus dipetala var. trifoliolata Fraxinus jonesii Fraxinus trifoliolata Fraxinus gooddingii Goodding's ash Fraxinus greggii Gregg's ash Fraxinus papillosa Chihuahuan ash Fraxinus velutina velvet ash Fraxinus pennsylvanica ssp. velutina Fraxinus velutina var. coriacea Fraxinus velutina var. glabra Fraxinus velutina var. toumeyi Fremontodendron flannelbush Fremontodendron californicum California flannelbush Fremontia californica Fremontodendron californicum ssp. crassifolium Fremontia californica ssp. crassifolia Fremontia californica var. diegensis Fremontia californica var. integra Fremontodendron californicum ssp. napense Fremontia californica var. napensis Fremontia californica ssp. obispoensis Fremontodendron californicum ssp. obispoense Fremontia californica var. typica Fremontia californica var. viridis Fremontia crassifolia Fremontia napensis Fremontia obispoensis Fritillaria fritillary Fritillaria atropurpurea spotted fritillary Fritillaria adamantina Fritillaria gracillima Froelichia snakecotton Froelichia arizonica Arizona snakecotton Froelichia gracilis slender snakecotton Froelichia braunii Oplotheca gracilis Froelichia interrupta Texas snakecotton Fuirena umbrella-sedge Fuirena simplex western umbrella-sedge Fuirena simplex var. simplex western umbrella-sedge Fumaria fumitory Fumaria occidentalis western fumitory Fumaria parviflora fineleaf fumitory Funastrum twinevine Funastrum crispum wavyleaf twinevine Sarcostemma crispum Sarcostemma lobata Funastrum cynanchoides fringed twinevine Funastrum cynanchoides ssp. cynanchoides fringed twinevine Funastrum cynanchoides var. subtruncatum Sarcostemma cynanchoides Funastrum cynanchoides ssp. heterophyllum Hartweg's twinevine Funastrum heterophyllum Funastrum lineare Philibertia heterophylla Sarcostemma cynanchoides var. hartwegii Sarcostemma cynanchoides ssp. hartwegii Funastrum hirtellum hairy milkweed Philibertia hirtella Sarcostemma hirtellum Gaillardia blanketflower Gaillardia aristata common gaillardia Gaillardia arizonica Arizona blanketflower Gaillardia arizonica var. arizonica Arizona blanketflower Gaillardia arizonica var. pringlei Pringle's blanketflower Gaillardia pringlei Gaillardia multiceps onion blanketflower Gaillardia multiceps var. multiceps onion blanketflower Gaillardia parryi Parry's blanketflower Gaillardia pinnatifida red dome blanketflower Gaillardia pinnatifida var. linearis red dome blanketflower Gaillardia pinnatifida var. pinnatifida red dome blanketflower Gaillardia gracilis Gaillardia mearnsii Gaillardia pulchella firewheel Gaillardia pulchella var. pulchella firewheel Gaillardia drummondii Gaillardia neomexicana Gaillardia villosa Galactia milkpea Galactia wrightii Wright's milkpea Galactia wrightii var. mollissima Wright's milkpea Galactia wrightii var. wrightii Wright's milkpea Galinsoga gallant-soldier Galinsoga parviflora gallant-soldier Galinsoga parviflora var. semicalva Galinsoga semicalva Galinsoga semicalva var. percalva Galium bedstraw Galium aparine stickywilly Galium agreste var. echinospermum Galium aparine var. echinospermum Galium aparine var. intermedium Galium aparine var. minor Galium aparine var. vaillantii Galium spurium var. echinospermum Galium spurium var. vaillantii Galium spurium var. vaillantii Galium vaillantii Galium bifolium twinleaf bedstraw Galium boreale northern bedstraw Galium boreale var. hyssopifolium Galium boreale var. intermedium Galium boreale var. linearifolium Galium boreale ssp. septentrionale Galium boreale ssp. septentrionale Galium boreale var. scabrum Galium boreale var. typicum Galium hyssopifolium Galium septentrionale Galium strictum Galium collomiae Fossil Hill Creek bedstraw Galium coloradoense Colorado bedstraw Galium multiflorum var. coloradoense Galium fendleri Fendler's bedstraw Galium magnifolium largeleaf bedstraw Galium matthewsii var. magnifolium Galium mexicanum Mexican bedstraw Galium mexicanum ssp. asperrimum Mexican bedstraw Galium asperrimum Galium mexicanum var. asperrimum Galium mexicanum ssp. mexicanum Mexican bedstraw Galium microphyllum bracted bedstraw Relbunium microphyllum Galium munzii Munz's bedstraw Galium munzii ssp. ambivalens Munz's bedstraw Galium munzii ssp. munzii Munz's bedstraw Galium proliferum limestone bedstraw Galium proliferum var. subnudum Galium virgatum var. diffusum Galium stellatum starry bedstraw Galium stellatum ssp. eremicum starry bedstraw Galium stellatum var. eremicum Galium trifidum threepetal bedstraw Galium trifidum ssp. subbiflorum threepetal bedstraw Galium brandegeei Galium claytonii var. subbiflorum Galium subbiflorum Galium tinctorium var. subbiflorum Galium trifidum var. pusillum Galium trifidum var. subbiflorum Galium triflorum fragrant bedstraw Galium brachiatum Galium pennsylvanicum Galium triflorum var. asprelliforme Galium triflorum var. viridiflorum Galium uncinulatum bristly bedstraw Galium uncinulatum var. obstipum Galium wrightii Wright's bedstraw Galium frankliniense Galium rothrockii Galium wrightii var. rothrockii Gamochaeta everlasting Gamochaeta falcata narrowleaf purple everlasting Gamochaeta calviceps Gnaphalium calviceps Gnaphalium falcatum Gnaphalium purpureum var. falcatum Gamochaeta purpurea spoonleaf purple everlasting Gnaphalium purpureum Garrya silktassel Garrya flavescens ashy silktassel Garrya flavescens ssp. pallida Garrya flavescens var. pallida Garrya wrightii Wright's silktassel Gastridium nit grass Gastridium phleoides nit grass Agrostis ventricosa Gastridium ventricosum Gaura beeblossom Gaura coccinea scarlet beeblossom Gaura coccinea var. arizonica Gaura coccinea var. epilobioides Gaura coccinea var. glabra Gaura coccinea var. parvifolia Gaura coccinea var. typica Gaura glabra Gaura odorata Gaura hexandra harlequinbush Gaura hexandra ssp. gracilis harlequinbush Gaura gracilis Gaura gracilis var. typica Gaura mollis velvetweed Gaura parviflora Gaura parviflora var. lachnocarpa Gaura parviflora var. typica Gayophytum groundsmoke Gayophytum decipiens deceptive groundsmoke Gayophytum diffusum spreading groundsmoke Gayophytum diffusum ssp. parviflorum spreading groundsmoke Gayophytum diffusum var. strictipes Gayophytum helleri var. erosulatum Gayophytum intermedium Gayophytum lasiospermum Gayophytum lasiospermum var. hoffmannii Gayophytum nuttallii var. abramsii Gayophytum nuttallii var. intermedium Gayophytum racemosum blackfoot groundsmoke Gayophytum helleri Gayophytum helleri var. glabrum Gayophytum humile var. hirtellum Gayophytum racemosum var. caesium Gayophytum ramosissimum pinyon groundsmoke Gentiana gentian Gentiana affinis pleated gentian Dasystephana affinis Dasystephana interrupta Gentiana affinis var. bigelovii Gentiana affinis var. forwoodii Gentiana affinis var. major Gentiana affinis var. ovata Gentiana affinis var. parvidentata Gentiana bigelovii Gentiana forwoodii Gentiana interrupta Gentiana oregana Gentiana rusbyi Pneumonanthe affinis Gentiana fremontii moss gentian Chondrophylla aquatica Chondrophylla fremontii Ciminalis fremontii Gentiana aquatica Gentianella dwarf gentian Gentianella amarella autumn dwarf gentian Gentianella amarella ssp. acuta autumn dwarf gentian Amarella acuta Amarella plebeja Amarella plebeja var. holmii Amarella strictiflora Gentiana acuta Gentianella acuta Gentiana amarella Gentiana amarella ssp. acuta Gentianella amarella var. acuta Gentiana amarella var. acuta Gentiana amarella var. plebeja Gentiana amarella var. stricta Gentiana plebeja Gentiana plebeja var. holmii Gentianella strictiflora Gentiana strictiflora Gentianella amarella ssp. heterosepala autumn dwarf gentian Amarella scopulorum Gentiana amarella ssp. heterosepala Gentianella amarella var. heterosepala Gentiana heterosepala Gentianella heterosepala Gentiana scopulorum Gentianella microcalyx Chiricahua dwarf gentian Gentiana microcalyx Gentianella tenella Dane's dwarf gentian Gentianella tenella ssp. tenella Dane's dwarf gentian Comastoma tenellum Gentiana tenella Gentianella wislizeni Chiricahua Mountain dwarf gentian Gentiana wislizeni Gentianella wrightii Wright's dwarf gentian Gentianella amarella ssp. wrightii Gentiana wrightii Gentianopsis fringed gentian Gentianopsis barbellata perennial fringed gentian Gentianella barbellata Gentiana barbellata Gentianopsis macrantha grand fringed gentian Gentianella detonsa ssp. superba Gentiana grandis Geraea desertsunflower Geraea canescens hairy desertsunflower Geraea canescens var. canescens hairy desertsunflower Geraea canescens var. paniculata hairy desertsunflower Geranium geranium Geranium atropurpureum western purple cranesbill Geranium atropurpureum var. atropurpureum western purple cranesbill Geranium caespitosum ssp. atropurpureum Geranium marginale Geranium toquimense Geranium caespitosum pineywoods geranium Geranium caespitosum var. caespitosum pineywoods geranium Geranium caespitosum var. eremophilum purple cluster geranium Geranium eremophilum Geranium caespitosum var. fremontii Fremont's geranium Geranium fremontii Geranium caespitosum var. parryi Parry's geranium Geranium fremontii var. parryi Geranium parryi Geranium carolinianum Carolina geranium Geranium carolinianum var. carolinianum Carolina geranium Geranium carolinianum var. confertiflorum Geranium lentum Mogollon geranium Geranium richardsonii Richardson's geranium Geranium wislizeni Huachuca Mountain geranium Geum avens Geum aleppicum yellow avens Geum aleppicum var. strictum Geum aleppicum ssp. strictum Geum strictum Geum strictum var. decurrens Geum macrophyllum largeleaf avens Geum macrophyllum var. perincisum largeleaf avens Geum macrophyllum ssp. perincisum Geum macrophyllum var. rydbergii Geum oregonense Geum perincisum Geum perincisum var. intermedium Geum rossii Ross' avens Geum rossii var. turbinatum Ross' avens Acomastylis rossii ssp. turbinata Geum gracilipes Geum turbinatum Sieversia gracilipes Geum triflorum old man's whiskers Geum triflorum var. ciliatum old man's whiskers Erythrocoma ciliata Geum ciliatum Sieversia ciliata Gilia gilia Gilia achilleifolia California gilia Gilia achilleifolia ssp. multicaulis California gilia Gilia multicaulis Gilia multicaulis var. alba Gilia multicaulis ssp. pedunculata Gilia clivorum purplespot gilia Gilia clokeyi Clokey's gilia Gilia filiformis yellow gilia Gilia flavocincta lesser yellowthroat gilia Gilia flavocincta ssp. australis lesser yellowthroat gilia Gilia ophthalmoides ssp. australis Gilia flavocincta ssp. flavocincta lesser yellowthroat gilia Gilia ophthalmoides ssp. flavocincta Gilia hutchinsifolia desert pale gilia Gilia leptomeria ssp. rubella Gilia latifolia broadleaf gilia Gilia latifolia var. latifolia broadleaf gilia Gilia leptomeria sand gilia Gilia lottiae Lott's gilia Gilia mexicana El Paso gilia Gilia minor little gilia Gilia ophthalmoides eyed gilia Gilia rigidula bluebowls Gilia rigidula ssp. acerosa bluebowls Gilia acerosa Gilia rigidula var. acerosa Giliastrum rigidulum ssp. acerosum Gilia scopulorum rock gilia Gilia sinuata rosy gilia Gilia inconspicua var. sinuata Gilia stellata star gilia Gilia subacaulis pinyon gilia Gilia subnuda coral gilia Gilia subnuda ssp. superba Gilia transmontana transmontane gilia Gilia ochroleuca ssp. transmontana Gilia triodon coyote gilia Glandularia mock vervain Glandularia bipinnatifida Dakota mock vervain Glandularia bipinnatifida var. bipinnatifida Dakota mock vervain Verbena ambrosiifolia Verbena bipinnatifida Verbena bipinnatifida var. latilobata Verbena ciliata Verbena ciliata var. longidentata Verbena ciliata var. pubera Verbena demareei Verbena pubera Glandularia bipinnatifida var. brevispicata Dakota mock vervain Verbena bipinnatifida var. brevispicata Glandularia chiricahensis Chiricahua Mountain mock vervain Verbena chiricahensis Glandularia elegans mountain mock vervain Glandularia elegans var. asperata mountain mock vervain Verbena elegans var. asperata Glandularia elegans var. elegans mountain mock vervain Glandularia gooddingii southwestern mock vervain Verbena arizonica Verbena gooddingii Verbena gooddingii var. nepetifolia Verbena verna Verbena verna var. fissa Glandularia xhybrida [peruviana x phlogiflora or platensis] Verbena hybrida Glandularia pulchella South American mock vervain Glandularia tenuisecta Verbena pulchella Verbena pulchella var. gracilior Verbena tenuisecta Verbena tenuisecta var. alba Glinus sweetjuice Glinus radiatus spreading sweetjuice Mollugo radiata Glossopetalon greasebush Glossopetalon spinescens spiny greasebush Glossopetalon spinescens var. aridum spiny greasebush Forsellesia arida Forsellesia nevadensis Forsellesia stipulifera Glossopetalon nevadense Glossopetalon nevadense var. stipuliferum Glossopetalon stipuliferum Glossopetalon spinescens var. meionandrum spiny greasebush Forsellesia meionandra Glossopetalon meionandrum Glossopetalon spinescens var. microphyllum spiny greasebush Glossopetalon spinescens var. spinescens spiny greasebush Forsellesia spinescens Glyceria mannagrass Glyceria borealis small floating mannagrass Panicularia borealis Glyceria grandis American mannagrass Glyceria grandis var. grandis American mannagrass Glyceria maxima var. americana Glyceria maxima ssp. grandis Panicularia grandis Glyceria striata fowl mannagrass Glyceria elata Glyceria nervata Glyceria striata var. stricta Glyceria striata ssp. stricta Panicularia nervata Panicularia striata Glycyrrhiza licorice Glycyrrhiza lepidota American licorice Glycyrrhiza glutinosa Glycyrrhiza lepidota var. glutinosa Glyptopleura glyptopleura Glyptopleura setulosa holy dandelion Gnaphalium cudweed Gnaphalium exilifolium slender cudweed Gnaphalium grayi Gnaphalium palustre western marsh cudweed Filaginella palustris Gomphrena globe amaranth Gomphrena caespitosa tufted globe amaranth Gomphrena viridis Gomphrena nitida pearly globe amaranth Gomphrena sonorae Sonoran globe amaranth Goodyera rattlesnake plantain Goodyera oblongifolia western rattlesnake plantain Goodyera decipiens Goodyera oblongifolia var. reticulata Peramium decipiens Goodyera repens lesser rattlesnake plantain Goodyera ophioides Goodyera repens var. ophioides Goodyera repens ssp. ophioides Peramium ophioides Gossypium cotton Gossypium thurberi Thurber's cotton Thurberia thespesioides Graptopetalum leatherpetal Graptopetalum bartramii Patagonia Mountain leatherpetal Echeveria bartramii Graptopetalum rusbyi San Francisco River leatherpetal Cotyledon rusbyi Dudleya rusbyi Echeveria rusbyi Graptopetalum orpetii Gratiola hedgehyssop Gratiola neglecta clammy hedgehyssop Gratiola neglecta var. glaberrima Grayia hopsage Grayia spinosa spiny hopsage Atriplex grayi Atriplex spinosa Grindelia gumweed Grindelia arizonica Arizona gumweed Grindelia arizonica var. arizonica Arizona gumweed Grindelia arizonica var. dentata Grindelia arizonica var. microphylla Grindelia laciniata cutleaf gumweed Grindelia nuda curlytop gumweed Grindelia nuda var. aphanactis curlytop gumweed Grindelia aphanactis Grindelia papposa Spanish gold Haplopappus ciliatus Prionopsis ciliata Grindelia squarrosa curlycup gumweed Grindelia squarrosa var. serrulata curlycup gumweed Grindelia serrulata Grindelia squarrosa var. squarrosa curlycup gumweed Guardiola guardiola Guardiola platyphylla Apache plant Guilleminea matweed Guilleminea densa small matweed Guilleminea densa var. aggregata small matweed Guilleminea densa var. densa small matweed Brayulinea densa Illecebrum densum Guillenia mustard Guillenia lasiophylla California mustard Caulanthus lasiophyllus Caulanthus lasiophyllus var. inalienus Caulanthus lasiophyllus var. rigidus Caulanthus lasiophyllus var. utahensis Caulanthus stenocarpus Thelypodium lasiophyllum Thelypodium lasiophyllum var. inalienum Thelypodium lasiophyllum var. rigidum Thelypodium lasiophyllum var. utahense Thelypodium rigidum Thelypodium utahense Gutierrezia snakeweed Gutierrezia arizonica Arizona snakeweed Greenella arizonica Xanthocephalum arizonicum Gutierrezia microcephala threadleaf snakeweed Brachyris microcephala Gutierrezia glomerella Gutierrezia lucida Gutierrezia sarothrae var. microcephala Xanthocephalum lucidum Xanthocephalum microcephalum Gutierrezia sarothrae broom snakeweed Gutierrezia diversifolia Gutierrezia lepidota Gutierrezia linearifolia Gutierrezia linearis Gutierrezia linoides Gutierrezia longipappa Gutierrezia pomariensis Gutierrezia sarothrae var. pomariensis Gutierrezia tenuis Solidago sarothrae Xanthocephalum sarothrae Xanthocephalum sarothrae var. pomariense Xanthocephalum tenue Gutierrezia serotina late snakeweed Gutierrezia polyantha Gutierrezia sphaerocephala roundleaf snakeweed Gutierrezia eriocarpa Xanthocephalum sphaerocephalum Xanthocephalum sphaerocephalum var. eriocarpum Gutierrezia wrightii Wright's snakeweed Greenella discoidea Xanthocephalum wrightii Gymnocarpium oakfern Gymnocarpium dryopteris western oakfern Dryopteris dryopteris Dryopteris linnaeana Phegopteris dryopteris Thelypteris dryopteris Gymnosperma gymnosperma Gymnosperma glutinosum gumhead Selloa glutinosa Xanthocephalum glutinosum Hackelia stickseed Hackelia besseyi Bessey's stickseed Hackelia grisea Hackelia floribunda manyflower stickseed Hackelia leptophylla Lappula floribunda Hackelia pinetorum Livermore stickseed Hackelia pinetorum var. pinetorum Livermore stickseed Hackelia ursina Chihuahuan stickseed Hackelia ursina var. diaboli Chihuahuan stickseed Hackelia ursina var. pustulata Chihuahuan stickseed Hackelia ursina var. ursina Chihuahuan stickseed Hackelochloa pitscale grass Hackelochloa granularis pitscale grass Cenchrus granularis Mnesithea granularis Rytilix granularis Halenia spurred gentian Halenia recurva Mt. Graham spurred gentian Swertia recurva Halimolobos fissurewort Halimolobos diffusa spreading fissurewort Halogeton saltlover Halogeton glomeratus saltlover Haplophyton haplophyton Haplophyton crooksii cockroachplant Haplophyton cimicidum Haplophyton cimicidum var. crooksii Harpagonella grapplinghook Harpagonella palmeri Palmer's grapplinghook Harpagonella palmeri var. arizonica Arizona grapplinghook Harpagonella palmeri var. palmeri Palmer's grapplinghook Hedeoma false pennyroyal Hedeoma costata ribbed false pennyroyal Hedeoma costata var. pulchella ribbed false pennyroyal Hedeoma convisae Hedeoma pulchella Hedeoma dentata dentate false pennyroyal Hedeoma diffusa spreading false pennyroyal Hedeoma blepharodonta Hedeoma drummondii Drummond's false pennyroyal Hedeoma campora Hedeoma ciliata Hedeoma drummondii var. crenulata Hedeoma longiflora Hedeoma ovata Hedeoma hyssopifolia aromatic false pennyroyal Hedeoma nana dwarf false pennyroyal Hedeoma nana ssp. californica California false pennyroyal Hedeoma nana ssp. macrocalyx dwarf false pennyroyal Hedeoma nana ssp. nana dwarf false pennyroyal Hedeoma nana ssp. typica Hedeoma thymoides Hedeoma oblongifolia oblongleaf false pennyroyal Hedeoma piperita var. oblongifolia Hedeoma thymoides var. oblongifolia Hedera ivy Hedera colchica colchis ivy Hedera helix English ivy Hedyotis starviolet Hedyotis greenei Greene's starviolet Houstonia greenei Oldenlandia greenei Hedyotis vegrandis New Mexico starviolet Hedypnois hedypnois Hedypnois cretica Cretanweed Hedysarum sweetvetch Hedysarum boreale boreal sweetvetch Hedysarum boreale ssp. boreale boreal sweetvetch Hedysarum boreale ssp. boreale var. boreale boreal sweetvetch Hedysarum boreale var. cinerascens Hedysarum boreale var. obovatum Hedysarum boreale var. pabulare Hedysarum boreale var. rivulare Hedysarum boreale var. typicum Hedysarum boreale var. utahense Hedysarum cinerascens Hedysarum mackenziei var. fraseri Hedysarum pabulare var. rivulare Helenium sneezeweed Helenium arizonicum Arizona sneezeweed Helenium autumnale common sneezeweed Helenium autumnale var. autumnale common sneezeweed Helenium autumnale var. canaliculatum Helenium autumnale var. parviflorum Helenium canaliculatum Helenium latifolium Helenium parviflorum Helenium autumnale var. montanum mountain sneezeweed Helenium montanum Helenium thurberi Thurber's sneezeweed Helianthella helianthella Helianthella microcephala purpledisk helianthella Encelia microcephala Helianthella parryi Parry's dwarf-sunflower Helianthella quinquenervis fivenerve helianthella Helianthus quinquenervis Helianthus sunflower Helianthus annuus common sunflower Helianthus annuus ssp. jaegeri Helianthus annuus ssp. lenticularis Helianthus annuus var. lenticularis Helianthus annuus var. macrocarpus Helianthus annuus ssp. texanus Helianthus annuus var. texanus Helianthus aridus Helianthus lenticularis Helianthus anomalus western sunflower Helianthus deserticola Helianthus arizonensis Arizona sunflower Helianthus ciliaris Texas blueweed Helianthus niveus showy sunflower Helianthus niveus ssp. canescens showy sunflower Helianthus canescens Helianthus canus Helianthus petiolaris var. canescens Helianthus niveus ssp. tephrodes Algodones sunflower Helianthus tephrodes Helianthus nuttallii Nuttall's sunflower Helianthus nuttallii ssp. nuttallii Nuttall's sunflower Helianthus fascicularis Helianthus nuttallii ssp. canadensis Helianthus nuttallii ssp. coloradensis Helianthus petiolaris prairie sunflower Helianthus petiolaris ssp. fallax prairie sunflower Helianthus petiolaris var. fallax Heliomeris false goldeneye Heliomeris ciliata hairy false goldeneye Gymnolomia hispida var. ciliata Viguiera ciliata Heliomeris longifolia longleaf false goldeneye Heliomeris longifolia var. annua longleaf false goldeneye Heliomeris annua Viguiera annua Viguiera longifolia var. annua Heliomeris longifolia var. longifolia longleaf false goldeneye Gymnolomia longifolia Viguiera longifolia Heliomeris multiflora showy goldeneye Heliomeris multiflora var. brevifolia showy goldeneye Viguiera ovalis Heliomeris multiflora var. multiflora showy goldeneye Viguiera multiflora Heliomeris multiflora var. nevadensis Nevada goldeneye Viguiera multiflora var. nevadensis Heliopsis heliopsis Heliopsis parvifolia mountain oxeye Heliotropium heliotrope Heliotropium convolvulaceum phlox heliotrope Heliotropium convolvulaceum var. convolvulaceum phlox heliotrope Euploca convolvulacea Heliotropium curassavicum salt heliotrope Heliotropium curassavicum var. oculatum seaside heliotrope Heliotropium curassavicum ssp. oculatum Heliotropium fruticosum Key West heliotrope Heliotropium phyllostachyum Heliotropium pringlei Pringle's heliotrope Heliotropium procumbens fourspike heliotrope Heliotropium procumbens var. procumbens fourspike heliotrope Heliotropium inundatum Hemizonia tarweed Hemizonia kelloggii Kellogg's tarweed Hemizonia pungens common tarweed Hemizonia pungens ssp. pungens common tarweed Henrya henrya Henrya insularis island renegade Henrya brevifolia Heracleum cowparsnip Heracleum maximum common cowparsnip Heracleum lanatum Heracleum sphondylium var. lanatum Heracleum sphondylium ssp. montanum Herissantia herissantia Herissantia crispa bladdermallow Abutilon crispum Bogenhardia crispa Gayoides crispum Hermannia hermannia Hermannia pauciflora Santa Catalina burstwort Herniaria rupturewort Herniaria hirsuta hairy rupturewort Herniaria hirsuta ssp. cinerea hairy rupturewort Herniaria cinerea Hesperocallis desert lily Hesperocallis undulata desert lily Hesperochiron hesperochiron Hesperochiron pumilus dwarf hesperochiron Hesperochiron villosulus Hesperodoria glowweed Hesperodoria salicina willow glowweed Haplopappus salicinus Hesperodoria scopulorum Grand Canyon glowweed Haplopappus scopulorum Haplopappus scopulorum var. hirtellus Hesperostipa needle and thread Hesperostipa comata needle and thread Hesperostipa comata ssp. comata needle and thread Stipa comata Stipa comata ssp. intonsa Hesperostipa comata ssp. intermedia intermediate needle and thread Stipa comata var. falcata Stipa comata var. intermedia Stipa comata var. suksdorfii Hesperostipa neomexicana New Mexico feathergrass Stipa neomexicana Heteranthera mudplantain Heteranthera dubia grassleaf mudplantain Heteranthera graminea Heteranthera liebmannii Zosterella dubia Zosterella longituba Heteranthera limosa blue mudplantain Pontederia limosa Heteranthera peduncularis egret mudplantain Heteranthera rotundifolia roundleaf mudplantain Heteropogon tanglehead Heteropogon contortus tanglehead Andropogon contortus Heteropogon melanocarpus sweet tanglehead Andropogon melanocarpus Heterosperma heterosperma Heterosperma pinnatum wingpetal Heterotheca false goldenaster Heterotheca fulcrata rockyscree false goldenaster Heterotheca fulcrata var. amplifolia rockyscree false goldenaster Chrysopsis amplifolia Chrysopsis caudata Chrysopsis nitidula Heterotheca fulcrata var. arizonica Arizona false goldenaster Heterotheca fulcrata var. fulcrata rockyscree false goldenaster Chrysopsis cryptocephala Chrysopsis fulcrata Chrysopsis resinolens Heterotheca fulcrata var. senilis rockyscree false goldenaster Chrysopsis senilis Heterotheca grandiflora telegraphweed Heterotheca floribunda Heterotheca marginata Sonora false goldenaster Heterotheca rutteri Rutter's false goldenaster Chrysopsis rutteri Heterotheca subaxillaris camphorweed Chrysopsis scabra Heterotheca lamarckii Heterotheca latifolia Heterotheca latifolia var. arkansana Heterotheca latifolia var. macgregoris Heterotheca psammophila Heterotheca scabra Heterotheca subaxillaris var. latifolia Heterotheca subaxillaris var. petiolaris Heterotheca subaxillaris var. psammophila Heterotheca subaxillaris var. procumbens Heterotheca villosa hairy false goldenaster Heterotheca villosa var. minor hairy false goldenaster Chrysopsis arida Chrysopsis bakeri Chrysopsis columbiana Chrysopsis hispida Chrysopsis villosa var. hispida Chrysopsis wisconsinensis Heterotheca villosa var. hispida Heterotheca wisconsinensis Heterotheca villosa var. nana hairy false goldenaster Chrysopsis canescens var. nana Chrysopsis horrida Heterotheca horrida Heterotheca villosa var. horrida Heterotheca villosa var. pedunculata hairy false goldenaster Chrysopsis pedunculata Heterotheca villosa var. scabra hairy false goldenaster Chrysopsis viscida ssp. cinerascens Heterotheca horrida ssp. cinerascens Heterotheca viscida cliff false goldenaster Chrysopsis viscida Chrysopsis villosa var. viscida Heterotheca zionensis Zion false goldenaster Heuchera alumroot Heuchera eastwoodiae Senator Mine alumroot Heuchera glomerulata Chiricahua Mountain alumroot Heuchera novomexicana New Mexico alumroot Heuchera parvifolia littleleaf alumroot Heuchera parvifolia var. arizonica Arizona alumroot Heuchera parvifolia var. flavescens littleleaf alumroot Heuchera rubescens pink alumroot Heuchera rubescens var. rubescens pink alumroot Heuchera rubescens var. versicolor pink alumroot Heuchera leptomeria Heuchera leptomeria var. peninsularis Heuchera versicolor Heuchera versicolor var. leptomeria Heuchera sanguinea coralbells Heuchera sanguinea var. pulchra coralbells Heuchera sanguinea var. sanguinea coralbells Hexalectris crested coralroot Hexalectris spicata spiked crested coralroot Hexalectris spicata var. arizonica spiked crested coralroot Hexalectris spicata var. spicata spiked crested coralroot Hexalectris warnockii Texas crested coralroot Hibiscus rosemallow Hibiscus biseptus Arizona rosemallow Hibiscus coulteri desert rosemallow Hibiscus coulteri var. brevipedunculatus Hibiscus denudatus paleface Hibiscus denudatus var. involucellatus Hibiscus trionum flower of an hour Trionum trionum Hieracium hawkweed Hieracium carneum Huachuca hawkweed Hieracium fendleri yellow hawkweed Hieracium fendleri var. discolor yellow hawkweed Hieracium fendleri var. fendleri yellow hawkweed Chlorocrepis fendleri Hieracium fendleri var. mogollense Mogollon hawkweed Hieracium lemmonii Lemmon's hawkweed Hieracium pringlei Pringle's hawkweed Hieracium rusbyi Rusby's hawkweed Hilaria curly-mesquite Hilaria belangeri curly-mesquite Hilaria belangeri var. belangeri curly-mesquite Anthephora belangeri Hilaria belangeri var. longifolia longleaf curly-mesquite Hippuris mare's-tail Hippuris vulgaris common mare's-tail Hoffmannseggia rushpea Hoffmannseggia glauca Indian rushpea Hoffmannseggia densiflora Hoffmannseggia densiflora var. capitata Hoffmannseggia densiflora var. demissa Hoffmannseggia densiflora var. pringlei Hoffmannseggia densiflora var. stricta Hoffmannseggia falcaria Holcus velvetgrass Holcus lanatus common velvetgrass Nothoholcus lanatus Holodiscus oceanspray Holodiscus discolor oceanspray Holodiscus boursieri Holodiscus discolor var. delnortensis Holodiscus discolor var. franciscanus Holodiscus discolor ssp. franciscanus Holodiscus discolor var. glabrescens Holodiscus dumosus var. australis Holodiscus dumosus var. glabrescens Holodiscus dumosus ssp. saxicola Holodiscus glabrescens Holodiscus microphyllus Holodiscus microphyllus var. glabrescens Holodiscus microphyllus var. sericeus Holodiscus microphyllus var. typicus Sericotheca discolor Spiraea discolor Holodiscus dumosus rockspirea Holodiscus discolor var. dumosus Holodiscus dumosus var. typicus Hordeum barley Hordeum arizonicum Arizona barley Critesion arizonicum Hordeum brachyantherum meadow barley Hordeum brachyantherum ssp. brachyantherum meadow barley Critesion brachyantherum Critesion jubatum ssp. breviaristatum Hordeum boreale Hordeum jubatum ssp. breviaristatum Hordeum jubatum var. boreale Hordeum nodosum Hordeum nodosum var. boreale Hordeum jubatum foxtail barley Hordeum jubatum ssp. jubatum foxtail barley Critesion jubatum Hordeum marinum seaside barley Hordeum marinum ssp. gussonianum Mediterranean barley Critesion geniculatum Critesion hystrix Critesion marinum ssp. gussonianum Hordeum geniculatum Hordeum gussonianum Hordeum hystrix Hordeum murinum mouse barley Hordeum murinum ssp. glaucum smooth barley Critesion glaucum Critesion murinum ssp. glaucum Hordeum glaucum Hordeum stebbinsii Hordeum murinum ssp. leporinum leporinum barley Critesion murinum ssp. leporinum Hordeum leporinum Hordeum murinum ssp. murinum wall barley Critesion murinum Hordeum pusillum little barley Critesion pusillum Hordeum pusillum var. pubens Hordeum vulgare common barley Hordeum aegiceras Hordeum distichon Hordeum hexastichum Hordeum hexastichon Hordeum irregulare Hordeum sativum Hordeum vulgare var. trifurcatum Horsfordia velvetmallow Horsfordia alata pink velvetmallow Sida alata Horsfordia newberryi Newberry's velvetmallow Abutilon newberryi Houstonia bluet Houstonia pusilla tiny bluet Hedyotis caerulea var. minima Hedyotis caerulea var. minor Hedyotis crassifolia Houstonia minima Houstonia patens Houstonia rubra red bluet Hedyotis rubra Oldenlandia rubra Houstonia wrightii pygmy bluet Hedyotis cervantesii Hedyotis pygmaea Hedyotis wrightii Hulsea alpinegold Hulsea heterochroma redray alpinegold Humulus hop Humulus lupulus common hop Humulus lupulus var. neomexicanus common hop Hutchinsia hutchinsia Hutchinsia procumbens prostrate hutchinsia Hymenolobus procumbens Hybanthus greenviolet Hybanthus attenuatus western greenviolet Hybanthus verticillatus babyslippers Hybanthus verticillatus var. verticillatus babyslippers Calceolaria verticillata Hybanthus linearis Hydrilla hydrilla Hydrilla verticillata waterthyme Hydrocotyle hydrocotyle Hydrocotyle prolifera whorled marshpennywort Hydrocotyle australis Hydrocotyle canbyi Hydrocotyle verticillata var. triradiata Hydrocotyle ranunculoides floating marshpennywort Hydrocotyle verticillata whorled marshpennywort Hydrocotyle verticillata var. verticillata whorled marshpennywort Hydrophyllum waterleaf Hydrophyllum occidentale western waterleaf Hydrophyllum occidentale var. watsonii Hymenoclea burrobrush Hymenoclea monogyra singlewhorl burrobrush Hymenoclea salsola burrobrush Hymenoclea salsola var. fasciculata burrobrush Hymenoclea fasciculata Hymenoclea salsola var. patula Hymenoclea salsola var. pentalepis burrobrush Hymenoclea pentalepis Hymenoclea salsola var. salsola burrobrush Hymenopappus hymenopappus Hymenopappus filifolius fineleaf hymenopappus Hymenopappus filifolius var. cinereus fineleaf hymenopappus Hymenopappus arenosus Hymenopappus cinereus Hymenopappus filifolius var. lugens Idaho hymenopappus Hymenopappus gloriosus Hymenopappus lugens Hymenopappus filifolius var. megacephalus fineleaf hymenopappus Hymenopappus filifolius var. nanus fineleaf hymenopappus Hymenopappus filifolius var. pauciflorus fineleaf hymenopappus Hymenopappus pauciflorus Hymenopappus filifolius var. tomentosus finehair hymenopappus Hymenopappus flavescens collegeflower Hymenopappus flavescens var. canotomentosus collegeflower Hymenopappus robustus Hymenopappus mexicanus Mexican woollywhite Hymenopappus radiatus ray hymenopappus Hymenothrix thimblehead Hymenothrix loomisii Loomis' thimblehead Hymenothrix wislizeni TransPecos thimblehead Hymenothrix wrightii Wright's thimblehead Hymenoxys rubberweed Hymenoxys ambigens Pinaleno Mountain rubberweed Plummera ambigens Hymenoxys bigelovii Bigelow's rubberweed Macdougalia bigelovii Hymenoxys cooperi Cooper's rubberweed Hymenoxys cooperi var. canescens Cooper's rubberweed Actinea canescens Hymenoxys cooperi var. cooperi Cooper's rubberweed Actinea cooperi Hymenoxys helenioides Intermountain rubberweed Picradenia helenioides Hymenoxys hoopesii owl's-claws Dugaldia hoopesii Helenium hoopesii Hymenoxys jamesii Jame's rubberweed Hymenoxys lemmonii Lemmon's rubberweed Hymenoxys microcephala Apache Passe rubberweed Plummera floribunda Hymenoxys odorata bitter rubberweed Picradenia odorata Hymenoxys quinquesquamata rincon rubberweed Hymenoxys richardsonii pingue rubberweed Hymenoxys richardsonii var. floribunda Colorado rubberweed Actinella richardsonii var. floribunda Hymenoxys olivacea Hymenoxys richardsonii var. utahensis Picradenia richardsonii var. floribunda Hymenoxys rusbyi Rusby's rubberweed Hymenoxys subintegra Arizona rubberweed Hypericum St. Johnswort Hypericum anagalloides tinker's penny Hypericum scouleri Scouler's St. Johnswort Hypericum scouleri ssp. scouleri Scouler's St. Johnswort Hypericum formosum var. scouleri Hypericum formosum ssp. scouleri Hypoxis star-grass Hypoxis mexicana Mexican yellow star-grass Hyptis bushmint Hyptis emoryi desert lavender Ibervillea globeberry Ibervillea tenuisecta slimlobe globeberry Sicydium lindheimeri var. tenuisectum Iliamna wild hollyhock Iliamna grandiflora largeflower wild hollyhock Iliamna angulata Imperata satintail Imperata brevifolia California satintail Imperata hookeri Indigofera indigo Indigofera sphaerocarpa Sonoran indigo Ipomoea morning-glory Ipomoea barbatisepala canyon morning-glory Ipomoea capillacea purple morning-glory Convolvulus capillaceus Ipomoea muricata Ipomoea cardiophylla heartleaf morning-glory Ipomoea aristolochiifolia Ipomoea costellata crestrib morning-glory Ipomoea cristulata Transpecos morning-glory Ipomoea hederacea ivyleaf morning-glory Ipomoea barbigera Ipomoea desertorum Ipomoea hederacea var. integriuscula Ipomoea hirsutula Pharbitis barbigera Pharbitis hederacea Ipomoea xleucantha pro sp. [cordatotriloba x lacunosa] Ipomoea lindheimeri Lindheimer's morning-glory Ipomoea longifolia pinkthroat morning-glory Ipomoea plummerae Huachuca Mountain morning-glory Ipomoea plummerae var. cuneifolia Huachuca Mountain morning-glory Ipomoea cuneifolia Ipomoea egregia Ipomoea plummerae var. egregia Ipomoea plummerae var. plummerae Huachuca Mountain morning-glory Ipomoea pubescens silky morning-glory Ipomoea heterophylla Ipomoea purpurea tall morning-glory Convolvulus purpureus Ipomoea hirsutula Ipomoea purpurea var. diversifolia Pharbitis purpurea Ipomoea tenuiloba spiderleaf Ipomoea tenuiloba var. lemmonii spiderleaf Ipomoea lemmonii Ipomoea ternifolia tripleleaf morning-glory Ipomoea ternifolia var. leptotoma tripleleaf morning-glory Ipomoea leptotoma Ipomoea leptotoma var. wootonii Ipomoea thurberi Thurber's morning-glory Ipomoea triloba littlebell Ipomopsis ipomopsis Ipomopsis aggregata scarlet gilia Ipomopsis aggregata ssp. formosissima scarlet gilia Gilia aggregata ssp. formosissima Gilia aggregata var. maculata Gilia texana Ipomopsis aggregata ssp. texana Ipomopsis aggregata var. texana Ipomopsis arizonica ssp. texana Ipomopsis arizonica Arizona ipomopsis Callisteris arizonica Gilia aggregata var. arizonica Gilia arizonica Ipomopsis aggregata ssp. arizonica Ipomopsis congesta ballhead ipomopsis Ipomopsis congesta ssp. frutescens ballhead ipomopsis Gilia congesta var. frutescens Gilia frutescens Ipomopsis frutescens Ipomopsis gunnisonii sanddune ipomopsis Gilia gunnisonii Ipomopsis laxiflora iron ipomopsis Gilia laxiflora Ipomopsis longiflora flaxflowered ipomopsis Ipomopsis longiflora ssp. australis whiteflower ipomopsis Ipomopsis longiflora ssp. longiflora flaxflowered ipomopsis Gilia longiflora Ipomopsis macombii Macomb's ipomopsis Gilia calothrysa Gilia macombii Gilia pringlei Ipomopsis macrosiphon longtube ipomopsis Gilia aggregata var. macrosiphon Ipomopsis aggregata var. macrosiphon Ipomopsis tenuituba ssp. macrosiphon Ipomopsis multiflora manyflowered ipomopsis Gilia multiflora Ipomopsis polyantha Pagosa ipomopsis Gilia brachysiphon Gilia polyantha Gilia polyantha var. whitingii Ipomopsis polycladon manybranched ipomopsis Gilia polycladon Ipomopsis pumila dwarf ipomopsis Gilia pumila Ipomopsis tenuifolia slenderleaf skyrocket Loeselia tenuifolia Ipomopsis tenuituba slendertube skyrocket Ipomopsis tenuituba ssp. latiloba slendertube skyrocket Ipomopsis thurberi El Paso skyrocket Gilia thurberi Iresine bloodleaf Iresine heterophylla Standley's bloodleaf Iris iris Iris missouriensis Rocky Mountain iris Iris longipetala Iris missouriensis var. arizonica Iris missouriensis var. pelogonus Iris pariensis Iris tolmieana Isanthus fluxweed Isanthus brachiatus fluxweed Isanthus brachiatus var. linearis Tetraclea viscida Trichostema brachiatum Isocoma goldenbush Isocoma acradenia alkali goldenbush Isocoma acradenia var. acradenia alkali goldenbush Haplopappus acradenius Isocoma acradenia var. eremophila alkali goldenbush Haplopappus acradenius ssp. eremophilus Isocoma acradenia ssp. eremophila Isocoma eremophila Isocoma azteca Aztec goldenbush Isocoma pluriflora southern goldenbush Haplopappus heterophyllus Haplopappus pluriflorus Isocoma wrightii Isocoma rusbyi Rusby's goldenbush Haplopappus rusbyi Isocoma tenuisecta burroweed Haplopappus tenuisectus Isoetes quillwort Isoetes bolanderi Bolander's quillwort Isoetes bolanderi var. pygmaea Isoetes pygmaea Iva marshelder Iva acerosa copperweed Oxytenia acerosa Iva ambrosiifolia ragged marshelder Iva axillaris povertyweed Iva axillaris ssp. robustior Iva axillaris var. robustior Iva dealbata woolly marshelder Iva xanthifolia giant sumpweed Cyclachaena xanthifolia Ivesia mousetail Ivesia arizonica rock whitefeather Ivesia arizonica var. arizonica Arizona whitefeather Potentilla osterhoutii Purpusia arizonica Purpusia osterhoutii Ivesia arizonica var. saxosa rock whitefeather Potentilla osterhoutii var. saxosa Purpusia saxosa Ivesia multifoliolata manyleaf mousetail Potentilla multifoliolata Ivesia sabulosa Intermountain mousetail Potentilla sabulosa Jacquemontia clustervine Jacquemontia agrestis midnightblue clustervine Jacquemontia palmeri Jacquemontia pringlei Pringle's clustervine Jaltomata false holly Jaltomata procumbens creeping false holly Saracha procumbens Jamesia cliffbush Jamesia americana fivepetal cliffbush Jamesia americana var. americana fivepetal cliffbush Janusia janusia Janusia gracilis slender janusia Jatropha nettlespurge Jatropha cardiophylla sangre de cristo Mozinna cardiophylla Jatropha cinerea Arizona nettlespurge Mozinna cinerea Jatropha cuneata physicnut Jatropha macrorhiza ragged nettlespurge Jatropha macrorhiza var. septemfida ragged nettlespurge Juglans walnut Juglans major Arizona walnut Juglans elaeopyren Juglans microcarpa var. major Juglans rupestris var. major Juncus rush Juncus acuminatus tapertip rush Juncus acutus spiny rush Juncus acutus ssp. leopoldii Leopold's rush Juncus acutus var. sphaerocarpus Juncus ambiguus seasice rush Juncus bufonius var. halophilus Juncus bufonius var. ranarius Juncus ranarius Juncus articulatus jointleaf rush Juncus articulatus var. obtusatus Luzula hyperborea Juncus balticus Baltic rush Juncus balticus var. montanus mountain rush Juncus arcticus ssp. ater Juncus arcticus var. montanus Juncus ater Juncus brevicaudatus narrowpanicle rush Juncus bufonius toad rush Juncus bufonius var. bufonius toad rush Juncus bufonius var. occidentalis toad rush Juncus sphaerocarpus Juncus confusus Colorado rush Juncus exilis Juncus cooperi Cooper's rush Juncus drummondii Drummond's rush Juncus drummondii var. drummondii Drummond's rush Juncus dudleyi Dudley's rush Juncus tenuis var. dudleyi Juncus tenuis var. uniflorus Juncus effusus common rush Juncus effusus var. brunneus lamp rush Juncus effusus var. exiguus lamp rush Juncus effusus var. pacificus Pacific rush Juncus ensifolius swordleaf rush Juncus ensifolius var. major Juncus xiphioides var. triandrus Juncus interior inland rush Juncus interior var. arizonicus Arizona rush Juncus arizonicus Juncus interior var. interior inland rush Juncus tenuis var. uniflorus Juncus interior var. neomexicanus New Mexico rush Juncus neomexicanus Juncus longistylis longstyle rush Juncus longistylis var. longistylis longstyle rush Juncus longistylis var. scabratus longstyle rush Juncus macrophyllus longleaf rush Juncus marginatus grassleaf rush Juncus marginatus var. setosus Juncus setosus Juncus mertensianus Mertens' rush Juncus slwookoorum Juncus mexicanus Mexican rush Juncus balticus var. mexicanus Juncus nevadensis Sierra rush Juncus nevadensis var. badius Sierra rush Juncus badius Juncus mertensianus var. badius Juncus occidentalis western rush Juncus tenuis var. congestus Juncus saximontanus Rocky Mountain rush Juncus ensifolius var. brunnescens Juncus ensifolius var. montanus Juncus saximontanus var. robustior Juncus xiphioides var. macranthus Juncus xiphioides var. montanus Juncus tenuis poverty rush Juncus macer Juncus tenuis var. anthelatus Juncus tenuis var. multicornis Juncus tenuis var. williamsii Juncus torreyi Torrey's rush Juncus tracyi Tracy's rush Juncus xiphioides irisleaf rush Juniperus juniper Juniperus californica California juniper Juniperus cedrosiana Juniperus cerrosianus Juniperus pyriformis Sabina californica Juniperus coahuilensis redberry juniper Juniperus erythrocarpa Juniperus erythrocarpa var. coahuilensis Juniperus pinchotii var. erythrocarpa Juniperus communis common juniper Juniperus communis var. depressa common juniper Juniperus canadensis Juniperus communis ssp. depressa Juniperus depressa Juniperus deppeana alligator juniper Juniperus deppeana var. pachyphlaea Juniperus deppeana ssp. sperryi Juniperus deppeana var. sperryi Juniperus mexicana Juniperus pachyderma Juniperus monosperma oneseed juniper Juniperus occidentalis var. gymnocarpa Sabina monosperma Juniperus osteosperma Utah juniper Juniperus californica ssp. osteosperma Juniperus californica var. osteosperma Juniperus californica var. utahensis Juniperus knightii Juniperus megalocarpa Juniperus monosperma var. knightii Juniperus occidentalis var. utahensis Juniperus utahensis Juniperus utahensis var. megalocarpa Sabina osteosperma Sabina utahensis Juniperus scopulorum Rocky Mountain juniper Juniperus scopulorum var. columnaris Juniperus virginiana var. montana Juniperus virginiana ssp. scopulorum Juniperus virginiana var. scopulorum Sabina scopulorum Justicia water-willow Justicia californica beloperone Beloperone californica Justicia candicans Arizona water-willow Adhatoda candicans Jacobinia candicans Jacobinia ovata Justicia sonorae Sonoran water-willow Kallstroemia caltrop Kallstroemia californica California caltrop Kallstroemia brachystylis Kallstroemia californica var. brachystylis Kallstroemia grandiflora Arizona poppy Kallstroemia hirsutissima hairy caltrop Kallstroemia parviflora warty caltrop Kallstroemia intermedia Keckiella keckiella Keckiella antirrhinoides snapdragon penstemon Keckiella antirrhinoides ssp. microphylla snapdragon penstemon Keckiella antirrhinoides var. microphylla Penstemon antirrhinoides ssp. microphyllus Penstemon microphyllus Kelloggia kelloggia Kelloggia galioides milk kelloggia Koanophyllon thoroughwort Koanophyllon solidaginifolium shrubby thoroughwort Eupatorium solidaginifolium Kochia molly Kochia americana green molly Kochia americana var. vestita Kochia vestita Kochia prostrata prostrate summercypress Kochia scoparia Mexican-fireweed Bassia scoparia Bassia sieversiana Kochia alata Kochia scoparia var. culta Kochia scoparia var. pubescens Kochia scoparia var. subvillosa Kochia scoparia var. trichophila Kochia sieversiana Kochia trichophila Koeberlinia allthorn Koeberlinia spinosa crown of thorns Koeberlinia spinosa var. spinosa crown of thorns Koeberlinia spinosa var. tenuispina crown of thorns Koeleria Junegrass Koeleria macrantha prairie Junegrass Koeleria cristata Koeleria cristata var. longifolia Koeleria cristata var. pinetorum Koeleria gracilis Koeleria nitida Koeleria pyramidata Koeleria yukonensis Krameria ratany Krameria erecta littleleaf ratany Krameria glandulosa Krameria imparata Krameria parvifolia Krameria parvifolia var. glandulosa Krameria parvifolia var. imparata Krameria grayi white ratany Krameria lanceolata trailing krameria Krameria secundiflora Krameria spathulata Krascheninnikovia winterfat Krascheninnikovia lanata winterfat Ceratoides lanata Ceratoides lanata var. ruinina Ceratoides lanata var. subspinosa Eurotia lanata Eurotia lanata var. subspinosa Krigia dwarfdandelion Krigia biflora twoflower dwarfdandelion Krigia biflora var. biflora twoflower dwarfdandelion Cynthia virginica Hyoseris virginica Hyoseris biflora Krigia biflora ssp. glandulifera Krigia biflora var. viridis twoflower dwarfdandelion Cynthia viridis Lactuca lettuce Lactuca graminifolia grassleaf lettuce Lactuca graminifolia var. arizonica grassleaf lettuce Lactuca ludoviciana biannual lettuce Lactuca campestris Lactuca campestris var. typica Lactuca saligna willowleaf lettuce Lactuca saligna var. runcinata Lactuca serriola prickly lettuce Lactuca scariola Lactuca tatarica blue lettuce Lactuca tatarica var. pulchella blue lettuce Lactuca oblongifolia Lactuca pulchella Lactuca tatarica var. heterophylla Lactuca tatarica ssp. pulchella Sonchus tataricus Laennecia laennicia Laennecia coulteri conyza Conyza coulteri Conyza coulteri var. virgata Eschenbachia coulteri Laennecia eriophylla Cochise marshtail Conyza eriophylla Erigeron eriophyllus Laennecia schiedeana pineland marshtail Conyza schiedeana Erigeron schiedeanus Leptilon integrifolium Laennecia sophiifolia leafy marshtail Conyza coulteri var. tenuisecta Conyza sophiifolia Eschenbachia tenuisecta Lagascea lagascea Lagascea decipiens doll's head Lamarckia goldentop grass Lamarckia aurea goldentop grass Cynosurus aureus Lamium deadnettle Lamium amplexicaule henbit deadnettle Lamium amplexicaule var. album Langloisia langloisia Langloisia setosissima Great Basin langloisia Langloisia setosissima ssp. setosissima Great Basin langloisia Langloisia setosissima var. campyloclados Lantana lantana Lantana achyranthifolia brushland shrubverbena Lantana macropoda Lantana urticoides West Indian shrubverbena Lantana hispida Lantana horrida Lantana horrida var. latibracteata Lantana notha Lantana scorta Lantana urticoides var. hispidula Lappula stickseed Lappula occidentalis flatspine stickseed Lappula occidentalis var. cupulata flatspine stickseed Lappula redowskii var. cupulata Lappula redowskii var. texana Lappula texana Lappula texana var. coronata Lappula texana var. heterosperma Lappula texana var. homosperma Lappula occidentalis var. occidentalis flatspine stickseed Lappula echinata var. occidentalis Lappula redowskii Lappula redowskii var. desertorum Lappula redowskii var. occidentalis Lappula squarrosa European stickseed Lappula echinata Lappula erecta Lappula fremontii Lappula lappula Lappula myosotis Lappula squarrosa var. erecta Lapsana nipplewort Lapsana communis common nipplewort Larrea creosote bush Larrea tridentata creosote bush Larrea mexicana Larrea tridentata var. tridentata creosote bush Covillea tridentata Larrea divaricata Larrea glutinosa Lasianthaea lasianthaea Lasianthaea podocephala San Pedro daisy Verbesina podocephala Zexmenia podocephala Lasthenia goldfields Lasthenia californica California goldfields Baeria chrysostoma Baeria chrysostoma ssp. gracilis Baeria chrysostoma var. gracilis Baeria chrysostoma ssp. hirsutula Baeria hirsutula Lasthenia chrysostoma Lathyrus pea Lathyrus brachycalyx Bonneville pea Lathyrus brachycalyx ssp. zionis bush pea Lathyrus brachycalyx var. zionis Lathyrus zionis Lathyrus eucosmus bush vetchling Lathyrus brachycalyx var. eucosmus Lathyrus brachycalyx ssp. eucosmus Lathyrus graminifolius grassleaf pea Lathyrus laetivirens aspen pea Lathyrus lanszwertii var. laetivirens Lathyrus leucanthus var. laetivirens Lathyrus lanszwertii Nevada pea Lathyrus lanszwertii var. leucanthus Nevada pea Lathyrus arizonicus Lathyrus lanszwertii var. arizonicus Lathyrus leucanthus Lathyrus lanszwertii var. pallescens Nevada pea Lathyrus latifolius perennial pea Lathyrus pauciflorus fewflower pea Lathyrus pauciflorus var. utahensis Utah pea Lathyrus pauciflorus ssp. utahensis Layia tidytips Layia glandulosa whitedaisy tidytips Layia glandulosa ssp. lutea Leersia cutgrass Leersia oryzoides rice cutgrass Homalocenchrus oryzoides Phalaris oryzoides Leibnitzia sunbonnets Leibnitzia lyrata Seeman's sunbonnets Chaptalia alsophila Chaptalia leucocephala Chaptalia seemannii Leibnitzia seemannii Lemna duckweed Lemna aequinoctialis lesser duckweed Lemna angolensis Lemna paucicostata Lemna trinervis Lemna gibba swollen duckweed Lemna minor common duckweed Lemna cyclostasa Lemna minima Lemna minuta least duckweed Lemna minima Lemna minuscula Lemna valdiviana var. abbreviata Lemna valdiviana var. minima Lemna obscura little duckweed Lemna minor var. obscura Lemna perpusilla minute duckweed Lemna perpusilla var. trinervis Lemna trisulca star duckweed Lemna turionifera turion duckweed Lemna valdiviana valdivia duckweed Lemna cyclostasa Lemna torreyi Leontodon hawkbit Leontodon hirtus rough hawkbit Apargia nudicaulis Leontodon nudicaulis Leontodon taraxacoides lesser hawkbit Leontodon taraxacoides ssp. taraxacoides lesser hawkbit Leontodon leysseri Leontodon nudicaulis ssp. taraxacoides Leonurus motherwort Leonurus cardiaca common motherwort Lepidium pepperweed Lepidium alyssoides mesa pepperwort Lepidium alyssoides var. alyssoides mesa pepperwort Lepidium montanum var. alyssoides Lepidium montanum ssp. alyssoides Lepidium alyssoides var. junceum mesa pepperwort Lepidium campestre field pepperweed Neolepia campestris Thlaspi campestre Lepidium densiflorum common pepperweed Lepidium densiflorum var. densiflorum common pepperweed Lepidium densiflorum var. typicum Lepidium neglectum Lepidium texanum Lepidium densiflorum var. macrocarpum bigseed pepperweed Lepidium densiflorum var. ramosum miner's pepperweed Lepidium ramosum Lepidium fremontii desert pepperweed Lepidium fremontii var. fremontii desert pepperweed Lepidium integrifolium thickleaf pepperweed Lepidium integrifolium var. integrifolium thickleaf pepperweed Lepidium campestre var. integrifolium Lepidium montanum var. integrifolium Lepidium lasiocarpum shaggyfruit pepperweed Lepidium lasiocarpum var. lasiocarpum shaggyfruit pepperweed Lepidium lasiocarpum var. georginum Lepidium lasiocarpum var. rotundum Lepidium lasiocarpum var. typicum Lepidium lasiocarpum var. wrightii Wright's pepperweed Lepidium latifolium broadleaved pepperweed Cardaria latifolia Lepidium montanum mountain pepperweed Lepidium montanum var. canescens mountain pepperweed Lepidium montanum ssp. canescens Lepidium montanum var. cinereum mountain pepperweed Lepidium montanum ssp. cinereum Lepidium montanum var. stelliae Lepidium montanum var. glabrum mountain pepperweed Lepidium montanum var. jonesii Jones' pepperweed Lepidium jonesii Lepidium montanum var. montanum mountain pepperweed Lepidium oblongum veiny pepperweed Lepidium oblongum var. oblongum veiny pepperweed Lepidium bipinnatifidum Lepidium perfoliatum clasping pepperweed Lepidium ramosissimum manybranched pepperweed Lepidium ramosissimum var. bourgeauanum Bourgeau's pepperweed Lepidium bourgeauanum Lepidium densiflorum var. bourgeauanum Lepidium thurberi Thurber's pepperweed Lepidium virginicum Virginia pepperweed Lepidium virginicum var. medium medium pepperweed Lepidium idahoense Lepidium medium Lepidium virginicum var. pubescens hairy pepperweed Lepidium medium var. pubescens Leptochloa sprangletop Leptochloa dubia green sprangletop Chloris dubia Diplachne dubia Leptochloa fusca Malabar sprangletop Leptochloa fusca ssp. fascicularis bearded sprangletop Diplachne acuminata Diplachne fascicularis Diplachne maritima Leptochloa acuminata Leptochloa fascicularis Leptochloa fascicularis var. acuminata Leptochloa fascicularis var. maritima Leptochloa fusca ssp. uninervia Mexican sprangletop Diplachne uninervia Leptochloa uninervia Megastachya uninervia Leptochloa nealleyi Nealley's sprangletop Leptochloa panicea mucronate sprangletop Leptochloa panicea ssp. brachiata mucronate sprangeltop Festuca filiformis Leptochloa brachiata Leptochloa filiformis Leptochloa filiformis var. pulchella Leptochloa viscida sticky sprangletop Diplachne viscida Leptodactylon pricklyphlox Leptodactylon pungens granite prickly phlox Gilia hallii Gilia pungens Gilia pungens var. hookeri Leptodactylon hazeliae Leptodactylon lilacinum Leptodactylon pungens ssp. brevifolium Leptodactylon pungens ssp. eupungens Leptodactylon pungens ssp. hallii Leptodactylon pungens ssp. hookeri Leptodactylon pungens ssp. hazeliae Leptodactylon pungens var. hallii Leptodactylon pungens var. hookeri Leptodactylon pungens ssp. pulchriflorum Leptodactylon pungens ssp. squarrosum Lesquerella bladderpod Lesquerella arizonica Arizona bladderpod Lesquerella arizonica var. nudicaulis Lesquerella cinerea basin bladderpod Lesquerella fendleri Fendler's bladderpod Lesquerella foliacea Lesquerella praecox Lesquerella gooddingii Goodding's bladderpod Lesquerella gordonii Gordon's bladderpod Lesquerella gordonii var. gordonii Gordon's bladderpod Lesquerella intermedia mid bladderpod Lesquerella kaibabensis Kaibab bladderpod Lesquerella ludoviciana foothill bladderpod Lesquerella pinetorum White Mountain bladderpod Lesquerella purpurea rose bladderpod Lesquerella purpurea ssp. foliosa Lesquerella rectipes straight bladderpod Lesquerella tenella Moapa bladderpod Lesquerella wardii Ward's bladderpod Lessingia lessingia Lessingia lemmonii Lemmon's lessingia Lessingia lemmonii var. lemmonii Lemmon's lessingia Lessingia germanorum var. lemmonii Leucaena leadtree Leucaena leucocephala white leadtree Leucaena glauca Mimosa leucocephala Leucanthemum daisy Leucanthemum vulgare oxeye daisy Chrysanthemum leucanthemum Chrysanthemum leucanthemum var. boecheri Chrysanthemum leucanthemum var. pinnatifidum Leucanthemum leucanthemum Leucanthemum vulgare var. pinnatifidum Leucocrinum starlily Leucocrinum montanum common starlily Lewisia lewisia Lewisia brachycalyx shortsepal lewisia Lewisia pygmaea alpine lewisia Lewisia minima Lewisia pygmaea var. aridorum Lewisia sierrae Oreobroma pygmaeum Talinum pygmaeum Lewisia rediviva bitter root Lewisia rediviva var. rediviva bitter root Leymus wildrye Leymus cinereus basin wildrye Aneurolepidium piperi Elymus cinereus Elymus cinereus var. pubens Elymus condensatus var. pubens Elymus piperi Leymus salinus saline wildrye Leymus salinus ssp. mojavensis Mojave wildrye Leymus salinus ssp. salinus saline wildrye Elymus ambiguus var. strigosus Elymus ambiguus var. salinus Elymus salinus Elymus strigosus Leymus triticoides beardless wildrye Elymus condensatus var. triticoides Elymus orcuttianus Elymus triticoides Elymus triticoides var. pubescens Ligusticum licorice-root Ligusticum porteri Porter's licorice-root Ligusticum porteri var. porteri Porter's licorice-root Lilaeopsis grasswort Lilaeopsis schaffneriana Schaffner's grasswort Lilaeopsis schaffneriana var. recurva Schaffner's grasswort Lilaeopsis recurva Lilium lily Lilium parryi lemon lily Lilium parryi var. kessleri Limonium sealavender Limonium limbatum Transpecos sealavender Limonium limbatum var. glabrescens Limosella mudwort Limosella acaulis Owyhee mudwort Limosella aquatica water mudwort Limosella pubiflora Chiricahua Mountain mudwort Linanthus linanthus Linanthus aureus golden linanthus Linanthus aureus ssp. aureus golden linanthus Linanthus aureus ssp. decorus golden linanthus Linanthus aureus var. decorus Linanthus bigelovii Bigelow's linanthus Gilia bigelovii Linanthus demissus desertsnow Linanthus dichotomus eveningsnow Linanthus dichotomus ssp. dichotomus eveningsnow Gilia dichotoma Gilia dichotoma var. integra Linanthus floribundus manyflower linanthus Linanthus floribundus ssp. floribundus manyflower linanthus Linanthastrum floribundum Linanthastrum nuttallii ssp. floribundum Linanthus nuttallii ssp. floribundus Siphonella floribunda Linanthus jonesii Jones' linanthus Linanthus bigelovii var. jonesii Linanthus nuttallii Nuttall's linanthus Linanthus nuttallii ssp. tenuilobus Nuttall's linanthus Ipomopsis aggregata var. tenuilobus Linaria toadflax Linaria dalmatica Dalmatian toadflax Linaria dalmatica ssp. dalmatica Dalmatian toadflax Linaria genistifolia ssp. dalmatica Linaria vulgaris butter and eggs Linaria linaria Lindernia false pimpernel Lindernia dubia yellowseed false pimpernel Lindernia dubia var. anagallidea yellowseed false pimpernel Ilysanthes inequalis Lindernia anagallidea Lindernia dubia var. dubia yellowseed false pimpernel Gratiola dubia Ilysanthes attenuata Ilysanthes dubia Lindernia dubia var. major Lindernia dubia var. riparia Lindernia dubia var. typica Lindernia procumbens Lindernia pyxidaria Linnaea twinflower Linnaea borealis twinflower Linnaea borealis ssp. americana twinflower Linnaea americana Linnaea borealis var. americana Linum flax Linum aristatum bristle flax Cathartolinum aristatum Mesynium aristatum Linum australe southern flax Linum australe var. australe southern flax Cathartolinum australe Linum aristatum var. australe Mesynium australe Linum australe var. glandulosum southern flax Mesynium australe ssp. glandulosum Linum lewisii prairie flax Linum lewisii var. lewisii prairie flax Adenolinum lewisii Linum perenne var. lewisii Linum perenne ssp. lewisii Linum neomexicanum New Mexico yellow flax Cathartolinum neomexicanum Linum pratense meadow flax Adenolinum pratense Linum lewisii var. pratense Linum puberulum plains flax Cathartolinum puberulum Linum rigidum var. puberulum Mesynium puberulum Linum subteres sprucemont flax Linum aristatum var. subteres Linum leptopoda Mesynium subteres Linum usitatissimum common flax Linum humile Linum usitatissimum var. humile Lipocarpha halfchaff sedge Lipocarpha aristulata awned halfchaff sedge Hemicarpha aristulata Hemicarpha micrantha var. aristulata Lipocarpha microcephala Lipocarpha drummondii Drummond's halfchaff sedge Hemicarpha drummondii Hemicarpha micrantha var. drummondii Scirpus micranthus var. drummondii Lipocarpha micrantha smallflower halfchaff sedge Hemicarpha micrantha Hemicarpha micrantha var. minor Scirpus micranthus Scirpus micranthus var. minor Listera twayblade Listera convallarioides broadlipped twayblade Ophrys convallarioides Lithophragma woodland-star Lithophragma tenellum slender woodland-star Lithophragma australe Lithophragma brevilobum Lithophragma rupicola Lithophragma tenellum var. thompsonii Lithospermum stoneseed Lithospermum cobrense smooththroat stoneseed Lithospermum confine Arizona stoneseed Lithospermum incisum narrowleaf stoneseed Batschia linearifolia Lithospermum angustifolium Lithospermum linearifolium Lithospermum mandanense Lithospermum multiflorum manyflowered stoneseed Lithospermum obtusifolium roundleaf stoneseed Lithospermum viride green stoneseed Lobelia lobelia Lobelia anatina Apache lobelia Lobelia cardinalis cardinalflower Lobelia cardinalis ssp. graminea Lobelia cardinalis var. graminea Lobelia cardinalis var. multiflora Lobelia cardinalis var. meridionalis Lobelia cardinalis var. pseudosplendens Lobelia cardinalis var. phyllostachya Lobelia cardinalis var. propinqua Lobelia fulgens Lobelia splendens Lobelia fenestralis fringeleaf lobelia Lobelia laxiflora Sierra Madre lobelia Lobelia laxiflora var. angustifolia Sierra Madre lobelia Lobularia lobularia Lobularia maritima sweet alyssum Alyssum maritimum Clypeola maritima Koniga maritima Loeflingia loeflingia Loeflingia squarrosa spreading pygmyleaf Loeflingia squarrosa ssp. cactorum spreading pygmyleaf Loeflingia squarrosa ssp. squarrosa spreading pygmyleaf Loeflingia pusilla Loeflingia squarrosa var. texana Loeflingia texana Loeselia false calico Loeselia glandulosa glandular false calico Loeseliastrum calico Loeseliastrum schottii Schott's calico Langloisia flaviflora Langloisia schottii Navarretia schottii Lolium ryegrass Lolium arundinaceum tall fescue Festuca arundinacea Festuca elatior ssp. arundinacea Festuca elatior var. arundinacea Lolium perenne perennial ryegrass Lolium perenne ssp. multiflorum Italian ryegrass Lolium multiflorum Lolium multiflorum var. diminutum Lolium multiflorum var. muticum Lolium perenne var. aristatum Lolium perenne var. multiflorum Lolium perenne ssp. perenne perennial ryegrass Lolium multiflorum var. ramosum Lolium perenne var. cristatum Lolium pratense meadow ryegrass Festuca elatior Festuca pratensis Lolium rigidum Wimmera ryegrass Lolium loliaceum Lolium perenne ssp. rigidum Lolium rigidum ssp. lepturoides Lolium strictum Lolium subulatum Lolium temulentum Darnel ryegrass Lolium arvense Lolium temulentum var. arvense Lolium temulentum var. leptochaeton Lolium temulentum var. macrochaeton Lomatium desertparsley Lomatium bicolor Wasatch desertparsley Lomatium bicolor var. leptocarpum Wasatch desertparsley Lomatium leptocarpum Lomatium dissectum fernleaf biscuitroot Lomatium dissectum var. multifidum carrotleaf biscuitroot Leptotaenia multifida Lomatium dissectum var. eatonii Lomatium foeniculaceum desert biscuitroot Lomatium foeniculaceum ssp. macdougalii Macdougal's biscuitroot Lomatium foeniculaceum var. macdougalii Lomatium macdougalii Lomatium mohavense Mojave desertparsley Lomatium mohavense ssp. mohavense Mojave desertparsley Lomatium nevadense Nevada biscuitroot Lomatium nevadense var. nevadense Nevada biscuitroot Lomatium nevadense var. parishii Parish's biscuitroot Lomatium nevadense var. pseudorientale Lomatium orientale Northern Idaho biscuitroot Cogswellia orientalis Lomatium parryi Utah desertparsley Aletes parryi Lomatium scabrum rough desertparsley Lomatium scabrum var. tripinnatum rough desertparsley Lomatium simplex Great Basin desertparsley Lomatium simplex var. simplex Great Basin desertparsley Lomatium platycarpum Lomatium triternatum ssp. platycarpum Lonicera honeysuckle Lonicera albiflora western white honeysuckle Lonicera albiflora var. dumosa Lonicera dumosa Lonicera arizonica Arizona honeysuckle Lonicera ciliosa orange honeysuckle Lonicera interrupta chaparral honeysuckle Lonicera involucrata twinberry honeysuckle Lonicera involucrata var. involucrata twinberry honeysuckle Distegia involucrata Lonicera involucrata var. flavescens Xylosteum involucratum Lonicera japonica Japanese honeysuckle Lonicera japonica var. chinensis Nintooa japonica Lonicera utahensis Utah honeysuckle Lotus trefoil Lotus alamosanus Sonoran bird's-foot trefoil Hosackia alamosana Lotus corniculatus birdfoot deervetch Lotus corniculatus var. arvensis Lotus greenei Greene's bird's-foot trefoil Lotus hamatus San Diego bird's-foot trefoil Lotus humistratus foothill deervetch Hosackia brachycarpa Lotus mearnsii Mearns' bird's-foot trefoil Lotus mearnsii var. equisolensis Mearns' bird's-foot trefoil Lotus mearnsii var. mearnsii Mearns' bird's-foot trefoil Lotus oblongifolius streambank bird's-foot trefoil Lotus oblongifolius var. oblongifolius streambank bird's-foot trefoil Hosackia lathyroides Hosackia oblongifolia Hosackia torreyi Lotus oblongifolius var. nevadensis Lotus oblongifolius var. torreyi Lotus torreyi Lotus plebeius New Mexico bird's-foot trefoil Hosackia puberula var. nana Lotus longebracteatus Lotus neomexicanus Lotus xnummularius Lotus oroboides Lotus oroboides var. nanus Lotus oroboides var. nummularius Lotus rigidus shrubby deervetch Hosackia rigida Lotus salsuginosus coastal bird's-foot trefoil Lotus salsuginosus var. brevivexillus coastal bird's-foot trefoil Hosackia humilis Lotus salsuginosus ssp. brevivexillus Lotus strigosus strigose bird's-foot trefoil Lotus strigosus var. tomentellus strigose bird's-foot trefoil Hosackia tomentella Lotus tomentellus Lotus unifoliolatus American bird's-foot trefoil Lotus unifoliolatus var. unifoliolatus American bird's-foot trefoil Acmispon americanum Hosackia americana Lotus americanus Lotus purshianus Lotus purshianus var. glaber Lotus sericeus Lotus utahensis Utah bird's-foot trefoil Lotus wrightii Wright's deervetch Hosackia wrightii Ludwigia primrose-willow Ludwigia palustris marsh seedbox Isnardia palustris Jussiaea palustris Ludwigia palustris var. americana Ludwigia palustris var. nana Ludwigia palustris var. pacifica Ludwigia peploides floating primrose-willow Ludwigia peploides ssp. peploides floating primrose-willow Jussiaea peploides Jussiaea repens var. peploides Ludwigia repens creeping primrose-willow Isnardia intermedia Isnardia repens Ludwigia natans Ludwigia natans var. stipitata Ludwigia repens var. rotundata Ludwigia repens var. stipitata Lupinus lupine Lupinus x alpestris pro sp. [argenteus x caudatus] Great Basin lupine Lupinus acclivatatis Lupinus adscendens Lupinus aliesicola Lupinus alexanderae Lupinus annieae Lupinus argenteus var. aristovatus Lupinus argenteus var. krauchianus Lupinus argenteus var. macounii Lupinus argenteus var. prati-harti Lupinus argenteus var. submanens Lupinus argenteus var. wallianus Lupinus capitisamniculi Lupinus calcicola Lupinus clokeyanus Lupinus flavopinum Lupinus junipericola Lupinus laxus Lupinus lariversianus Lupinus macounii Lupinus patulipes Lupinus populorum Lupinus pulcherrimus Lupinus siccosilvae Lupinus trainianus Lupinus ammophilus sand lupine Lupinus polyphyllus var. ammophilus Lupinus argenteus silvery lupine Lupinus argenteus ssp. argenteus silvery lupine Lupinus argenteus ssp. argenteus var. argenteus silvery lupine Lupinus argenteus var. decumbens Lupinus corymbosus Lupinus decumbens Lupinus foliosus Lupinus garrettianus Lupinus laxiflorus var. corymbosus Lupinus laxiflorus var. foliosus Lupinus sitgreavesii Lupinus argenteus ssp. argenteus var. laxiflorus silvery lupine Lupinus argenteus var. stenophyllus Lupinus argenteus var. tenellus Lupinus cariciformes Lupinus charlestonensis Lupinus clarkensis Lupinus edward-palmeri Lupinus foliosus var. stenophyllus pro syn. Lupinus fremontensis Lupinus hullianus Lupinus lanatocarinatus Lupinus laxiflorus Lupinus laxiflorus var. tenellus Lupinus montis-cookii Lupinus stenophyllus Lupinus tenellus Lupinus tenellus Lupinus aridus desert lupine Lupinus aridus ssp. aridus desert lupine Lupinus lepidus var. aridus Lupinus lepidus ssp. aridus Lupinus arizonicus Arizona lupine Lupinus arizonicus ssp. arizonicus Arizona lupine Lupinus arizonicus ssp. arizonicus var. arizonicus Arizona lupine Lupinus concinnus var. arizonicus Lupinus sparsiflorus var. arizonicus Lupinus subhirsutus Lupinus arizonicus ssp. arizonicus var. barbatulus Arizona lupine Lupinus sparsiflorus var. barbatulus Lupinus arizonicus ssp. setosissimus Arizona lupine Lupinus sparsiflorus var. setosissimus Lupinus arizonicus ssp. sonorensis Sonora lupine Lupinus barbiger bearded lupine Lupinus sericeus var. barbiger Lupinus bicolor miniature lupine Lupinus bicolor ssp. microphyllus miniature lupine Lupinus bicolor var. microphyllus Lupinus micranthus var. microphyllus Lupinus bicolor ssp. pipersmithii miniature lupine Lupinus bicolor var. pipersmithii Lupinus pipersmithii Lupinus brevicaulis shortstem lupine Lupinus dispersus Lupinus scaposus Lupinus caudatus tailcup lupine Lupinus caudatus ssp. caudatus tailcup lupine Lupinus argentinus Lupinus argenteus var. heteranthus Lupinus argenteus var. utahensis Lupinus caudatus var. subtenellus Lupinus caudatus var. utahensis Lupinus gayophytophilus Lupinus holosericeus var. utahensis Lupinus lupinus Lupinus meionanthus var. heteranthus Lupinus montis-lieratatis Lupinus rosei Lupinus stinchfieldiae Lupinus utahensis Lupinus caudatus ssp. cutleri Cutler's spurred lupine Lupinus caudatus var. cutleri Lupinus cutleri Lupinus chihuahuensis Chihuahuan lupine Lupinus concinnus scarlet lupine Lupinus concinnus ssp. concinnus scarlet lupine Lupinus nipomensis Lupinus concinnus ssp. orcuttii Orcutt's lupine Lupinus concinnus var. orcuttii Lupinus micensis Lupinus orcuttii Lupinus hillii Hill's lupine Lupinus hillii var. arizonicus Hill's lupine Lupinus ingratus var. arizonicus Lupinus hillii var. hillii Hill's lupine Lupinus argenteus var. hillii Lupinus marcusianus Lupinus hillii var. osterhoutianus Osterhout's lupine Lupinus osterhoutianus Lupinus huachucanus Huachuca Mountain lupine Lupinus platanophilus Lupinus kingii King's lupine Lupinus kingii var. kingii King's lupine Lupinus capitatus Lupinus sileri Lupinus latifolius broadleaf lupine Lupinus latifolius ssp. parishii broadleaf lupine Lupinus latifolius var. parishii Lupinus parishii Lupinus lemmonii Lemmon's lupine Lupinus neomexicanus New Mexico lupine Lupinus blumeri Lupinus odoratus Mojave royal lupine Lupinus odoratus var. odoratus Mojave royal lupine Lupinus odoratus var. pilosellus Mojave royal lupine Lupinus palmeri bluebonnet lupine Lupinus argenteus var. palmeri Lupinus pusillus rusty lupine Lupinus pusillus ssp. intermontanus Intermountain lupine Lupinus intermontanus Lupinus pusillus var. intermontanus Lupinus pusillus ssp. pusillus rusty lupine Lupinus pusillus ssp. rubens rusty lupine Lupinus odoratus var. rubens Lupinus pusillus var. rubens Lupinus rubens Lupinus sericeus silky lupine Lupinus sericeus ssp. huffmanii silky lupine Lupinus aegra-ovium Lupinus huffmanii Lupinus larsonanus Lupinus puroviridus Lupinus quercus-jugi Lupinus rickeri Lupinus sericeus ssp. sericeus silky lupine Lupinus sericeus ssp. sericeus var. sericeus silky lupine Lupinus aliumbellatus Lupinus amniculi-salicis Lupinus blankinshipii Lupinus falsocomatus Lupinus herman-workii Lupinus jonesii Lupinus leucopsis Lupinus shockleyi purple desert lupine Lupinus sparsiflorus Mojave lupine Lupinus sparsiflorus ssp. mohavensis Mojave lupine Lupinus sparsiflorus var. mohavensis Lupinus succulentus hollowleaf annual lupine Lupinus succulentus var. layneae Lupinus volutans pinyon lupine Luzula woodrush Luzula multiflora common woodrush Luzula multiflora ssp. frigida common woodrush Luzula campestris var. frigida Luzula frigida Luzula intermedia Luzula multiflora var. frigida Luzula multiflora var. fusconigra Luzula sudetica Luzula sudetica var. frigida Luzula parviflora smallflowered woodrush Juncus melanocarpus Juncoides parviflorum Juncus parviflorus Luzula melanocarpa Luzula parviflora var. melanocarpa Luzula parviflora ssp. melanocarpa Luzula spicata spiked woodrush Juncoides spicatum Luzula spicata ssp. ?saximontana Lycium desert-thorn Lycium andersonii water jacket Lycium andersonii var. andersonii water jacket Lycium andersonii var. deserticola water jacket Lycium andersonii var. wrightii water jacket Lycium berlandieri Berlandier's wolfberry Lycium berlandieri var. longistylum Berlandier's wolfberry Lycium berlandieri var. parviflorum Berlandier's wolfberry Lycium berlandieri var. brevilobum Lycium californicum California desert-thorn Lycium cooperi peach thorn Lycium exsertum Arizona desert-thorn Lycium fremontii Fremont's desert-thorn Lycium macrodon desert wolfberry Lycium pallidum pale desert-thorn Lycium pallidum var. pallidum pale desert-thorn Lycium parishii Parish's desert-thorn Lycium torreyi squawthorn Lycopodium clubmoss Lycopodium annotinum stiff clubmoss Lycopodium annotinum var. acrifolium Lycopodium annotinum var. alpestre Lycopodium annotinum ssp. alpestre Lycopodium annotinum var. pungens Lycopodium annotinum ssp. pungens Lycopodium dubium Lycopus waterhorehound Lycopus americanus American water horehound Lycopus americanus var. longii Lycopus americanus var. scabrifolius Lycopus sinuatus Lycopus asper rough bugleweed Lycopus lucidus Lycopus lucidus ssp. americanus Lycopus lucidus var. americanus Lycurus wolfstail Lycurus setosus bristly wolfstail Pleopogon setosus Lygodesmia skeletonplant Lygodesmia arizonica Arizona skeletonplant Lygodesmia grandiflora var. arizonica Lygodesmia grandiflora largeflower skeletonplant Erythremia grandiflora Lygodesmia grandiflora var. stricta Lygodesmia juncea rush skeletonplant Lyrocarpa lyrepod Lyrocarpa coulteri Coulter's lyrepod Lyrocarpa coulteri var. coulteri Coulter's lyrepod Lyrocarpa coulteri var. typica Lysiloma false tamarind Lysiloma watsonii littleleaf false tamarind Lysiloma microphyllum var. thornberi Lysiloma thornberi Lysimachia yellow loosestrife Lysimachia hybrida lowland yellow loosestrife Lysimachia ciliata var. validula Lysimachia lanceolata ssp. hybrida Lysimachia lanceolata var. hybrida Steironema hybridum Steironema laevigatum Steironema lanceolatum var. hybridum Lythrum loosestrife Lythrum californicum California loosestrife Mabrya mabrya Mabrya acerifolia brittlestem Asarina acerifolia Maurandya acerifolia Machaeranthera tansyaster Machaeranthera arida arid tansyaster Machaeranthera ammophila Machaeranthera arizonica Machaeranthera coulteri var. arida Psilactis coulteri Machaeranthera bigelovii Bigelow's tansyaster Machaeranthera bigelovii var. mucronata Bigelow's tansyaster Aster adenolepis Machaeranthera mucronata Machaeranthera canescens hoary tansyaster Machaeranthera canescens ssp. canescens hoary tansyaster Machaeranthera canescens ssp. canescens var. ambigua hoary tansyaster Machaeranthera angustifolia Machaeranthera oxylepis Machaeranthera scoparia Machaeranthera canescens ssp. canescens var. canescens hoary tansyaster Aster canescens Aster canescens var. viscosus Aster glossophyllus Aster leiodes Aster shastensis var. glossophyllus Aster shastensis var. latifolius Dieteria canescens Dieteria divaricata Dieteria pulverulenta Dieteria viscosa Machaeranthera angustifolia Machaeranthera canescens var. latifolia Machaeranthera canescens var. monticola Machaeranthera canescens var. viscosa Machaeranthera divaricata Machaeranthera glabella Machaeranthera latifolia Machaeranthera laetevirens Aster laetevirens Machaeranthera leptophylla Machaeranthera linearis Machaeranthera montana Machaeranthera paniculata Machaeranthera pinosa Machaeranthera pulverulenta Machaeranthera ramosa Machaeranthera selbyi Machaeranthera shastensis var. glossophylla Machaeranthera shastensis var. latifolia Machaeranthera shastensis var. montana Machaeranthera spinulosa Amellus spinulosa Machaeranthera subalpina Machaeranthera superba Machaeranthera viscosa Machaeranthera canescens ssp. glabra hoary tansyaster Machaeranthera canescens ssp. glabra var. aristata hoary tansyaster Aster canescens var. aristatus Aster cichoriaceus Machaeranthera canescens var. vacans Machaeranthera cichoriacea Machaeranthera pulverulenta var. vacans Machaeranthera rigida Machaeranthera canescens ssp. glabra var. glabra hoary tansyaster Aster linearis Machaeranthera canescens var. viridis Machaeranthera fremontii Machaeranthera linearis Machaeranthera carnosa shrubby alkaliaster Machaeranthera carnosa var. carnosa shrubby alkaliaster Leucosyris carnosa Linosyris carnosa Machaeranthera gracilis slender goldenweed Dieteria gracilis Aster gracilis Haplopappus gracilis Haplopappus ravenii Sideranthus gracilis Machaeranthera grindelioides rayless tansyaster Machaeranthera grindelioides var. depressa rayless tansyaster Haplopappus nuttallii var. depressus Machaeranthera grindelioides var. grindelioides rayless tansyaster Eriocarpum grindelioides Haplopappus nuttallii Sideranthus grindelioides Machaeranthera parviflora smallflower tansyaster Aster parviflorus Aster parvulus Machaeranthera pygmaea Machaeranthera pinnatifida lacy tansyaster Machaeranthera pinnatifida ssp. gooddingii Goodding's tansyaster Machaeranthera pinnatifida ssp. gooddingii var. gooddingii Goodding's tansyaster Haplopappus gooddingii Haplopappus spinulosus var. gooddingii Sideranthus gooddingii Machaeranthera pinnatifida ssp. gooddingii var. paradoxa Goodding's tansyaster Haplopappus spinulosus var. paradoxa Machaeranthera pinnatifida ssp. pinnatifida lacy tansyaster Machaeranthera pinnatifida ssp. pinnatifida var. chihuahuana Chihuahua tansyaster Haplopappus spinulosus var. chihuahuanus Machaeranthera pinnatifida ssp. pinnatifida var. pinnatifida lacy tansyaster Amellus spinulosus Machaeranthera spinulosus Aster pinnatifidus Diplopappus pinnatifidus Dieteria spinulosa Eriocarpum australe Eriocarpum spinulosum Eriocarpum wootonii Haplopappus coulteri Haplopappus spinulosus Haplopappus spinulosus ssp. australis Haplopappus spinulosus ssp. cotulus Haplopappus spinulosus var. canescens Haplopappus spinulosus var. glaber Haplopappus spinulosus ssp. laevis Haplopappus spinulosus var. turbinellus Haplopappus texensis Machaeranthera australis Machaeranthera laevis Machaeranthera pinnata Machaeranthera texensis Sideranthus australis Sideranthus cotula Sideranthus laevis Sideranthus machaerantherus Sideranthus puberulus Sideranthus spinulosus Sideranthus turbinellus Sideranthus wootonii Starkea pinnata Machaeranthera riparia Chiricahua Mountain tansyaster Aster riparius Aster sonorae Machaeranthera sonorae Machaeranthera tagetina mesa tansyaster Aster tagetinus Machaeranthera tanacetifolia tanseyleaf tansyaster Aster tanacetifolius Machaeranthera coronopifolia Machaeranthera parthenium Macromeria giant-trumpets Macromeria viridiflora giant-trumpets Macromeria viridiflora var. thurberi Thurber's giant-trumpets Macromeria viridiflora var. viridiflora giant-trumpets Macroptilium bushbean Macroptilium atropurpureum purple bushbean Phaseolus atropurpureus Macroptilium gibbosifolium variableleaf bushbean Macroptilium heterophyllum Macroptilium heterophyllum var. rotundifolium Phaseolus heterophyllus Phaseolus heterophyllus var. rotundifolius Macrosiphonia rocktrumpet Macrosiphonia brachysiphon Huachuca Mountain rocktrumpet Madia tarweed Madia glomerata mountain tarweed Mahonia barberry Mahonia fremontii Fremont's mahonia Berberis fremontii Berberis higginsiae Mahonia higginsiae Odostemon fremontii Mahonia haematocarpa red barberry Berberis haematocarpa Mahonia repens creeping barberry Berberis amplectens Berberis aquifolium var. repens Berberis pumila Berberis repens Berberis sonnei Mahonia amplectens Mahonia pumila Mahonia sonnei Odostemon pumilus Odostemon repens Mahonia trifoliolata algerita Berberis trifoliolata Berberis trifoliolata var. glauca Mahonia trifoliolata var. glauca Maianthemum mayflower Maianthemum racemosum feathery false lily of the vally Maianthemum racemosum ssp. amplexicaule feathery false lily of the vally Maianthemum amplexicaule Maianthemum racemosum var. amplexicaule Smilacina amplexicaulis Smilacina amplexicaulis var. glabra Smilacina amplexicaulis var. jenkinsii Smilacina amplexicaulis var. ovata Smilacina racemosa var. amplexicaulis Smilacina racemosa var. brachystyla Smilacina racemosa var. glabra Smilacina racemosa var. jenkinsii Vagnera amplexicaulis Vagnera amplexicaulis var. glabra Maianthemum stellatum starry false lily of the vally Convallaria stellata Smilacina liliacea Smilacina sessilifolia Smilacina stellata Smilacina stellata var. crassa Smilacina stellata var. mollis Smilacina stellata var. sessilifolia Smilacina stellata var. sylvatica Vagnera liliacea Vagnera sessilifolia Vagnera stellata Malacothrix desertdandelion Malacothrix clevelandii Cleveland's desertdandelion Malacothrix coulteri snake's head Malacothrix coulteri var. cognata Zollikoferia elquiensis Malacothrix fendleri Fendler's desertdandelion Malacothrix glabrata smooth desertdandelion Malacothrix californica var. glabrata Malacothrix sonchoides sowthistle desertdandelion Leptoseris sonchoides Malacothrix sonorae Sonoran desertdandelion Malacothrix stebbinsii Stebbins' desertdandelion Malacothrix clevelandii var. stebbinsii Malacothrix torreyi Torrey's desertdandelion Malacothrix sonchoides var. torreyi Malaxis adder's-mouth orchid Malaxis corymbosa Huachuca Mountain adder's-mouth orchid Malaxis ehrenbergii Ehrenberg's adder's-mouth orchid Malaxis macrostachya Chiricahua adder's-mouth orchid Malaxis soulei Malaxis porphyrea Microstylis porphyrea Malaxis tenuis Arizona adder's-mouth orchid Malcolmia malcolmia Malcolmia africana African mustard Malva mallow Malva neglecta common mallow Malva rotundifolia Malva parviflora cheeseweed mallow Malva sylvestris high mallow Malva mauritiana Malva sylvestris ssp. mauritiana Malva sylvestris var. mauritiana Malvastrum false mallow Malvastrum bicuspidatum shrubby false mallow Malvastrum tricuspidatum var. bicuspidatum Malvella mallow Malvella lepidota scurfymallow Sida lepidota Sida leprosa var. depauperata Malvella leprosa alkali mallow Sida hederacea Sida leprosa Sida leprosa var. hederacea Malvella sagittifolia arrowleaf mallow Sida lepidota var. sagittifolia Sida leprosa var. sagittifolia Sida sagittifolia Mammillaria globe cactus Mammillaria grahamii Graham's nipple cactus Mammillaria grahamii var. grahamii Graham's nipple cactus Mammillaria microcarpa Mammillaria milleri Mammillaria microcarpa var. auricarpa Mammillaria grahamii var. oliviae Graham's nipple cactus Mammillaria oliviae Mammillaria heyderi little nipple cactus Mammillaria heyderi var. bullingtoniana little nipple cactus Mammillaria heyderi var. heyderi little nipple cactus Mammillaria gummifera var. applanata Mammillaria heyderi var. applanata Mammillaria heyderi var. macdougalii Macdougal's nipple cactus Mammillaria gummifera Mammillaria gummifera var. macdougalii Mammillaria macdougalii Mammillaria heyderi var. meiacantha little nipple cactus Mammillaria gummifera var. meiacantha Mammillaria meiacantha Mammillaria lasiacantha lacespine nipple cactus Mammillaria lasiacantha var. denudata Mammillaria mainiae counterclockwise nipple cactus Mammillaria tetrancistra common fishhook cactus Phellosperma tetrancistra Mammillaria thornberi Thornber's nipple cactus Mammillaria viridiflora greenflower nipple cactus Mammillaria orestera Mammillaria wrightii Wright's nipple cactus Mammillaria wrightii var. wilcoxii Wilcox's nipple cactus Mammillaria meridiorosei Mammillaria wilcoxii Mammillaria wrightii var. wrightii Wright's nipple cactus Manihot manihot Manihot angustiloba desertmountain manihot Janipha manihot var. angustiloba Manihot davisiae Arizona manihot Mantisalca mantisalca Mantisalca salmantica dagger flower Centaurea salmantica Marah manroot Marah gilensis Gila manroot Margaranthus margaranthus Margaranthus solanaceus netted globecherry Margaranthus lemmonii Margaranthus purpurascens Marina false prairie-clover Marina calycosa San Pedro false prairie-clover Dalea calycosa Marina diffusa spreading false prairie-clover Dalea diffusa Marina parryi Parry's false prairie-clover Dalea parryi Marrubium horehound Marrubium vulgare horehound Marsilea waterclover Marsilea mollis Chihuahuan waterclover Marsilea vestita hairy waterclover Marsilea vestita ssp. vestita hairy waterclover Marsilea fournieri Marsilea minuta Marsilea mucronata Marsilea uncinata Marsilea vestita var. mucronata Matelea milkvine Matelea arizonica Arizona milkvine Gonolobus arizonicus Lachnostoma arizonicum Matelea balbisii Balbis' milkvine Pherotrichis balbisii Matelea cordifolia Sonoran milkvine Rothrockia cordifolia Matelea parvifolia spearleaf Gonolobus californicus Gonolobus parvifolius Matelea producta Texas milkvine Gonolobus productus Matricaria mayweed Matricaria courrantiana crown mayweed Matricaria discoidea disc mayweed Artemisia matricarioides Chamomilla suaveolens Lepidanthus suaveolens Lepidotheca suaveolens Matricaria matricarioides Matricaria suaveolens Santolina suaveolens Tanacetum suaveolens Matricaria recutita German chamomile Chamomilla chamomilla Chamomilla recutita Matricaria chamomilla 1755 1763 1753 Matricaria chamomilla var. coronata Matricaria suaveolens Matthiola stock Matthiola longipetala night scented stock Matthiola bicornis Matthiola longipetala ssp. bicornis Maurandella maurandella Maurandella antirrhiniflora roving sailor Antirrhinum maurandioides Asarina antirrhiniflora Maurandya antirrhiniflora Mecardonia mecardonia Mecardonia procumbens baby jump-up Mecardonia dianthera Mecardonia peduncularis Mecardonia tenuis Mecardonia vandellioides Medicago alfalfa Medicago lupulina black medick Medicago lupulina var. cupaniana Medicago lupulina var. glandulosa Medicago minima burr medick Medicago minima var. compacta Medicago minima var. longiseta Medicago minima var. pubescens Medicago polymorpha burclover Medicago apiculata Medicago denticulata Medicago hispida Medicago hispida var. apiculata Medicago hispida var. confinis Medicago polycarpa Medicago polymorpha var. brevispina Medicago polymorpha var. ciliaris Medicago polymorpha var. polygyra Medicago polymorpha var. tricycla Medicago polymorpha var. vulgaris Medicago sativa alfalfa Medicago sativa ssp. sativa alfalfa Medicago sativa ssp. varia Medicago xvaria Melampodium blackfoot Melampodium leucanthum plains blackfoot Melampodium longicorne Arizona blackfoot Melampodium strigosum shaggy blackfoot Melia melia Melia azedarach Chinaberrytree Melia azedarach var. umbraculifera Melica melicgrass Melica frutescens woody melicgrass Melica nitens threeflower melicgrass Melica porteri Porter's melicgrass Melica porteri var. laxa Porter's melicgrass Melica porteri var. porteri Porter's melicgrass Melilotus sweetclover Melilotus indicus annual yellow sweetclover Melilotus officinalis yellow sweetclover Melilotus albus Melilotus albus var. annuus Melinis stinkgrass Melinis repens rose Natal grass Rhynchelytrum repens Rhynchelytrum roseum Saccharum repens Tricholaena repens Tricholaena rosea Menodora menodora Menodora scabra rough menodora Menodora scoparia Menodora scabra var. glabrescens Menodora scabra var. laevis Menodora scabra var. longituba Menodora scabra var. ramosissima Menodora spinescens spiny menodora Menodora spinescens var. mohavensis Mentha mint Mentha arvensis wild mint Mentha arvensis ssp. borealis Mentha arvensis var. canadensis Mentha arvensis var. glabrata Mentha arvensis ssp. haplocalyx Mentha arvensis var. lanata Mentha arvensis var. sativa Mentha arvensis var. villosa Mentha canadensis Mentha gentilis Mentha glabrior Mentha penardii Mentha xrotundifolia pro sp. [longifolia x suaveolens] Mentha spicata spearmint Mentha cordifolia Mentha longifolia Mentha viridis Mentha suaveolens apple mint Mentha rotundifolia Mentzelia blazingstar Mentzelia affinis yellowcomet Mentzelia albicaulis whitestem blazingstar Acrolasia albicaulis Mentzelia albicaulis var. ctenophora Mentzelia albicaulis var. gracilis Mentzelia albicaulis var. tenerrima Mentzelia gracilis Mentzelia mojavensis Mentzelia aspera tropical blazingstar Mentzelia asperula Organ Mountain blazingstar Mentzelia collomiae Mentzelia cronquistii Cronquist's blazingstar Nuttallia cronquistii Mentzelia desertorum desert blazingstar Acrolasia desertorum Mentzelia incisa streambank blazingstar Mentzelia involucrata whitebract blazingstar Mentzelia involucrata var. involucrata whitebract blazingstar Mentzelia isolata isolated blazingstar Mentzelia jonesii Jones' blazingstar Mentzelia nitens var. jonesii Mentzelia lindheimeri Lindheimer's blazingstar Mentzelia multiflora Adonis blazingstar Mentzelia multiflora var. integra Adonis blazingstar Mentzelia integra Mentzelia pumila var. integra Mentzelia multiflora var. longiloba Adonis blazingstar Mentzelia longiloba Mentzelia multiflora ssp. longiloba Mentzelia multiflora var. multiflora Adonis blazingstar Mentzelia pumila var. multiflora Nuttallia multiflora Mentzelia nitens shining blazingstar Mentzelia nitens var. leptocaulis shining blazingstar Mentzelia nitens var. nitens shining blazingstar Mentzelia californica Mentzelia nuda bractless blazingstar Mentzelia nuda var. stricta bractless blazingstar Mentzelia stricta Nuttallia stricta Mentzelia obscura Pacific blazingstar Mentzelia oligosperma chickenthief Mentzelia oreophila Argus blazingstar Mentzelia puberula Mentzelia pterosperma wingseed blazingstar Nuttallia pterosperma Mentzelia pumila dwarf mentzelia Mentzelia pumila var. pumila dwarf mentzelia Mentzelia pumila var. procera Mentzelia rusbyi Rusby's blazingstar Mentzelia nuda var. rusbyi Nuttallia rusbyi Mentzelia tricuspis spinyhair blazingstar Mentzelia veatchiana Veatch's blazingstar Mentzelia albicaulis var. veatchiana Mentzelia gracilenta var. veatchiana Menyanthes buckbean Menyanthes trifoliata buckbean Menyanthes trifoliata var. minor Mertensia bluebells Mertensia arizonica aspen bluebells Mertensia arizonica var. grahamii Mertensia arizonica var. leonardii Mertensia arizonica var. subnuda Mertensia ciliata tall fringed bluebells Mertensia ciliata var. ciliata tall fringed bluebells Mertensia ciliata var. latiloba Mertensia ciliata var. subpubescens Pulmonaria ciliata Mertensia franciscana Franciscan bluebells Mertensia macdougalii Macdougal's bluebells Mertensia paniculata tall bluebells Mertensia paniculata var. paniculata tall bluebells Mertensia palmeri Mertensia pilosa Mesembryanthemum iceplant Mesembryanthemum crystallinum common iceplant Gasoul crystallinum Mesembryanthemum nodiflorum slenderleaf iceplant Gasoul nodiflorum Microchloa smallgrass Microchloa kunthii Kunth's smallgrass Paspalum tenuissimum Milla milla Milla biflora Mexican star Mimetanthe mimetanthe Mimetanthe pilosa false monkeyflower Mimulus pilosus Mimosa sensitive plant Mimosa aculeaticarpa catclaw mimosa Mimosa aculeaticarpa var. biuncifera catclaw mimosa Mimosopsis biuncifera Mimosa biuncifera Mimosa biuncifera var. glabrescens Mimosa biuncifera var. lindheimeri Mimosa lindheimeri Mimosa warnockii Mimosa dysocarpa velvetpod mimosa Mimosa dysocarpa var. wrightii Mimosa grahamii Graham's mimosa Mimosa grahamii var. lemmonii Mimosa laxiflora Arizona mimosa Mimulus monkeyflower Mimulus bigelovii Bigelow's monkeyflower Mimulus bigelovii var. bigelovii Bigelow's monkeyflower Eunanus bigelovii Mimulus bigelovii var. cuspidatus Mimulus cardinalis scarlet monkeyflower Diplacus cardinalis Erythranthe cardinalis Mimulus cardinalis var. exsul Mimulus cardinalis var. griseus Mimulus cardinalis var. rigens Mimulus dentilobus toothpetal monkeyflower Mimulus parvulus Mimulus eastwoodiae Eastwood's monkeyflower Mimulus cardinalis Mimulus floribundus manyflowered monkeyflower Mimulus deltoides Mimulus floribundus var. geniculatus Mimulus floribundus var. membranaceus Mimulus floribundus ssp. moorei Mimulus floribundus var. subulatus Mimulus geniculatus Mimulus membranaceus Mimulus multiflorus Mimulus peduncularis Mimulus pubescens Mimulus serotinus Mimulus subulatus Mimulus trisulcatus Mimulus glabratus roundleaf monkeyflower Mimulus glabratus var. glabratus roundleaf monkeyflower Mimulus glabratus ssp. typicus Mimulus glabratus ssp. utahensis Mimulus jamesii var. texensis Mimulus glabratus var. jamesii James' monkeyflower Mimulus geyeri Mimulus glabratus var. fremontii Mimulus inamoenus Mimulus jamesii Mimulus jamesii var. fremontii Mimulus reniformis Mimulus guttatus seep monkeyflower Mimulus arvensis Mimulus bakeri Mimulus brachystylis Mimulus clementinus Mimulus cordatus Mimulus cuspidata Mimulus decorus Mimulus equinnus Mimulus glareosus Mimulus glabratus var. ascendens Mimulus grandis Mimulus grandiflorus Mimulus guttatus ssp. arenicola Mimulus guttatus ssp. arvensis Mimulus guttatus var. arvensis Mimulus guttatus var. decorus Mimulus guttatus var. depauperatus Mimulus guttatus var. grandis Mimulus guttatus var. gracilis Mimulus guttatus ssp. haidensis Mimulus guttatus var. hallii Mimulus guttatus var. insignis Mimulus guttatus ssp. litoralis Mimulus guttatus var. lyratus Mimulus guttatus var. laxus Mimulus guttatus ssp. micranthus Mimulus guttatus var. microphyllus Mimulus guttatus var. nasutus Mimulus guttatus var. puberulus Mimulus guttatus ssp. scouleri Mimulus hallii Mimulus hirsutus Mimulus laxus Mimulus langsdorfii Mimulus langsdorfii var. argutus Mimulus langsdorfii var. arvensis Mimulus langsdorfii var. californicus Mimulus langsdorfii var. grandis Mimulus langsdorfii var. guttatus Mimulus langsdorfii var. insignis Mimulus langsdorfii var. microphyllus Mimulus langsdorfii var. minimus Mimulus langsdorfii var. nasutus Mimulus langsdorfii var. platyphyllus Mimulus longulus Mimulus luteus var. depauperatus Mimulus luteus var. gracilis Mimulus lyratus Mimulus maguirei Mimulus marmoratus Mimulus micranthus Mimulus microphyllus Mimulus nasutus Mimulus nasutus var. micranthus Mimulus parishii Mimulus paniculatus Mimulus pardalis Mimulus petiolaris Mimulus procerus Mimulus prionophyllus Mimulus puberulus Mimulus puncticalyx Mimulus rivularis Mimulus scouleri Mimulus subreniformis Mimulus tenellus Mimulus thermalis Mimulus unimaculatus Mimulus parryi annual redspot monkeyflower Mimulus spissus var. lincolnensis Mimulus primuloides primrose monkeyflower Mimulus primuloides var. primuloides primrose monkeyflower Mimulus nevadensis Mimulus pilosellus Mimulus primuloides var. minimus Mimulus primuloides var. pilosellus Mimulus rubellus little redstem monkeyflower Mimulus gratioloides Mimulus spissus compact monkeyflower Mimulus suksdorfii Suksdorf's monkeyflower Mimulus tilingii Tiling's monkeyflower Mimulus tilingii var. tilingii Tiling's monkeyflower Mimulus corallinus Mimulus implicatus Mimulus langsdorfii var. minor Mimulus langsdorfii var. tilingii Mimulus lucens Mimulus minor Mimulus minusculus Mimulus tilingii var. corallinus Mimulus veronicifolius Mimulus verbenaceus crimson monkeyflower Mimulus cardinalis var. verbenaceus Minuartia stitchwort Minuartia douglasii Douglas' stitchwort Arenaria douglasii Arenaria douglasii var. emarginata Arenaria emarginata Minuartia douglasii var. emarginata Minuartia filiorum threadbranch stitchwort Arenaria filiorum Arenaria rubella var. filiorum Minuartia obtusiloba twinflower sandwort Alsinopsis obtusiloba Arenaria obtusiloba Arenaria sajanensis Lidia obtusiloba Minuartia sajanensis Minuartia rubella beautiful sandwort Arenaria propinqua Arenaria rubella Arenaria verna var. propinqua Arenaria verna var. rubella Minuartia rossii var. orthotrichoides Tryphane rubella Mirabilis four o'clock Mirabilis albida white four o'clock Allionia albida Allionia bracteata Allionia coahuilensis Allionia grayana Allionia pauciflora Allionia pseudaggregata Allionia rotata Mirabilis albida var. lata Mirabilis albida var. uniflora Mirabilis coahuilensis Mirabilis dumetorum Mirabilis entricha Mirabilis grayana Mirabilis oblongifolia Mirabilis pauciflora Mirabilis pseudaggregata Mirabilis rotata Oxybaphus albidus Oxybaphus coahuilensis Oxybaphus pauciflorus Oxybaphus pseudaggregatus Oxybaphus rotatus Mirabilis bigelovii wishbone-bush Mirabilis bigelovii var. bigelovii wishbone-bush Hesperonia aspera Hesperonia bigelovii Mirabilis aspera Mirabilis bigelovii var. aspera Mirabilis bigelovii var. retrorsa wishbone-bush Mirabilis retrorsa Mirabilis coccinea scarlet four o'clock Oxybaphus coccineus Mirabilis comata hairy-tuft four o'clock Allionia comata Oxybaphus comatus Mirabilis decipiens broadleaf four o'clock Allionia decipiens Mirabilis linearis var. decipiens Oxybaphus linearis var. decipiens Mirabilis glabra smooth four o'clock Allionia carletonii Allionia ciliata Allionia exaltata Allionia glabra Mirabilis carletonii Mirabilis ciliata Mirabilis exaltata Oxybaphus carletonii Oxybaphus exaltatus Oxybaphus glaber Mirabilis hirsuta hairy four o'clock Allionia hirsuta Oxybaphus hirsutus Mirabilis jalapa marvel of Peru Mirabilis jalapa ssp. lindheimeri Mirabilis lindheimeri Mirabilis linearis narrowleaf four o'clock Allionia decumbens Allionia gausapoides Allionia linearis Calymenia decumbens Mirabilis decumbens Mirabilis diffusa Mirabilis gausapoides Mirabilis hirsuta var. linearis Mirabilis lanceolata Mirabilis linearis var. subhispida Oxybaphus angustifolius Oxybaphus decumbens Oxybaphus diffusus Oxybaphus gausapoides Oxybaphus lanceolatus Oxybaphus linearis Oxybaphus linearis var. subhispidus Mirabilis longiflora sweet four o'clock Mirabilis longiflora var. wrightiana sweet four o'clock Mirabilis wrightiana Mirabilis multiflora Colorado four o'clock Mirabilis multiflora var. glandulosa Colorado four o'clock Mirabilis glandulosa Mirabilis multiflora var. multiflora Colorado four o'clock Quamoclidion cordifolium Quamoclidion multiflorum Mirabilis oxybaphoides smooth spreading four o'clock Allioniella oxybaphoides Mirabilis pumila dwarf four o'clock Allionia pumila Oxybaphus pumilus Mirabilis tenuiloba longlobe four o'clock Hesperonia tenuiloba Mitracarpus girdlepod Mitracarpus breviflorus white girdlepod Modiola bristlemallow Modiola caroliniana Carolina bristlemallow Modiola multifida Mohavea mohavea Mohavea breviflora golden desert-snapdragon Mohavea confertiflora ghost flower Mollugo carpetweed Mollugo cerviana threadstem carpetweed Mollugo verticillata green carpetweed Mollugo berteriana Moluccella moluccella Moluccella laevis shellflower Monarda beebalm Monarda citriodora lemon beebalm Monarda citriodora ssp. austromontana lemon beebalm Monarda austromontana Monarda citriodora var. austromontana Monarda citriodora ssp. citriodora lemon beebalm Monarda citriodora ssp. citriodora var. citriodora lemon beebalm Monarda aristata Monarda dispersa Monarda tenuiaristata Monarda fistulosa wild bergamot Monarda fistulosa ssp. fistulosa wild bergamot Monarda fistulosa ssp. fistulosa var. menthifolia wild bergamot Monarda menthifolia Monarda pectinata pony beebalm Monardella monardella Monardella arizonica Arizona monardella Monardella glauca pale monardella Monardella odoratissima ssp. glauca Monardella odoratissima var. glauca Monardella odoratissima ssp. parvifolia Monardella odoratissima var. parvifolia Monardella lanceolata mustang monardella Monardella lanceolata var. lanceolata mustang monardella Monardella linoides flaxleaf monardella Monardella linoides ssp. linoides flaxleaf monardella Monardella linoides ssp. stricta flaxleaf monardella Moneses single delight Moneses uniflora single delight Moneses uniflora var. reticulata Moneses uniflora ssp. reticulata Pyrola uniflora Monnina monnina Monnina wrightii blue pygmyflower Monolepis povertyweed Monolepis nuttalliana Nuttall's povertyweed Monoptilon desertstar Monoptilon bellidiforme daisy desertstar Monoptilon bellioides Mojave desertstar Monotropa Indianpipe Monotropa hypopithys pinesap Hypopitys americana Hypopitys fimbriata Hypopitys insignata Hypopitys latisquama Hypopitys lanuginosa Hypopitys monotropa Monotropa hypopithys var. americana Monotropa hypopithys ssp. lanuginosa Monotropa hypopithys var. latisquama Monotropa hypopithys var. rubra Monotropa lanuginosa Monotropa latisquama Monroa false buffalograss Monroa squarrosa false buffalograss Monroa squarrosa var. floccuosa Montia minerslettuce Montia chamissoi water minerslettuce Claytonia chamissoi Crunocallis chamissoi Mortonia saddlebush Mortonia scabrella Rio Grande saddlebush Mortonia utahensis Utah mortonia Mortonia scabrella var. utahensis Morus mulberry Morus microphylla Texas mulberry Morus confinis Morus crataegifolia Morus grisea Morus radulina Muhlenbergia muhly Muhlenbergia andina foxtail muhly Muhlenbergia comata Muhlenbergia appressa Devils Canyon muhly Muhlenbergia arenacea ear muhly Muhlenbergia arenicola sand muhly Muhlenbergia arizonica Arizona muhly Muhlenbergia asperifolia scratchgrass Sporobolus asperifolius Muhlenbergia brevis short muhly Muhlenbergia curtifolia Utah muhly Muhlenbergia depauperata sixweeks muhly Muhlenbergia dubia pine muhly Muhlenbergia dumosa bamboo muhly Muhlenbergia elongata sycamore muhly Muhlenbergia xerophila Muhlenbergia eludens gravelbar muhly Muhlenbergia emersleyi bullgrass Muhlenbergia filiculmis slimstem muhly Muhlenbergia filiformis pullup muhly Muhlenbergia filiformis var. fortis Muhlenbergia idahoensis Muhlenbergia simplex Muhlenbergia fragilis delicate muhly Muhlenbergia glauca desert muhly Muhlenbergia lemmonii Muhlenbergia gooddingii Goodding's muhly Muhlenbergia longiligula longtongue muhly Muhlenbergia mexicana Mexican muhly Agrostis mexicana Muhlenbergia ambigua Muhlenbergia foliosa Muhlenbergia foliosa ssp. ambigua Muhlenbergia foliosa ssp. setiglumis Muhlenbergia mexicana var. filiformis Muhlenbergia microsperma littleseed muhly Muhlenbergia debilis Muhlenbergia minutissima annual muhly Sporobolus confusus Muhlenbergia montana mountain muhly Muhlenbergia palmeri southwestern muhly Muhlenbergia dubioides Muhlenbergia pauciflora New Mexico muhly Muhlenbergia pectinata combtop muhly Muhlenbergia peruviana Peruvian muhly Muhlenbergia pulcherrima Muhlenbergia polycaulis cliff muhly Muhlenbergia porteri bush muhly Muhlenbergia pungens sandhill muhly Muhlenbergia racemosa marsh muhly Agrostis racemosa Muhlenbergia ramulosa green muhly Muhlenbergia wolfii Sporobolus ramulosus Muhlenbergia repens creeping muhly Muhlenbergia richardsonis mat muhly Muhlenbergia squarrosa Muhlenbergia rigens deergrass Epicampes rigens Muhlenbergia marshii Muhlenbergia mundula Muhlenbergia rigida purple muhly Muhlenbergia metcalfei Muhlenbergia setifolia curlyleaf muhly Muhlenbergia sinuosa marshland muhly Muhlenbergia sylvatica woodland muhly Agrostis sylvatica Muhlenbergia sylvatica var. robusta Muhlenbergia umbrosa Muhlenbergia tenuifolia slimflower muhly Muhlenbergia monticola Muhlenbergia texana Texas muhly Muhlenbergia thurberi Thurber's muhly Muhlenbergia torreyi ring muhly Muhlenbergia gracillima Muhlenbergia utilis aparejograss Muhlenbergia virescens screwleaf muhly Muhlenbergia straminea Muhlenbergia wrightii spike muhly Myosotis forget-me-not Myosotis scorpioides true forget-me-not Myosotis palustris Myosotis verna spring forget-me-not Myosotis virginica Myosurus mousetail Myosurus apetalus bristly mousetail Myosurus apetalus var. montanus bristly mousetail Myosurus aristatus ssp. montanus Myosurus minimus ssp. montanus Myosurus cupulatus Arizona mousetail Myosurus minimus tiny mousetail Myosurus clavicaulis Myosurus lepturus Myosurus minimus ssp. apus Myosurus minimus var. apus Myosurus minimus var. clavicaulis Myosurus minimus var. filiformis Myosurus minimus var. interior Myosurus minimus var. lepturus Myosurus minimus ssp. major Myosurus minimus var. major Myosurus nitidus western mousetail Myosurus egglestonii Myriophyllum watermilfoil Myriophyllum aquaticum parrot feather watermilfoil Enydria aquatica Myriophyllum brasiliense Myriophyllum proserpinacoides Myriophyllum quitense Andean watermilfoil Myriophyllum elatinoides Myriophyllum sibiricum shortspike watermilfoil Myriophyllum exalbescens Myriophyllum exalbescens var. magdalenense Myriophyllum magdalenense Myriophyllum spicatum var. capillaceum Myriophyllum spicatum var. exalbescens Myriophyllum spicatum ssp. exalbescens Myriophyllum spicatum ssp. squamosum Myriophyllum spicatum var. squamosum Najas waternymph Najas flexilis nodding waternymph Caulinia flexilis Najas caespitosa Najas flexilis ssp. caespitosa Najas flexilis var. congesta Najas flexilis var. robusta Najas guadalupensis southern waternymph Najas guadalupensis ssp. guadalupensis southern waternymph Caulinia guadalupensis Najas marina spiny naiad Najas gracilis Najas major Najas major var. angustifolia Najas marina var. recurvata Nama fiddleleaf Nama arizonicum Arizona fiddleleaf Nama demissum purplemat Nama demissum var. demissum purplemat Nama demissum var. deserti Nama dichotomum wishbone fiddleleaf Nama hispidum bristly nama Nama foliosum Nama hispidum var. mentzelii Nama hispidum var. revolutum Nama hispidum var. spathulatum Nama tenue Nama pusillum eggleaf fiddleleaf Nama retrorsum betatakin fiddleleaf Nama rothrockii Rothrock's fiddleleaf Nama stenocarpum mud fiddleleaf Nassella tussockgrass Nassella viridula green needlegrass Stipa viridula Navarretia pincushionplant Navarretia breweri Brewer's navarretia Navarretia intertexta needleleaf navarretia Navarretia intertexta ssp. propinqua near navarretia Gilia propinqua Navarretia intertexta var. propinqua Navarretia propinqua Navarretia leucocephala whitehead navarretia Navarretia leucocephala ssp. minima least navarretia Navarretia minima Nemacaulis cottonheads Nemacaulis denudata cottonheads Nemacaulis denudata var. gracilis cottonheads Nemacladus threadplant Nemacladus glanduliferus glandular threadplant Nemacladus glanduliferus var. glanduliferus glandular threadplant Nemacladus glanduliferus var. orientalis glandular threadplant Nemacladus gracilis slender threadplant Nemacladus longiflorus longflower threadplant Nemacladus longiflorus var. breviflorus longflower threadplant Nemacladus longiflorus var. longiflorus longflower threadplant Nemacladus rubescens desert threadplant Nemacladus rubescens var. rubescens desert threadplant Nemacladus sigmoideus sigmoid threadplant Nemastylis pleatleaf Nemastylis tenuis southwestern pleatleaf Nemastylis tenuis ssp. pringlei Pringle's pleatleaf Nemastylis pringlei Nemastylis tenuis var. pringlei Neogaerrhinum neogaerrhinum Neogaerrhinum filipes Filipes snapdragon Antirrhinum cooperi Antirrhinum filipes Asarina filipes Nepeta catnip Nepeta cataria catnip Nicotiana tobacco Nicotiana attenuata coyote tobacco Nicotiana clevelandii Cleveland's tobacco Nicotiana glauca tree tobacco Nicotiana obtusifolia desert tobacco Nicotiana obtusifolia var. obtusifolia desert tobacco Nicotiana trigonophylla Nicotiana obtusifolia var. palmeri desert tobacco Nicotiana palmeri Nicotiana trigonophylla var. palmeri Nissolia yellowhood Nissolia schottii Schott's yellowhood Nissolia wislizeni Arizona yellowhood Nitrophila niterwort Nitrophila occidentalis boraxweed Nolina beargrass Nolina bigelovii Bigelow's nolina Nolina microcarpa sacahuista Nolina parryi Parry's beargrass Nolina bigelovii var. parryi Nolina bigelovii var. wolfii Nolina parryi ssp. wolfii Nolina wolfii Nolina texana Texas sacahuista Nolina affinis Nolina texana var. compacta Notholaena cloak fern Notholaena aschenborniana scaled cloak fern Cheilanthes aschenborniana Notholaena californica California cloak fern Notholaena californica ssp. californica California cloak fern Aleuritopteris cretacea Aleuritopteris cretacea ssp. nigrescens Cheilanthes deserti Notholaena candida var. accessita Notholaena californica ssp. nigrescens Notholaena grayi Gray's cloak fern Notholaena grayi ssp. grayi Gray's cloak fern Cheilanthes grayi Notholaena grayi ssp. sonorensis Sonoran cloak fern Notholaena lemmonii Lemmon's cloak fern Cheilanthes lemmonii Notholaena neglecta Maxon's cloak fern Cheilanthes neglecta Notholaena standleyi star cloak fern Cheilanthes hookeri Cheilanthes standleyi Nothoscordum false garlic Nothoscordum texanum Texas false garlic Nuphar pond-lily Nuphar lutea yellow pond-lily Nuphar lutea ssp. polysepala Rocky Mountain pond-lily Nuphar polysepala Nymphaea polysepala Nymphozanthus polysepalus Nuttallanthus toadflax Nuttallanthus texanus Texas toadflax Linaria canadensis var. texana Linaria texana Nymphaea waterlily Nymphaea mexicana yellow waterlily Castalia flava Nymphaea odorata American white waterlily Nymphaea odorata ssp. odorata American white waterlily Castalia lekophylla Castalia minor Castalia odorata Castalia reniformis Nymphaea minor Nymphaea odorata var. gigantea Nymphaea odorata var. godfreyi Nymphaea odorata var. minor Nymphaea odorata var. rosea Nymphaea odorata var. stenopetala Nymphaea odorata var. villosa Nymphoides floatingheart Nymphoides peltata yellow floatingheart Limnanthemum peltatum Nymphoides nymphaeoides Oenothera evening-primrose Oenothera albicaulis whitest evening-primrose Anogra albicaulis Oenothera ctenophylla Oenothera brachycarpa shortfruit evening-primrose Lavauxia brachycarpa Megapterium brachycarpum Oenothera brachycarpa var. wrightii Oenothera caespitosa var. australis Oenothera caespitosa ssp. australis Oenothera cespitosa ssp. australis [orthographic variant] Oenothera cespitosa var. australis [orthographic variant] Oenothera caespitosa tufted evening-primrose Oenothera cespitosa [orthographic variant] Oenothera caespitosa ssp. crinita tufted evening-primrose Oenothera caespitosa var. crinita Oenothera caespitosa var. jonesii Oenothera caespitosa ssp. jonesii Oenothera cespitosa ssp. crinita [orthographic variant] Oenothera cespitosa var. crinita [orthographic variant] Oenothera cespitosa var. jonesii [orthographic variant] Oenothera cespitosa ssp. jonesii [orthographic variant] Oenothera caespitosa ssp. marginata tufted evening-primrose Oenothera caespitosa var. marginata Oenothera cespitosa var. marginata [orthographic variant] Oenothera cespitosa ssp. marginata [orthographic variant] Oenothera caespitosa ssp. navajoensis Navajo evening-primrose Oenothera caespitosa var. navajoensis Oenothera cespitosa ssp. navajoensis [orthographic variant] Oenothera cespitosa var. navajoensis [orthographic variant] Oenothera californica California evening-primrose Oenothera californica ssp. arizonica California evening-primrose Oenothera arizonica Oenothera avita ssp. arizonica Oenothera deltoides var. arizonica Oenothera californica ssp. avita California evening-primrose Oenothera avita Oenothera cavernae cavedwelling evening-primrose Oenothera coronopifolia crownleaf evening-primrose Anogra coronopifolia Oenothera deltoides birdcage evening-primrose Oenothera deltoides ssp. ambigua birdcage evening-primrose Oenothera deltoides var. decumbens Oenothera deltoides ssp. deltoides birdcage evening-primrose Oenothera deltoides var. cineracea Oenothera deltoides var. typica Oenothera elata Hooker's evening-primrose Oenothera elata ssp. hirsutissima Hooker's evening-primrose Oenothera biennis var. hirsutissima Oenothera elata var. hirsutissima Oenothera elata ssp. texensis Oenothera hookeri var. angustifolia Oenothera hookeri ssp. angustifolia Oenothera hookeri ssp. grisea Oenothera hookeri var. hewettii Oenothera hookeri var. hirsutissima Oenothera hookeri ssp. hirsutissima Oenothera hookeri ssp. hewettii Oenothera hookeri ssp. ornata Oenothera hookeri var. ornata Oenothera hookeri ssp. venusta Oenothera ornata Oenothera simsiana Oenothera flava yellow evening-primrose Oenothera flava ssp. flava yellow evening-primrose Lavauxia flava Oenothera flava ssp. taraxacoides yellow evening-primrose Lavauxia taraxacoides Oenothera taraxacoides Oenothera havardii Havard's evening-primrose Oenothera kunthiana Kunth's evening-primrose Oenothera longissima longstem evening-primrose Oenothera longissima ssp. clutei Oenothera longissima var. clutei Oenothera longissima ssp. typica Oenothera neomexicana New Mexico evening-primrose Oenothera pallida pale evening-primrose Oenothera pallida ssp. pallida pale evening-primrose Oenothera pallida var. idahoensis Oenothera pallida var. typica Oenothera pallida ssp. runcinata pale evening-primrose Oenothera pallida var. runcinata Oenothera runcinata Oenothera runcinata var. brevifolia Oenothera runcinata var. leucotricha Oenothera runcinata var. typica Oenothera platanorum Fort Huachuca evening-primrose Oenothera primiveris desert evening-primrose Oenothera primiveris ssp. bufonis desert evening-primrose Oenothera primiveris var. bufonis Oenothera primiveris ssp. primiveris desert evening-primrose Oenothera primiveris ssp. caulescens Oenothera primiveris var. caulescens Oenothera pubescens South American evening-primrose Oenothera amplexicaulis Oenothera laciniata ssp. pubescens Oenothera laciniata var. pubescens Oenothera rosea rose evening-primrose Oenothera speciosa pinkladies Hartmannia speciosa Oenothera delessertiana Oenothera speciosa var. childsii Oenothera villosa hairy evening-primrose Oenothera villosa ssp. strigosa hairy evening-primrose Oenothera biennis var. strigosa Oenothera cheradophila Oenothera depressa ssp. strigosa Oenothera procera Oenothera rydbergii Oenothera strigosa Oenothera strigosa ssp. cheradophila Oenothera villosa ssp. cheradophila Oenothera villosa var. strigosa Oligomeris oligomeris Oligomeris linifolia lineleaf whitepuff Olneya olneya Olneya tesota desert ironwood Onopordum cottonthistle Onopordum acanthium Scotch cottonthistle Ophioglossum adderstongue Ophioglossum engelmannii limestone adderstongue Ophioglossum vulgatum southern adderstongue Ophioglossum pycnostichum Ophioglossum vulgatum var. pycnostichum Opuntia pricklypear Opuntia acanthocarpa buckhorn cholla Opuntia acanthocarpa var. acanthocarpa buckhorn cholla Opuntia acanthocarpa var. coloradensis Colorado buckhorn cholla Opuntia acanthocarpa var. major buckhorn cholla Opuntia echinocarpa var. major Opuntia acanthocarpa var. thornberi Thornber's buckhorn cholla Opuntia thornberi Opuntia arbuscula Arizona pencil cholla Opuntia aurea golden pricklypear Opuntia basilaris var. aurea Opuntia erinacea var. aurea Opuntia basilaris beavertail pricklypear Opuntia basilaris var. basilaris beavertail pricklypear Opuntia basilaris var. ramosa Opuntia basilaris var. whitneyana Opuntia brachyclada ssp. humistrata Opuntia whitneyana Opuntia whitneyana var. albiflora Opuntia basilaris var. longiareolata beavertail pricklypear Opuntia longiareolata Opuntia bigelovii teddybear cholla Opuntia chlorotica dollarjoint pricklypear Opuntia clavata club cholla Opuntia xcongesta pro sp. [acanthocarpa x whipplei] Opuntia xcurvospina pro sp. [chlorotica x phaeacantha] searchlight pricklypear Opuntia discata smallfruit pricklypear Opuntia microcarpa Opuntia echinocarpa golden cholla Opuntia engelmannii cactus apple Opuntia engelmannii var. engelmannii cactus apple Opuntia dillei Opuntia megacarpa Opuntia occidentalis var. megacarpa Opuntia phaeacantha var. discata Opuntia engelmannii var. flavispina cactus apple Opuntia phaeacantha var. flavispina Opuntia erinacea grizzlybear pricklypear Opuntia erinacea var. erinacea grizzlybear pricklypear Opuntia erinacea var. hystricina grizzlybear pricklypear Opuntia hystricina Opuntia erinacea var. ursina grizzlybear pricklypear Opuntia rubrifolia Opuntia ursina Opuntia erinacea var. utahensis Utah grizzlybear pricklypear Opuntia erinacea var. paucispina Opuntia erinacea var. xanthostemma Opuntia rhodantha Opuntia rhodantha var. spinosior Opuntia sphaerocarpa var. utahensis Opuntia ficus-indica tuna cactus Cactus ficus-indica Opuntia compressa Opuntia vulgaris Opuntia fragilis brittle pricklypear Opuntia fragilis var. brachyarthra brittle pricklypear Opuntia brachyarthra Opuntia fragilis ssp. brachyarthra Opuntia fragilis var. fragilis brittle pricklypear Cactus fragilis Opuntia fragilis var. denudata Opuntia schweriniana Opuntia fulgida jumping cholla Opuntia fulgida var. fulgida jumping cholla Opuntia fulgida var. mamillata jumping cholla Opuntia mamillata Opuntia gosseliniana violet pricklypear Opuntia chlorotica var. gosseliniana Opuntia violacea var. gosseliniana Opuntia imbricata tree cholla Opuntia imbricata var. imbricata tree cholla Cereus imbricatus Cylindropuntia imbricata Opuntia arborescens Opuntia imbricata var. arborescens Opuntia imbricata var. vexans Opuntia xkelvinensis Opuntia kunzei devil's cholla Opuntia emoryi Opuntia stanlyi Opuntia stanlyi var. kunzei Opuntia stanlyi var. peeblesiana Opuntia wrightiana Opuntia leptocaulis Christmas cactus Opuntia littoralis coastal pricklypear Opuntia littoralis var. vaseyi Vasey's coastal pricklypear Opuntia covillei Opuntia occidentalis var. covillei Opuntia occidentalis var. vaseyi Opuntia vaseyi Opuntia macrocentra purple pricklypear Opuntia macrocentra var. macrocentra purple pricklypear Opuntia violacea Opuntia violacea var. castetteri Opuntia violacea var. macrocentra Opuntia macrorhiza twistspine pricklypear Opuntia macrorhiza var. macrorhiza twistspine pricklypear Opuntia compressa var. grandiflora Opuntia compressa var. macrorhiza Opuntia compressa var. stenochila Opuntia grandiflora Opuntia leptocarpa Opuntia mackensenii Opuntia plumbea Opuntia tortispina Opuntia macrorhiza var. pottsii twistspine pricklypear Opuntia ballii Opuntia phaeacantha var. tenuispina Opuntia pottsii Opuntia tenuiflora Opuntia tenuispina Opuntia martiniana seashore cactus Opuntia littoralis var. martiniana Opuntia macrocentra var. martiniana Opuntia nicholii Navajo Bridge pricklypear Opuntia parishii matted cholla Opuntia emoryi Opuntia stanlyi var. parishii Opuntia phaeacantha tulip pricklypear Opuntia phaeacantha var. laevis tulip pricklypear Opuntia laevis Opuntia phaeacantha var. major Mojave pricklypear Opuntia arizonica Opuntia canada Opuntia engelmannii var. cycloides Opuntia gilvescens Opuntia mojavensis Opuntia phaeacantha var. brunnea Opuntia phaeacantha var. mojavensis Opuntia woodsii Opuntia phaeacantha var. phaeacantha tulip pricklypear Opuntia dulcis Opuntia phaeacantha var. nigricans Opuntia pinkavae Pinkava's pricklypear Opuntia basilaris var. woodburyi Opuntia polyacantha plains pricklypear Opuntia polyacantha var. juniperina Juniper pricklypear Opuntia juniperina Opuntia sphaerocarpa Opuntia polyacantha var. polyacantha hairspine pricklypear Opuntia polyacantha var. rufispina hairspine pricklypear Opuntia rutila Opuntia polyacantha var. trichophora hairspine pricklypear Opuntia missouriensis var. trichophora Opuntia trichophora Opuntia pulchella sagebrush cholla Opuntia barkleyana Opuntia brachyrhopalica Opuntia gracilicylindrica Opuntia pygmaea Opuntia spectatissima Opuntia tuberculosirhopalica Opuntia wiegandii Opuntia ramosissima branched pencil cholla Opuntia santa-rita Santa Rita pricklypear Opuntia chlorotica var. santa-rita Opuntia violacea var. santa-rita Opuntia spinosior walkingstick cactus Opuntia whipplei var. spinosior Opuntia superbospina Kingman pricklypear Opuntia phaeacantha var. superbospina Opuntia xtetracantha pro sp. [acanthocarpa x leptocaulis] Opuntia californica Opuntia kleiniae var. tetracantha Opuntia versicolor staghorn cholla Opuntia xvivipara pro sp. [arbuscula x versicolor] Opuntia whipplei Whipple cholla Cylindropuntia whipplei Opuntia wigginsii Wiggins' cholla Oreochrysum goldenrod Oreochrysum parryi Parry's goldenrod Haplopappus parryi Solidago parryi Oreoxis oreoxis Oreoxis alpina alpine oreoxis Oreoxis alpina ssp. alpina alpine oreoxis Cymopterus alpinus Orobanche broomrape Orobanche cooperi desert broomrape Orobanche cooperi ssp. cooperi desert broomrape Aphyllon cooperi Myzorrhiza cooperi Orobanche ludoviciana var. cooperi Orobanche cooperi ssp. latiloba desert broomrape Orobanche ludoviciana var. latiloba Orobanche fasciculata clustered broomrape Anoplanthus fasciculatus Aphyllon fasciculatum Orobanche fasciculata var. franciscana Orobanche fasciculata var. lutea Orobanche fasciculata var. subulata Orobanche fasciculata var. typica Thalesia fasciculata Thalesia lutea Orobanche ludoviciana Louisiana broomrape Orobanche ludoviciana ssp. ludoviciana Louisiana broomrape Aphyllon arenosum Conopholis ludoviciana Myzorrhiza ludoviciana Orobanche ludoviciana var. arenosa Orobanche ludoviciana var. genuina Orobanche multiflora var. arenosa Orobanche ludoviciana ssp. multiflora manyflower broomrape Myzorrhiza multiflora Orobanche ludoviciana var. multiflora Orobanche multiflora Orobanche multiflora var. pringlei Orobanche multiflora var. typica Phelipaea erianthera Orobanche multicaulis spiked broomrape Orobanche multicaulis var. genuina Orobanche uniflora oneflowered broomrape Aphyllon uniflorum Orobanche porphyrantha Orobanche purpurea Orobanche sedii Orobanche terrae-novae Orobanche uniflora var. minuta Orobanche uniflora ssp. occidentalis Orobanche uniflora var. occidentalis Orobanche uniflora var. purpurea Orobanche uniflora var. sedii Orobanche uniflora var. terrae-novae Orobanche uniflora var. typica Thalesia uniflora Orthilia orthilia Orthilia secunda sidebells wintergreen Orthilia secunda ssp. obtusata Orthilia secunda var. obtusata Pyrola secunda Pyrola secunda var. obtusata Pyrola secunda ssp. obtusata Ramischia elatior Ramischia secunda Orthocarpus owl's-clover Orthocarpus luteus yellow owl's-clover Orthocarpus purpureoalbus purplewhite owl's-clover Osmorhiza sweetroot Osmorhiza berteroi sweetcicely Osmorhiza brevipes Osmorhiza chilensis Osmorhiza divaricata Osmorhiza nuda Washingtonia divaricata Osmorhiza brachypoda California sweetcicely Osmorhiza brachypoda var. fraterna Osmorhiza depauperata bluntseed sweetroot Osmorhiza chilensis var. cupressimontana Osmorhiza obtusa Washingtonia obtusa Ostrya hophornbean Ostrya knowltonii Knowlton's hophornbeam Oxalis woodsorrel Oxalis albicans radishroot woodsorrel Oxalis albicans ssp. californica California woodsorrel Oxalis californica Oxalis albicans ssp. pilosa radishroot woodsorrel Oxalis corniculata ssp. pilosa Oxalis corniculata var. pilosa Oxalis pilosa Oxalis wrightii var. pilosa Xanthoxalis pilosa Oxalis alpina alpine woodsorrel Oxalis metcalfei Oxalis monticola Oxalis corniculata creeping woodsorrel Acetosella corniculata Oxalis corniculata var. atropurpurea Oxalis corniculata var. lupulina Oxalis corniculata var. langloisii Oxalis corniculata var. macrophylla Oxalis corniculata var. minor Oxalis corniculata var. reptans Oxalis corniculata var. villosa Oxalis corniculata var. viscidula Oxalis langloisii Oxalis pusilla Oxalis repens Oxalis villosa Xanthoxalis corniculata Xanthoxalis corniculata var. atropurpurea Xanthoxalis langloisii Xanthoxalis repens Oxalis decaphylla tenleaf woodsorrel Oxalis grayi Oxalis drummondii Drummond's woodsorrel Oxalis amplifolia Oxalis pes-caprae Bermuda buttercup Bolboxalis cernua Oxalis cernua Oxalis stricta common yellow oxalis Ceratoxalis coloradensis Ceratoxalis cymosa Oxalis brittoniae Oxalis bushii Oxalis coloradensis Oxalis corniculata var. dillenii Oxalis cymosa Oxalis dillenii Oxalis dillenii ssp. filipes Oxalis dillenii var. radicans Oxalis europaea Oxalis europaea var. bushii Oxalis europaea var. rufa Oxalis filipes Oxalis florida Oxalis florida var. filipes Oxalis florida ssp. prostrata Oxalis fontana Oxalis fontana var. bushii Oxalis interior Oxalis prostrata Oxalis rupestris Oxalis rufa Oxalis stricta var. decumbens Oxalis stricta var. piletocarpa Oxalis stricta var. rufa Oxalis stricta var. villicaulis Xanthoxalis brittoniae Xanthoxalis bushii Xanthoxalis coloradensis Xanthoxalis cymosa Xanthoxalis dillenii Xanthoxalis dillenii var. piletocarpa Xanthoxalis filipes Xanthoxalis florida Xanthoxalis interior Xanthoxalis rufa Xanthoxalis stricta Xanthoxalis stricta var. piletocarpa Oxalis violacea violet woodsorrel Ionoxalis violacea Oxalis violacea var. trichophora Oxypolis cowbane Oxypolis fendleri Fendler's cowbane Oxyria mountainsorrel Oxyria digyna alpine mountainsorrel Rumex digyna Oxytheca oxytheca Oxytheca perfoliata roundleaf oxytheca Oxytropis locoweed Oxytropis lambertii purple locoweed Oxytropis lambertii var. bigelovii purple locoweed Oxytropis lambertii ssp. bigelovii Oxytropis patens Oxytropis oreophila mountain oxytrope Oxytropis oreophila var. oreophila mountain oxytrope Aragallus oreophilus Spiesia oreophila Pachycereus pachycereus Pachycereus schottii senita cactus Cereus schottii Lophocereus schottii Packera ragwort Packera cardamine bittercress ragwort Senecio cardamine Packera cynthioides White Mountain ragwort Senecio cynthioides Senecio wrightii Packera franciscana San Francisco Peaks ragwort Senecio franciscanus Packera hartiana Hart's ragwort Senecio hartianus Packera multilobata lobeleaf groundsel Senecio lynceus Senecio lynceus var. leucoreus Senecio multilobatus Senecio stygius Senecio thornberi Senecio uintahensis Packera neomexicana New Mexico groundsel Packera neomexicana var. metcalfei Metcalf's groundsel Senecio metcalfei Senecio neomexicanus var. metcalfei Packera neomexicana var. mutabilis New Mexico groundsel Senecio mutabilis Senecio neomexicanus var. mutabilis Packera neomexicana var. neomexicana New Mexico groundsel Senecio eurypterus Senecio neomexicanus Senecio neomexicanus var. griffithsii Senecio oresbius Senecio thurberi Packera neomexicana var. toumeyi Toumey's groundsel Senecio neomexicanus var. toumeyi Senecio toumeyi Packera plattensis prairie groundsel Senecio plattensis Senecio pseudotomentosus Packera quaerens Mogollon Mountain ragwort Senecio quaerens Packera quercetorum Oak Creek ragwort Senecio quercetorum Packera werneriifolia hoary groundsel Senecio aureus var. werneriifolius Senecio molinarius Senecio muirii Senecio saxosus Senecio saxosus var. toiyabensis Senecio werneriifolius Senecio werneriifolius var. incertus Palafoxia palafox Palafoxia arida desert palafox Palafoxia arida var. arida desert palafox Palafoxia arida var. gigantea giant Spanish needle Palafoxia linearis var. gigantea Panicum panicgrass Panicum alatum winged panicgrass Panicum alatum var. alatum winged panicgrass Panicum alatum var. minus winged panicgrass Panicum hirticaule var. minus Panicum antidotale blue panicum Panicum bulbosum bulb panicgrass Panicum bulbosum var. minor Panicum plenum Panicum capillare witchgrass Panicum barbipulvinatum Panicum capillare var. agreste Panicum capillare ssp. barbipulvinatum Panicum capillare var. brevifolium Panicum capillare var. barbipulvinatum Panicum capillare var. occidentale Panicum dichotomiflorum fall panicgrass Panicum dichotomiflorum var. dichotomiflorum fall panicgrass Panicum dichotomiflorum var. geniculatum Panicum hallii Hall's panicgrass Panicum hallii var. hallii Hall's panicgrass Panicum lepidulum Panicum hirticaule Mexican panicgrass Panicum hirticaule var. hirticaule Mexican panicgrass Panicum capillare var. hirticaule Panicum capillare var. pampinosum Panicum hirticaule var. pampinosum Panicum pampinosum Panicum hirticaule var. stramineum Sonoran panicgrass Panicum capillare var. stramineum Panicum stramineum Panicum hirticaule var. verrucosum Mexican panicgrass Panicum miliaceum broomcorn millet Panicum miliaceum ssp. miliaceum broomcorn millet Panicum mohavense Mojave panicgrass Panicum obtusum vine mesquite Panicum sonorum sauwi Panicum capillare var. miliaceum Panicum hirticaule var. miliaceum Panicum urvilleanum desert panicgrass Panicum virgatum switchgrass Panicum virgatum var. virgatum switchgrass Panicum virgatum var. cubense Panicum virgatum var. obtusum Papaver poppy Papaver somniferum opium poppy Papaver somniferum var. setigerum Pappophorum pappusgrass Pappophorum bicolor pink pappusgrass Pappophorum vaginatum whiplash pappusgrass Pappophorum apertum Pappophorum mucronulatum Pappophorum suffulbosum Paraserianthes paraserianthes Paraserianthes lophantha plume albizia Albizia distachya Albizia lophantha Parietaria pellitory Parietaria hespera rillita pellitory Parietaria hespera var. hespera rillita pellitory Parietaria pensylvanica Pennsylvania pellitory Parietaria obtusa Parietaria occidentalis Parietaria pensylvanica var. obtusa Parkinsonia paloverde Parkinsonia aculeata Jerusalem thorn Parkinsonia florida blue paloverde Cercidium floridum Parkinsonia microphylla yellow paloverde Cercidium microphyllum Parnassia grass of Parnassus Parnassia palustris marsh grass of Parnassus Parnassia palustris var. montanensis mountain grass of Parnassus Parnassia montanensis Paronychia nailwort Paronychia jamesii James' nailwort Paronychia jamesii var. hirsuta Paronychia jamesii var. parviflora Paronychia jamesii var. praelongifolia Paronychia wardii Paronychia sessiliflora creeping nailwort Parryella parryella Parryella filifolia common dunebroom Parthenice parthenice Parthenice mollis annual monsterwort Parthenium feverfew Parthenium confertum Gray's feverfew Parthenium confertum var. lyratum Gray's feverfew Parthenium hysterophorus var. lyratum Parthenium lyratum Parthenium incanum mariola Parthenocissus creeper Parthenocissus vitacea woodbine Pascopyrum wheatgrass Pascopyrum smithii western wheatgrass Agropyron molle Agropyron smithii Agropyron smithii var. molle Agropyron smithii var. palmeri Elymus smithii Elytrigia smithii Elytrigia smithii var. mollis Paspalidium watercrown grass Paspalidium philippianum Philippine watercrown grass Paspalidium macrospermum Paspalum crowngrass Paspalum dilatatum dallisgrass Paspalum distichum knotgrass Digitaria paspaloides Paspalum distichum var. indutum Paspalum paspaloides Paspalum setaceum thin paspalum Paspalum bushii Paspalum ciliatifolium Paspalum ciliatifolium var. muehlenbergii Paspalum ciliatifolium var. stramineum Paspalum debile Paspalum longepedunculatum Paspalum muehlenbergii Paspalum propinquum Paspalum psammophilum Paspalum pubescens Paspalum rigidifolium Paspalum separatum Paspalum setaceum var. calvescens Paspalum setaceum var. ciliatifolium Paspalum setaceum var. longepedunculatum Paspalum setaceum var. muehlenbergii Paspalum setaceum var. psammophilum Paspalum setaceum var. rigidifolium Paspalum setaceum var. stramineum Paspalum setaceum var. supinum Paspalum setaceum var. villosissimum Paspalum stramineum Paspalum supinum Paspalum virletii Virlet's paspalum Passiflora passionflower Passiflora bryonioides cupped passionflower Passiflora foetida fetid passionflower Passiflora foetida var. arizonica Arizonia passionflower Passiflora mexicana Mexican passionflower Pastinaca parsnip Pastinaca sativa wild parsnip Pastinaca sativa var. pratensis Paxistima paxistima Paxistima myrsinites Oregon boxleaf Pectis cinchweed Pectis angustifolia lemonscent Pectis angustifolia var. angustifolia narrowleaf pectis Pectis cylindrica Sonoran cinchweed Pectis postrata var. cylindrica Pectis filipes fivebract cinchweed Pectis filipes var. subnuda fivebract cinchweed Pectis imberbis beardless cinchweed Pectis linifolia romero macho Pectis longipes longstalk cinchweed Pectis papposa manybristle cinchweed Pectis papposa var. grandis manybristle cinchweed Pectis papposa var. papposa manybristle cinchweed Pectis prostrata spreading cinchweed Pectis multisetosa Pectis prostrata var. urceolata Pectis rusbyi Rusby's cinchweed Pectis palmeri Pectocarya combseed Pectocarya heterocarpa chuckwalla combseed Pectocarya penicillata var. heterocarpa Pectocarya penicillata sleeping combseed Cynoglossum penicillatum Pectocarya linearis var. penicillata Pectocarya platycarpa broadfruit combseed Pectocarya gracilis var. platycarpa Pectocarya linearis var. platycarpa Pectocarya recurvata curvenut combseed Pectocarya setosa moth combseed Pedicularis lousewort Pedicularis centranthera dwarf lousewort Pedicularis centranthera var. exulans Pedicularis groenlandica elephanthead lousewort Elephantella groenlandica Pedicularis groenlandica ssp. surrecta Pedicularis groenlandica var. surrecta Pedicularis parryi Parry's lousewort Pedicularis parryi ssp. mogollonica Mogollon lousewort Pedicularis mogollonica Pedicularis parryi var. mogollonica Pedicularis parryi ssp. parryi Parry's lousewort Pedicularis procera giant lousewort Pedicularis grayi Pedicularis racemosa sickletop lousewort Pedicularis racemosa ssp. alba sickletop lousewort Pedicularis racemosa var. alba Pediocactus hedgehog cactus Pediocactus bradyi Brady's hedgehog cactus Pediocactus paradinei park hedgehog cactus Pediocactus peeblesianus Navajo pincushion cactus Pediocactus peeblesianus var. fickeiseniae Navajo pincushion cactus Pediocactus peeblesianus var. peeblesianus Navajo pincushion cactus Pediocactus sileri Siler's pincushion cactus Pediocactus simpsonii Simpson hedgehog cactus Pediocactus simpsonii var. simpsonii Simpson hedgehog cactus Echinocactus simpsonii Pediomelum Indian breadroot Pediomelum aromaticum aromatic Indian breadroot Pediomelum aromaticum var. barnebyi Pediomelum aromaticum var. tuhyi Psoralea aromatica Pediomelum castoreum beaver Indian breadroot Psoralea castorea Pediomelum megalanthum Intermountain Indian breadroot Pediomelum megalanthum var. epipsilum Intermountain Indian breadroot Pediomelum epipsilum Psoralea epipsila Pediomelum megalanthum var. retrorsum Intermountain Indian breadroot Psoralea mephitica var. retrorsa Pediomelum mephiticum skunktop Psoralea mephitica Pediomelum pentaphyllum small Indian breadroot Pediomelum trinervatum Psoralea pentaphylla Psoralea trinervata Peganum peganum Peganum harmala harmal peganum Pellaea cliffbrake Pellaea atropurpurea purple cliffbrake Pellaea glabella smooth cliffbrake Pellaea glabella ssp. simplex smooth cliffbrake Pellaea atropurpurea var. simplex Pellaea glabella var. simplex Pellaea occidentalis ssp. simplex Pellaea suksdorfiana Pellaea intermedia intermediate cliffbrake Pellaea lyngholmii Lyngholm's cliffbrake Pellaea ternifolia TransPecos cliffbrake Pellaea ternifolia ssp. arizonica Arizonia cliffbrake Pellaea truncata spiny cliffbrake Pellaea longimucronata Pellaea wrightiana Wright's cliffbrake Pellaea ternifolia var. wrightiana Peniocereus peniocereus Peniocereus greggii nightblooming cereus Peniocereus greggii var. greggii nightblooming cereus Cereus greggii Peniocereus greggii var. transmontanus nightblooming cereus Cereus greggii var. transmontanus Peniocereus striatus gearstem cactus Cereus diguetii Cereus striatus Neoevansia striata Wilcoxia diguetii Wilcoxia striata Pennellia mock thelypody Pennellia longifolia longleaf mock thelypody Streptanthus longifolius Thelypodium longifolium Pennellia micrantha mountain mock thelypody Streptanthus micranthus Thelypodium longifolium var. catalinense Thelypodium micranthum Pennisetum fountaingrass Pennisetum ciliare buffelgrass Pennisetum ciliare var. ciliare buffelgrass Cenchrus ciliaris Pennisetum glaucum pearl millet Chaetochloa glauca Chaetochloa lutescens Panicum americanum Panicum glaucum Pennisetum americanum Pennisetum typhoides Setaria glauca Setaria lutescens Pennisetum setaceum crimson fountaingrass Pennisetum ruppelii Phalaris setacea Penstemon beardtongue Penstemon albomarginatus whitemargin beardtongue Penstemon ambiguus gilia beardtongue Penstemon ambiguus var. laevissimus pink plains beardtongue Penstemon ambiguus ssp. laevissimus Penstemon angustifolius broadbeard beardtongue Penstemon angustifolius var. venosus broadbeard beardtongue Penstemon angustifolius ssp. venosus Penstemon venosus Penstemon barbatus beardlip penstemon Penstemon barbatus ssp. barbatus beardlip penstemon Penstemon barbatus var. puberulus Penstemon barbatus ssp. torreyi Torrey's penstemon Penstemon barbatus var. torreyi Penstemon torreyi Penstemon barbatus ssp. trichander beardlip penstemon Penstemon barbatus var. trichander Penstemon bicolor pinto beardtongue Penstemon bicolor ssp. roseus pinto beardtongue Penstemon breviculus shortstem beardtongue Penstemon jamesii ssp. breviculus Penstemon caespitosus mat penstemon Penstemon caespitosus var. desertipicti mat penstemon Penstemon caespitosus ssp. desertipicti Penstemon clutei Sunset Crater beardtongue Penstemon cobaea cobaea beardtongue Penstemon cobaea var. purpureus Penstemon cobaea ssp. purpureus Penstemon cobaea ssp. typicus Penstemon comarrhenus dusty beardtongue Penstemon xcrideri pro sp. [eatonii x pseudospectabilis] Penstemon dasyphyllus Cochise beardtongue Penstemon deaveri Mt. Graham beardtongue Penstemon virgatus ssp. arizonicus Penstemon discolor Cataiina beardtongue Penstemon distans Mt. Tumbull beardtongue Penstemon eatonii Eaton's penstemon Penstemon eatonii ssp. eatonii Eaton's penstemon Penstemon eatonii ssp. exsertus Eaton's penstemon Penstemon eatonii ssp. undosus Eaton's penstemon Penstemon eatonii var. undosus Penstemon fendleri Fendler's penstemon Penstemon laevis southwestern beardtongue Penstemon lentus handsome beardtongue Penstemon lentus var. lentus handsome beardtongue Penstemon linarioides toadflax penstemon Penstemon linarioides ssp. coloradoensis toadflax penstemon Penstemon coloradoensis Penstemon linarioides ssp. compactifolius toadflax beardtongue Penstemon linarioides ssp. linarioides toadflax beardtongue Penstemon linarioides ssp. typicus Penstemon linarioides ssp. maguirei Maguire's penstemon Penstemon linarioides ssp. sileri Siler's penstemon Penstemon linarioides var. sileri Penstemon linarioides var. viridis Penstemon xmirus pro sp. [eatonii x palmeri] Penstemon nudiflorus Flagstaff beardtongue Penstemon oliganthus Apache beardtongue Penstemon ophianthus coiled anther penstemon Penstemon jamesii ssp. ophianthus Penstemon pachyphyllus thickleaf beardtongue Penstemon pachyphyllus var. congestus thickleaf beardtongue Penstemon congestus Penstemon pachyphyllus ssp. congestus Penstemon palmeri Palmer's penstemon Penstemon palmeri var. eglandulosus scented beardtongue Penstemon palmeri ssp. eglandulosus Penstemon palmeri var. palmeri Palmer's penstemon Penstemon palmeri ssp. typicus Penstemon parryi Parry's beardtongue Penstemon petiolatus petiolate beardtongue Penstemon pinifolius pineneedle beardtongue Penstemon pseudoputus Kaibab Plateau beardtongue Penstemon virgatus ssp. pseudoputus Penstemon pseudospectabilis desert penstemon Penstemon pseudospectabilis ssp. connatifolius desert beardtongue Penstemon pseudospectabilis ssp. pseudospectabilis desert beardtongue Penstemon pseudospectabilis ssp. typicus Penstemon putus Black River beardtongue Penstemon virgatus ssp. putus Penstemon ramosus lanceleaf beardtongue Penstemon lanceolatus Penstemon pauciflorus Penstemon rostriflorus Bridge penstemon Penstemon bridgesii Penstemon bridgesii var. amplexicaulis Penstemon rydbergii Rydberg's penstemon Penstemon rydbergii var. aggregatus meadow beardtongue Penstemon aggregatus Penstemon rydbergii ssp. aggregatus Penstemon stenophyllus Sonoran beardtongue Penstemon strictiformis Mancos penstemon Penstemon strictus ssp. strictiformis Penstemon strictus Rocky Mountain penstemon Penstemon strictus ssp. angustus Penstemon subulatus hackberry beardtongue Penstemon superbus superb beardtongue Penstemon thompsoniae Thompson's beardtongue Penstemon thompsoniae ssp. thompsoniae Thompson's beardtongue Penstemon thompsoniae var. desperatus Penstemon thurberi Thurber's penstemon Penstemon thurberi var. anestius Penstemon utahensis Utah penstemon Penstemon virgatus upright blue beardtongue Penstemon watsonii Watson's penstemon Penstemon whippleanus Whipple's penstemon Pentagramma goldback fern Pentagramma triangularis goldback fern Pentagramma triangularis ssp. maxonii Maxon's goldback fern Pityrogramma triangularis var. maxonii Pentzia pentzia Pentzia incana African sheepbush Pentzia virgata Pericome pericome Pericome caudata mountain tail-leaf Pericome caudata var. glandulosa Perideridia yampah Perideridia gairdneri Gardner's yampah Perideridia gairdneri ssp. borealis common yampah Atenia montana Carum montanum Perideridia montana Perideridia parishii Parish's yampah Perideridia parishii ssp. parishii Parish's yampah Perityle rockdaisy Perityle ajoensis Ajo rockdaisy Perityle ambrosiifolia lace-leaved rockdaisy Perityle ciliata fringed rockdaisy Perityle cochisensis Cochise rockdaisy Laphamia cochisensis Perityle congesta Grand Canyon rockdaisy Laphamia congesta Perityle coronopifolia crowfoot rockdaisy Perityle emoryi Emory's rockdaisy Perityle emoryi var. nuda Perityle gilensis Gila rockdaisy Perityle gilensis var. gilensis Gila rockdaisy Laphamia gilensis Perityle gilensis var. salensis Salt River rockdaisy Laphamia gilensis ssp. longilobus Perityle gracilis three-lobed rockdaisy Laphamia fastigiata Laphamia gracilis Perityle fastigiata Perityle lemmonii Lemmon's rockdaisy Perityle microglossa shortray rockdaisy Perityle spilanthoides Perityle saxicola Roosevelt Dam rockdaisy Laphamia saxicola Perityle tenella Springdale rockdaisy Laphamia palmeri Laphamia palmeri var. tenella Petalonyx sandpaper plant Petalonyx linearis narrowleaf sandpaper plant Petalonyx nitidus shinyleaf sandpaper plant Petalonyx parryi Parry's sandpaper plant Petalonyx thurberi Thurber's sandpaper plant Petalonyx thurberi ssp. thurberi Thurber's sandpaper plant Peteria peteria Peteria scoparia rush peteria Peteria thompsoniae Thompson's peteria Peteria nevadensis Petradoria rockgoldenrod Petradoria pumila grassy rockgoldenrod Petradoria pumila ssp. graminea giant rockgoldenrod Petradoria pumila var. graminea Solidago graminea Petradoria pumila ssp. pumila grassy rockgoldenrod Solidago petradoria Petrophyton rockspirea Petrophyton caespitosum mat rockspirea Petrophyton caespitosum var. caespitosum mat rockspirea Eriogynia caespitosa Spiraea caespitosa Petrophyton caespitosum var. elatius mat rockspirea Peucephyllum pygmycedar Peucephyllum schottii Schott's pygmycedar Phacelia phacelia Phacelia affinis limestone phacelia Phacelia affinis var. patens Phacelia alba white phacelia Phacelia neomexicana var. alba Phacelia arizonica Arizona phacelia Phacelia popei var. arizonica Phacelia bombycina Mangas Spring phacelia Phacelia tenuipes Phacelia caerulea skyblue phacelia Phacelia coerulea [orthographic variant] Phacelia intermedia Phacelia cephalotes virgin phacelia Phacelia constancei Constance's phacelia Phacelia crenulata cleftleaf wildheliotrope Phacelia crenulata var. ambigua purplestem phacelia Phacelia ambigua Phacelia crenulata var. angustifolia cleftleaf phacelia Phacelia crenulata var. corrugata cleftleaf wildheiotrope Phacelia corrugata Phacelia crenulata var. crenulata cleftleaf wildheliotrope Phacelia crenulata var. funerea Phacelia crenulata var. vulgaris Phacelia intermedia Phacelia crenulata var. minutiflora cleftleaf wildheliotrope Phacelia ambigua var. minutiflora Phacelia minutiflora Phacelia cronquistiana Cronquist's phacelia Phacelia cryptantha hiddenflower phacelia Phacelia cryptantha var. derivata Phacelia curvipes Washoe phacelia Phacelia demissa Intermountain phacelia Phacelia demissa var. demissa Intermountain phacelia Phacelia demissa var. heterotricha Phacelia demissa var. typica Phacelia distans distant phacelia Phacelia cinerea Phacelia distans var. australis Phacelia egena Kaweah River phacelia Phacelia magellanica Phacelia filiformis narrow phacelia Phacelia fremontii Fremont's phacelia Phacelia glechomifolia pennyroyal leaf phacelia Phacelia heterophylla varileaf phacelia Phacelia heterophylla ssp. heterophylla varileaf phacelia Phacelia heterophylla var. typica Phacelia sericea var. biennis Phacelia howelliana harlequin phacelia Phacelia integrifolia gypsum phacelia Phacelia integrifolia var. integrifolia gypsum phacelia Phacelia integrifolia var. typica Phacelia ivesiana Ives' phacelia Phacelia ivesiana var. ivesiana Ives' phacelia Phacelia ivesiana var. typica Phacelia ivesiana var. pediculoides Ives' phacelia Phacelia pediculoides Phacelia laxiflora dozing phacelia Phacelia perityloides var. laxiflora Phacelia lemmonii Lemmon's phacelia Phacelia neglecta alkali phacelia Phacelia neomexicana New Mexico phacelia Phacelia neomexicana var. pseudoarizonica Phacelia palmeri Palmer's phacelia Phacelia palmeri var. foetida Phacelia parryi Parry's phacelia Phacelia parryi var. celata Phacelia pedicellata pedicellate phacelia Phacelia pulchella beautiful phacelia Phacelia pulchella var. gooddingii Goodding's phacelia Phacelia pulchella var. pulchella beautiful phacelia Phacelia pulchella var. typica Phacelia rafaelensis plateau phacelia Phacelia ramosissima branching phacelia Phacelia ramosissima var. latifolia branching phacelia Phacelia ramosissima var. suffrutescens Phacelia suffrutescens Phacelia rotundifolia roundleaf phacelia Phacelia rupestris rock phacelia Phacelia congesta var. rupestris Phacelia saxicola stonecrop phacelia Phacelia scopulina Debeque phacelia Phacelia scopulina var. submutica Debeque phacelia Phacelia lutea var. submutica Phacelia submutica Phacelia sericea silky phacelia Phacelia sericea ssp. ciliosa silky phacelia Phacelia ciliosa Phacelia sericea var. ciliosa Phacelia serrata saw phacelia Phacelia tanacetifolia lacy phacelia Phacelia vallis-mortae Death Valley phacelia Phacelia vallis-mortae var. vallis-mortae Death Valley phacelia Phacelia welshii Welsh's phacelia Phalaris canarygrass Phalaris angusta timothy canarygrass Phalaris aquatica bulbous canarygrass Phalaris stenoptera Phalaris tuberosa Phalaris tuberosa var. hirtiglumis Phalaris tuberosa var. stenoptera Phalaris arundinacea reed canarygrass Phalaroides arundinacea Phalaris arundinacea var. picta Phalaroides arundinacea var. picta Phalaris canariensis annual canarygrass Phalaris caroliniana Carolina canarygrass Phalaris minor littleseed canarygrass Phalaris paradoxa hood canarygrass Phalaris paradoxa var. praemorsa Phanerophlebia phanerophlebia Phanerophlebia auriculata eared veinfern Cyrtomium auriculatum Phaseolus bean Phaseolus acutifolius tepary bean Phaseolus acutifolius var. acutifolius tepary bean Phaseolus acutifolius var. latifolius tepary bean Phaseolus acutifolius var. tenuifolius tepary bean Phaseolus angustissimus slimleaf bean Phaseolus angustissimus var. latus Phaseolus filiformis slimjim bean Phaseolus wrightii Phaseolus grayanus Gray's bean Phaseolus maculatus spotted bean Phaseolus metcalfei Phaseolus parvulus Pinos Altos Mountain bean Phaseolus ritensis Santa Rita Mountain bean Phaseolus supinus supine bean Philadelphus mock orange Philadelphus argenteus silver mock orange Philadelphus microphyllus var. argenteus Philadelphus microphyllus ssp. argenteus Philadelphus argyrocalyx silvercup mock orange Philadelphus microphyllus ssp. argyrocalyx Philadelphus crinitus TransPecos mock orange Philadelphus maculatus spotted mock orange Philadelphus madrensis desert mountain mock orange Philadelphus microphyllus littleleaf mock orange Philadelphus microphyllus var. linearis Philadelphus microphyllus var. minutus Philadelphus microphyllus var. ovatus Philadelphus microphyllus ssp. stramineus Philadelphus microphyllus ssp. typicus Philadelphus stramineus Philadelphus occidentalis western mock orange Philadelphus occidentalis var. minutus western mock orange Philadelphus occidentalis var. occidentalis western mock orange Philadelphus microphyllus var. occidentalis Philadelphus microphyllus ssp. occidentalis Philadelphus palmeri Palmer's mock orange Philadelphus serpyllifolius thymeleaf mock orange Phleum timothy Phleum alpinum alpine timothy Phleum alpinum var. commutatum Phleum commutatum Phleum commutatum var. americanum Phleum pratense timothy Phleum nodosum Phleum pratense var. nodosum Phleum pratense ssp. nodosum Phlox phlox Phlox amabilis Arizona phlox Phlox austromontana mountain phlox Phlox austromontana ssp. austromontana mountain phlox Phlox austromontana var. lutescens Phlox austromontana ssp. vera Phlox austromontana ssp. densa dense mountain phlox Phlox austromontana ssp. prostrata prostrate mountain phlox Phlox austromontana var. prostrata Phlox cluteana Navajo Mountain phlox Phlox diffusa spreading phlox Phlox diffusa ssp. subcarinata spreading phlox Phlox cyanea Phlox gracilis slender phlox Phlox gracilis ssp. gracilis slender phlox Gilia gracilis Microsteris gracilis Phlox gracilis ssp. humilis slender phlox Gilia gracilis var. humilior Microsteris gracilis var. humilior Microsteris gracilis ssp. humilis Microsteris humilis Microsteris micrantha Phlox gracilis var. humilior Phlox griseola grayleaf phlox Phlox griseola ssp. griseola grayleaf phlox Phlox hoodii spiny phlox Phlox hoodii ssp. canescens carpet phlox Phlox canescens Phlox hoodii var. canescens Phlox hoodii ssp. hoodii spiny phlox Phlox hoodii ssp. genuina Phlox hoodii ssp. lanata carpet phlox Phlox lanata Phlox longifolia longleaf phlox Phlox longifolia ssp. brevifolia longleaf phlox Phlox grayi Phlox longifolia ssp. longifolia longleaf phlox Phlox grahamii Phlox longifolia ssp. cortezana Phlox longifolia ssp. calva Phlox longifolia ssp. humilis Phlox longifolia var. linearifolia Phlox longifolia var. peberula Phlox longifolia ssp. typica Phlox speciosa showy phlox Phlox speciosa ssp. woodhousei Woodhouse's phlox Phlox speciosa ssp. euspeciosa Phlox speciosa var. woodhousei Phlox woodhousei Phlox stansburyi cold-desert phlox Phlox stansburyi ssp. stansburyi cold-desert phlox Phlox longifolia var. stansburyi Phlox stansburyi var. brevifolia Phlox stansburyi ssp. eustansburyi Phlox tenuifolia Santa Catalina Mountain phlox Phlox triovulata threeseed phlox Phlox nana ssp. glabella Phlox viridis green phlox Phlox viridis ssp. compacta green phlox Phlox longifolia ssp. compacta Phlox viridis ssp. longipes green phlox Phlox longifolia ssp. longipes Phlox longifolia var. longipes Phlox longifolia var. puberula Phlox viscida sticky phlox Pholisma pholisma Pholisma arenarium desert christmas tree Pholisma depressum Pholisma paniculatum Pholisma sonorae sandfood Ammobroma sonorae Pholistoma fiestaflower Pholistoma auritum blue fiestaflower Pholistoma auritum var. arizonicum Arizona fiestaflower Phoradendron mistletoe Phoradendron californicum mesquite mistletoe Phoradendron californicum var. distans Phoradendron californicum var. leucocarpum Phoradendron capitellatum downy mistletoe Phoradendron bolleanum var. capitellatum Phoradendron coryae Cory's mistletoe Phoradendron havardianum Phoradendron villosum ssp. coryae Phoradendron densum dense mistletoe Phoradendron bolleanum ssp. densum Phoradendron bolleanum var. densum Phoradendron juniperinum juniper mistletoe Phoradendron juniperinum var. ligatum Phoradendron ligatum Phoradendron macrophyllum Colorado Desert mistletoe Phoradendron macrophyllum ssp. macrophyllum Colorado Desert mistletoe Phoradendron coloradense Phoradendron flavescens var. macrophyllum Phoradendron longispicum Phoradendron tomentosum ssp. macrophyllum Phoradendron tomentosum var. macrophyllum Phoradendron pauciflorum fir mistletoe Phoradendron bolleanum ssp. pauciflorum Phoradendron bolleanum var. pauciflorum Phragmites reed Phragmites australis common reed Phragmites australis var. berlandieri Phragmites communis Phragmites communis ssp. berlandieri Phragmites communis var. berlandieri Phragmites phragmites Phyla fogfruit Phyla cuneifolia wedgeleaf Lippia cuneifolia Phyla lanceolata lanceleaf fogfruit Lippia lanceolata Lippia lanceolata var. recognita Phyla lanceolata var. recognita Phyla nodiflora turkey tangle fogfruit Lippia canescens Lippia incisa Lippia nodiflora Lippia nodiflora var. canescens Lippia nodiflora var. reptans Lippia nodiflora var. rosea Lippia reptans Phyla incisa Phyla nodiflora var. antillana Phyla nodiflora var. canescens Phyla nodiflora var. incisa Phyla nodiflora var. longifolia Phyla nodiflora var. reptans Phyla nodiflora var. repens Phyla nodiflora var. rosea Phyla nodiflora var. texensis Phyllanthus leafflower Phyllanthus polygonoides smartweed leaf-flower Phyllodoce mountainheath Phyllodoce empetriformis pink mountainheath Physalis groundcherry Physalis acutifolia sharpleaf groundcherry Physalis wrightii Physalis angulata cutleaf groundcherry Physalis angulata var. lanceifolia Physalis angulata var. pendula Physalis lanceifolia Physalis pendula Physalis caudella southwestern groundcherry Physalis crassifolia yellow nightshade groundcherry Physalis crassifolia var. crassifolia yellow nightshade groundcherry Physalis crassifolia var. cardiophylla Physalis greenei Physalis crassifolia var. versicolor yellow nightshade groundcherry Physalis versicolor Physalis hederifolia ivyleaf groundcherry Physalis hederifolia var. fendleri Fendler's groundcherry Physalis fendleri Physalis fendleri var. cordifolia Physalis hederifolia var. cordifolia Physalis hederifolia var. hederifolia ivyleaf groundcherry Physalis hederifolia var. puberula Physalis heterophylla clammy groundcherry Physalis heterophylla var. heterophylla clammy groundcherry Physalis ambigua Physalis heterophylla var. ambigua Physalis heterophylla var. clavipes Physalis heterophylla var. nyctaginea Physalis heterophylla var. villosa Physalis nyctaginea Physalis sinuata Physalis hispida prairie groundcherry Physalis lanceolata Physalis longifolia var. hispida Physalis pumila ssp. hispida Physalis virginiana var. hispida Physalis latiphysa broadleaf groundcherry Physalis longifolia longleaf groundcherry Physalis longifolia var. longifolia longleaf groundcherry Physalis pumila var. sonorae Physalis rigida Physalis virginiana var. sonorae Physalis philadelphica Mexican groundcherry Physalis philadelphica var. immaculata Mexican groundcherry Physalis ixocarpa Physalis pubescens husk tomato Physalis pubescens var. integrifolia husk tomato Physalis pruinosa Physalis subulata Chihuahuan groundcherry Physalis subulata var. neomexicana New Mexican groundcherry Physalis foetens var. neomexicana Physalis neomexicana Physaria twinpod Physaria chambersii Chambers' twinpod Physaria chambersii var. sobolifera Physaria newberryi Newberry's twinpod Physaria newberryi var. newberryi Newberry's twinpod Physaria didymocarpa var. newberryi Physaria newberryi var. racemosa Newberry's twinpod Physocarpus ninebark Physocarpus monogynus mountain ninebark Phytolacca pokeweed Phytolacca americana American pokeweed Phytolacca americana var. americana American pokeweed Phytolacca decandra Phytolacca icosandra Phytolacca octandra red inkplant Phytolacca acinosa Picea spruce Picea engelmannii Engelmann spruce Picea glauca ssp. engelmannii Picea glauca var. engelmannii Picea pungens blue spruce Picradeniopsis bahia Picradeniopsis oppositifolia oppositeleaf bahia Bahia oppositifolia Picradeniopsis woodhousei Woodhouse's bahia Bahia woodhousei Picrothamnus bud sagebrush Picrothamnus desertorum bud sagebrush Artemisia spinescens Pilostyles stemsucker Pilostyles thurberi Thurber's stemsucker Pinaropappus rocklettuce Pinaropappus roseus white rocklettuce Pinaropappus roseus var. foliosus white rocklettuce Pinus pine Pinus aristata bristlecone pine Pinus arizonica Arizona pine Pinus arizonica var. arizonica Arizona pine Pinus ponderosa var. arizonica Pinus ponderosa ssp. arizonica Pinus arizonica var. stormiae Arizona pine Pinus discolor border pinyon Pinus cembroides var. bicolor Pinus culminicola var. discolor Pinus edulis twoneedle pinyon Pinus cembroides var. edulis Pinus engelmannii Apache pine Pinus apacheca Pinus latifolia Pinus flexilis limber pine Pinus leiophylla Chihuahuan pine Pinus leiophylla var. chihuahuana Chihuahuan pine Pinus chihuahuana Pinus monophylla singleleaf pinyon Pinus monophylla var. fallax singleleaf pinyon Pinus edulis var. fallax Pinus monophylla var. monophylla singleleaf pinyon Pinus ponderosa ponderosa pine Pinus ponderosa var. scopulorum ponderosa pine Pinus ponderosa ssp. scopulorum Pinus strobiformis southwestern white pine Pinus ayacahuite Pinus flexilis var. reflexa Pinus reflexa Piptatherum ricegrass Piptatherum micranthum littleseed ricegrass Oryzopsis micrantha Piptatherum miliaceum smilograss Agrostis miliacea Oryzopsis miliacea Piptochaetium speargrass Piptochaetium fimbriatum pinyon ricegrass Piptochaetium fimbriatum var. confine Stipa fimbriata Piptochaetium pringlei Pringle's speargrass Stipa pringlei Pisonia catchbirdtree Pisonia capitata Mexican devil's-claws Pistia pistia Pistia stratiotes water lettuce Plagiobothrys popcornflower Plagiobothrys arizonicus Arizona popcornflower Plagiobothrys collinus Cooper's popcornflower Plagiobothrys collinus var. fulvescens Cooper's popcornflower Echidiocarya californica ssp. fulvescens Plagiobothrys californicus var. fulvescens Plagiobothrys jonesii Mojave popcornflower Plagiobothrys pringlei Pringle's popcornflower Plagiobothrys scouleri Scouler's popcornflower Plagiobothrys scouleri var. hispidulus sleeping popcornflower Allocarya cognata Allocarya hispidula Allocarya scopulorum Plagiobothrys cognatus Plagiobothrys hispidulus Plagiobothrys nelsonii Plagiobothrys scopulorum Plagiobothrys scouleri var. penicillatus Plagiobothrys scouleri ssp. penicillatus Plagiobothrys tenellus Pacific popcornflower Plagiobothrys asper Plantago plantain Plantago argyraea saltmeadow plantain Plantago purshii var. argyraea Plantago australis Mexican plantain Plantago australis ssp. hirtella Mexican plantain Plantago hirtella Plantago hirtella var. galeottiana Plantago hirtella ssp. galeottiana Plantago hirtella var. mollior Plantago bigelovii coast plantain Plantago bigelovii ssp. californica coast plantain Plantago californica Plantago eriopoda redwool plantain Plantago shastensis Plantago heterophylla slender plantain Plantago lanceolata narrowleaf plantain Plantago altissima Plantago lanceolata var. sphaerostachya Plantago major common plantain Plantago asiatica Plantago halophila Plantago major var. asiatica Plantago major var. intermedia Plantago major ssp. intermedia Plantago major var. pachyphylla Plantago major var. pilgeri Plantago major var. scopulorum Plantago ovata desert Indianwheat Plantago brunnea Plantago fastigiata Plantago gooddingii Plantago insularis Plantago insularis var. fastigiata Plantago insularis var. scariosa Plantago minima Plantago patagonica woolly plantain Plantago patagonica var. breviscapa Plantago patagonica var. gnaphalioides Plantago patagonica var. oblonga Plantago patagonica var. spinulosa Plantago picta Plantago purshii Plantago purshii var. breviscapa Plantago purshii var. oblonga Plantago purshii var. picta Plantago purshii var. spinulosa Plantago spinulosa Plantago wyomingensis Plantago rhodosperma redseed plantain Plantago tweedyi Tweedy's plantain Plantago eriopoda var. tweedyi Plantago virginica Virginia plantain Plantago virginica var. viridescens Plantago wrightiana Wright's plantain Plantago hookeriana var. nuda Platanthera fringed orchid Platanthera hyperborea northern green orchid Platanthera hyperborea var. gracilis lax-flowered green orchid Habenaria sparsiflora var. laxiflora Platanthera gracilis Platanthera hyperborea var. hyperborea northern green orchid Habenaria hyperborea Limnorchis hyperborea Platanthera hyperborea var. minor Platanthera leucostachys Sierra bog orchid Habenaria dilatata var. leucostachys Habenaria leucostachys Limnorchis graminifolia Platanthera dilatata var. leucostachys Platanthera limosa Thurber's bog orchid Habenaria limosa Limnorchis thurberi Platanthera sparsiflora sparse-flowered bog orchid Platanthera sparsiflora var. ensifolia sparse-flowered bog orchid Limnorchis ensifolia Platanthera sparsiflora var. sparsiflora sparse-flowered bog orchid Habenaria sparsiflora Limnorchis sparsiflora Platanthera stricta slender bog orchid Habenaria saccata Habenaria stricta Limnorchis saccata Limnorchis stricta Platanthera dilatata var. gracilis Platanthera hyperborea var. purpurascens Platanthera saccata Platanthera zothecina alcove bog orchid Habenaria zothecina Limnorchis zothecina Platanus sycamore Platanus wrightii Arizona sycamore Platanus racemosa var. wrightii Platyschkuhria basindaisy Platyschkuhria integrifolia basindaisy Platyschkuhria integrifolia var. oblongifolia oblongleaf basindaisy Bahia nudicaulis var. oblongifolia Bahia oblongifolia Platyschkuhria oblongifolia Platystemon creamcups Platystemon californicus creamcups Platystemon arizonicus Platystemon californicus var. ciliatus Platystemon californicus var. crinitus Platystemon californicus var. horridulus Platystemon californicus var. nutans Platystemon californicus var. ornithopus Platystemon confinis Platystemon mohavensis Plectritis seablush Plectritis ciliosa longspur seablush Plectritis ciliosa ssp. ciliosa longspur seablush Plectritis californica Plectritis ciliosa ssp. insignis longspur seablush Plectritis californica var. rubens Plectritis ciliosa var. davyana Plectritis macroptera var. patelliformis Pleopeltis scaly polypody Pleopeltis riograndensis Rio Grande scaly polypody Polypodium thyssanolepis var. riograndense Pleopeltis thyssanolepis Arizona scaly polypody Polypodium thyssanolepis Pleuraphis galleta grass Pleuraphis jamesii James' galleta Hilaria jamesii Pleuraphis mutica tobosagrass Hilaria mutica Pleuraphis rigida big galleta Hilaria rigida Pleurocoronis pleurocoronis Pleurocoronis pluriseta bush arrowleaf Hofmeisteria pluriseta Pluchea camphorweed Pluchea odorata sweetscent Pluchea odorata var. odorata sweetscent Conyza odorata Pluchea purpurascens Pluchea sericea arrowweed Berthelotia sericea Polypappus sericeus Tessaria sericea Plumbago leadwort Plumbago scandens doctorbush Poa bluegrass Poa annua annual bluegrass Poa annua var. aquatica Poa annua var. reptans Poa bigelovii Bigelow's bluegrass Poa bulbosa bulbous bluegrass Poa compressa Canada bluegrass Poa fendleriana muttongrass Poa fendleriana ssp. albescens muttongrass Poa albescens Poa fendleriana ssp. fendleriana muttongrass Poa fendleriana ssp. longiligula muttongrass Poa fendleriana var. longiligula Poa longiligula Poa glauca glaucous bluegrass Poa glauca ssp. rupicola timberline bluegrass Poa glauca var. rupicola Poa rupicola Poa leptocoma marsh bluegrass Poa nemoralis wood bluegrass Poa nemoralis ssp. interior inland bluegrass Poa interior Poa nemoralis var. interior Poa occidentalis New Mexico bluegrass Poa palustris fowl bluegrass Poa crocata Poa eyerdamii Poa triflora Poa pratensis Kentucky bluegrass Poa pratensis ssp. pratensis Kentucky bluegrass Poa agassizensis Poa angustifolia Poa pratensis ssp. agassizensis Poa pratensis ssp. angustifolia Poa pratensis var. angustifolia Poa pratensis var. domestica Poa pratensis var. gelida Poa pratensis var. iantha Poa reflexa nodding bluegrass Poa leptocoma var. reflexa Poa secunda Sandberg bluegrass Poa ampla Poa brachyglossa Poa buckleyana Poa canbyi Poa confusa Poa englishii Poa gracillima Poa gracillima var. multnomae Poa incurva Poa juncifolia Poa juncifolia var. ampla Poa juncifolia ssp. porteri Poa laevigata Poa nevadensis Poa nevadensis var. juncifolia Poa orcuttiana Poa sandbergii Poa scabrella Poa secunda var. elongata Poa secunda var. incurva Poa secunda ssp. juncifolia Poa secunda var. stenophylla Poa stenantha var. sandbergii Polanisia clammyweed Polanisia dodecandra redwhisker clammyweed Polanisia dodecandra ssp. dodecandra redwhisker clammyweed Polanisia graveolens Polanisia dodecandra ssp. trachysperma sandyseed clammyweed Polanisia dodecandra var. trachysperma Polanisia trachysperma Polemonium Jacob's-ladder Polemonium foliosissimum towering Jacob's-ladder Polemonium foliosissimum var. flavum yellow Jacob's-ladder Polemonium filicinum Polemonium flavum Polemonium foliosissimum var. foliosissimum towering Jacob's-ladder Polemonium foliosissimum ssp. robustum Polemonium foliosissimum ssp. verum Polemonium pauciflorum fewflower Jacob's-ladder Polemonium pauciflorum ssp. hinckleyi Hinckley's polemonium Polemonium hinckleyi Polemonium pauciflorum ssp. pauciflorum fewflower Jacob's-ladder Polemonium pauciflorum ssp. typicum Polemonium pulcherrimum Jacob's-ladder Polemonium pulcherrimum ssp. delicatum Jacob's-ladder Polemonium delicatum Polemonium delicatum ssp. scopulinum Polemonium delicatum ssp. typicum Polemonium pulcherrimum var. delicatum Polemonium viscosum sticky polemonium Polemonium viscosum ssp. genuinum Polemonium viscosum ssp. lemmonii Poliomintha rosemary-mint Poliomintha incana frosted mint Hedeoma incana Polygala polygala Polygala acanthoclada desert polygala Polygala alba white milkwort Polygala alba var. suspecta Polygala barbeyana blue milkwort Polygala longa Polygala racemosa Polygala reducta Polygala glochidiata tropical milkwort Polygala hemipterocarpa winged milkwort Polygala intermontana Intermountain milkwort Polygala acanthoclada var. intricata Polygala lindheimeri shrubby milkwort Polygala lindheimeri var. parvifolia shrubby milkwort Polygala tweedyi Polygala macradenia glandleaf milkwort Polygala obscura velvetseed milkwort Polygala orthotricha Polygala piliophora Huachuca Mountain milkwort Polygala rusbyi Rusby's milkwort Polygala scoparioides broom milkwort Polygala subspinosa spiny milkwort Polygala tenuiloba slenderlobe milkwort Polygonatum Solomon's seal Polygonatum cobrense McKittrick's Solomon's seal Salomonia cobrensis Polygonum knotweed Polygonum amphibium water knotweed Polygonum amphibium var. emersum longroot smartweed Persicaria amphibia Persicaria amphibia var. emersa Persicaria coccinea Persicaria muehlenbergii Polygonum amphibium var. coccineum Polygonum coccineum Polygonum coccineum var. pratincola Polygonum coccineum var. terrestre Polygonum muehlenbergii Polygonum muehlenbergii var. terrestre Polygonum amphibium var. stipulaceum water smartweed Persicaria amphibia var. stipulacea Persicaria mesochora Persicaria nebraskensis Polygonum amphibium var. hartwrightii Polygonum amphibium ssp. laevimarginatum Polygonum coccineum var. rigidulum Polygonum fluitans Polygonum hartwrightii Polygonum inundatum Polygonum natans Polygonum arenastrum oval-leaf knotweed Polygonum aequale Polygonum aviculare var. arenastrum Polygonum montereyense Polygonum argyrocoleon silversheath knotweed Polygonum aviculare prostrate knotweed Polygonum aviculare var. vegetum Polygonum heterophyllum Polygonum monspeliense Polygonum bistortoides American bistort Bistorta bistortoides Persicaria bistortoides Polygonum bistortoides var. linearifolium Polygonum bistortoides var. oblongifolium Polygonum cephalophorum Polygonum glastifolium Polygonum vulcanicum Polygonum buxiforme box knotweed Polygonum aviculare var. littorale Polygonum littorale Polygonum convolvulus black bindweed Polygonum convolvulus var. convolvulus black bindweed Bilderdykia convolvulus Fallopia convolvulus Reynoutria convolvulus Tiniaria convolvulus Polygonum douglasii Douglas' knotweed Polygonum douglasii ssp. douglasii Douglas' knotweed Polygonum buxiforme var. montanum Polygonum douglasii var. latifolium Polygonum emaciatum Polygonum montanum Polygonum douglasii ssp. johnstonii Johnston's knotweed Polygonum douglasii var. johnstonii Polygonum sawatchense Polygonum triandrum Polygonum utahense Polygonum hydropiperoides swamp smartweed Persicaria hydropiperoides Persicaria hydropiperoides var. breviciliata Persicaria hydropiperoides var. euronotora Persicaria hydropiperoides var. opelousana Persicaria opelousana Persicaria paludicola Persicaria persicarioides Polygonum hydropiperoides var. adenocalyx Polygonum hydropiperoides var. asperifolium Polygonum hydropiperoides var. breviciliatum Polygonum hydropiperoides var. bushianum Polygonum hydropiperoides var. digitatum Polygonum hydropiperoides var. euronotorum Polygonum hydropiperoides var. opelousanum Polygonum hydropiperoides var. psilostachyum Polygonum hydropiperoides var. strigosum Polygonum opelousanum Polygonum opelousanum var. adenocalyx Polygonum persicarioides Polygonum lapathifolium curlytop knotweed Persicaria incarnata Persicaria lapathifolia Persicaria tomentosa Polygonum incarnatum Polygonum incanum Polygonum lapathifolium var. incanum Polygonum lapathifolium var. nodosum Polygonum lapathifolium var. ovatum Polygonum lapathifolium ssp. pallidum Polygonum lapathifolium var. prostratum Polygonum lapathifolium var. salicifolium Polygonum nodosum Polygonum oneillii Polygonum pensylvanicum ssp. oneillii Polygonum scabrum Polygonum tomentosum Polygonum minimum broadleaf knotweed Polygonum pensylvanicum Pennsylvania smartweed Persicaria bicornis Persicaria longistyla Persicaria mississippiensis Persicaria pensylvanica Persicaria pensylvanica var. dura Polygonum bicorne Polygonum longistylum Polygonum longistylum var. omissum Polygonum mexicanum Polygonum mississippiense Polygonum mississippiense var. interius Polygonum pensylvanicum var. durum Polygonum pensylvanicum var. eglandulosum Polygonum pensylvanicum var. genuinum Polygonum pensylvanicum var. laevigatum Polygonum pensylvanicum var. rosiflorum Polygonum persicaria spotted ladysthumb Persicaria maculata Persicaria persicaria Persicaria ruderalis Persicaria ruderalis var. vulgaris Persicaria vulgaris Polygonum dubium Polygonum fusiforme Polygonum minus Polygonum minus var. subcontinuum Polygonum persicaria var. angustifolium Polygonum persicaria var. ruderale Polygonum puritanorum Polygonum polygaloides milkwort knotweed Polygonum polygaloides ssp. confertiflorum fruitleaf knotweed Polygonum confertiflorum Polygonum imbricatum Polygonum kelloggii var. confertiflorum Polygonum watsonii Polygonum polygaloides ssp. kelloggii Kellogg's knotweed Polygonum kelloggii Polygonum unifolium Polygonum punctatum dotted smartweed Polygonum punctatum var. confertiflorum dotted smartweed Persicaria punctata var. leptostachya Polygonum punctatum var. leptostachyum Polygonum punctatum var. parvum Polygonum ramosissimum bushy knotweed Polygonum ramosissimum var. ramosissimum bushy knotweed Polygonum allocarpum Polygonum atlanticum Polygonum autumnale Polygonum exsertum Polygonum interius Polygonum triangulum Polypodium polypody Polypodium glycyrrhiza licorice fern Polypodium vulgare var. commune Polypodium vulgare ssp. occidentale Polypodium vulgare var. occidentale Polypodium hesperium western polypody Polypodium vulgare var. columbianum Polypodium vulgare ssp. columbianum Polypodium vulgare var. hesperium Polypogon rabbitsfoot grass Polypogon australis Chilean rabbitsfoot grass Polypogon elongatus streambank rabbitsfoot grass Polypogon interruptus ditch rabbitsfoot grass Polypogon lutosus Polypogon monspeliensis annual rabbitsfoot grass Alopecurus monspeliensis Polypogon viridis beardless rabbitsfoot grass Agrostis semiverticillata Agrostis verticillata Agrostis viridis Polypogon semiverticillatus Polystichum hollyfern Polystichum lonchitis northern hollyfern Polystichum scopulinum mountain hollyfern Polystichum mohrioides var. scopulinum Populus cottonwood Populus xacuminata pro sp. [angustifolia x deltoides] lanceleaf cottonwood Populus acuminata var. rehderi Populus angustifolia narrowleaf cottonwood Populus balsamifera var. angustifolia Populus canadensis var. angustifolia Populus fortissima Populus salicifolia Populus xsennii Populus tweedyi Populus deltoides eastern cottonwood Populus deltoides ssp. wislizeni Rio Grande cottonwood Populus deltoides var. wislizeni Populus fremontii var. wislizeni Populus wislizeni Populus fremontii Fremont cottonwood Populus fremontii ssp. fremontii Fremont cottonwood Populus arizonica Populus arizonica var. jonesii Populus canadensis var. fremontii Populus fremontii var. arizonica Populus fremontii var. macdougalii Populus fremontii var. macrodisca Populus fremontii var. pubescens Populus fremontii var. toumeyi Populus fremontii var. thornberi Populus macdougalii Populus fremontii ssp. mesetae Fremont cottonwood Populus fremontii var. mesetae Populus mexicana Populus xhinckleyana pro sp. [angustifolia x fremontii] Populus nigra Lombardy poplar Populus dilatata Populus italica Populus nigra var. italica Populus xparryi [balsamifera x fremontii] Populus tremuloides quaking aspen Populus aurea Populus cercidiphylla Populus xpolygonifolia Populus tremuloides var. aurea Populus tremuloides var. cercidiphylla Populus tremuloides var. intermedia Populus tremuloides var. magnifica Populus tremuloides var. rhomboidea Populus tremula ssp. tremuloides Populus tremuloides var. vancouveriana Populus vancouveriana Porophyllum poreleaf Porophyllum gracile slender poreleaf Porophyllum caesium Porophyllum junciforme Porophyllum nodosum Porophyllum putidum Porophyllum vaseyi Porophyllum ruderale yerba porosa Porophyllum ruderale ssp. macrocephalum yerba porosa Kleinia glandulosa Porophyllum latifolium Porophyllum macrocephalum Porophyllum ruderale var. macrocephalum Porterella porterella Porterella carnosula fleshy porterella Portulaca purslane Portulaca halimoides silkcotton purslane Portulaca parvula Portulaca oleracea little hogweed Portulaca neglecta Portulaca oleracea ssp. granulatostellulata Portulaca oleracea ssp. impolita Portulaca oleracea ssp. nicaraguensis Portulaca oleracea ssp. nitida Portulaca oleracea ssp. papillatostellulata Portulaca oleracea ssp. stellata Portulaca retusa Portulaca suffrutescens shrubby purslane Portulaca umbraticola wingpod purslane Portulaca umbraticola ssp. umbraticola wingpod purslane Portulaca lanceolata Portulaca umbraticola ssp. lanceolata Potamogeton pondweed Potamogeton crispus curly pondweed Potamogeton diversifolius waterthread pondweed Potamogeton capillaceus Potamogeton capillaceus var. atripes Potamogeton diversifolius var. multidenticulatus Potamogeton foliosus leafy pondweed Potamogeton foliosus ssp. foliosus leafy pondweed Potamogeton curtissii Potamogeton foliosus var. genuinus Potamogeton foliosus var. macellus Potamogeton gramineus variableleaf pondweed Potamogeton gramineus var. graminifolius Potamogeton gramineus var. maximus Potamogeton gramineus var. myriophyllus Potamogeton gramineus var. typicus Potamogeton illinoensis Illinois pondweed Potamogeton angustifolius Potamogeton heterophyllus Potamogeton lucens Potamogeton natans floating pondweed Potamogeton nodosus longleaf pondweed Potamogeton americanus Potamogeton fluitans Potamogeton pusillus small pondweed Potamogeton pusillus ssp. pusillus small pondweed Potamogeton lateralis Potamogeton panormitanus Potamogeton panormitanus var. major Potamogeton panormitanus var. minor Potamogeton pusillus var. minor Potamogeton pusillus ssp. tenuissimus small pondweed Potamogeton berchtoldii Potamogeton berchtoldii var. acuminatus Potamogeton berchtoldii var. colpophilus Potamogeton berchtoldii var. lacunatus Potamogeton berchtoldii var. mucronatus Potamogeton berchtoldii var. polyphyllus Potamogeton berchtoldii var. tenuissimus Potamogeton pusillus var. mucronatus Potamogeton pusillus var. tenuissimus Potamogeton richardsonii Richardson's pondweed Potamogeton perfoliatus var. richardsonii Potamogeton perfoliatus ssp. richardsonii Potamogeton xspathuliformis pro sp. [gramineus x illinoensis] Potamogeton varians Potentilla cinquefoil Potentilla albiflora whiteflower cinquefoil Potentilla arguta tall cinquefoil Potentilla arguta ssp. convallaria cream cinquefoil Potentilla arguta var. convallaria Potentilla convallaria Potentilla biennis biennial cinquefoil Potentilla concinna elegant cinquefoil Potentilla concinna var. proxima elegant cinquefoil Potentilla beanii Potentilla proxima Potentilla crinita bearded cinquefoil Potentilla crinita var. crinita bearded cinquefoil Potentilla vallicola Potentilla crinita var. lemmonii Lemmon's cinquefoil Ivesia lemmonii Potentilla lemmonii Potentilla diversifolia varileaf cinquefoil Potentilla diversifolia var. diversifolia varileaf cinquefoil Potentilla diversifolia ssp. glaucophylla Potentilla diversifolia var. glaucophylla Potentilla glaucophylla Potentilla glandulosa sticky cinquefoil Potentilla glandulosa ssp. arizonica Arizona cinquefoil Potentilla glandulosa ssp. glabrata sticky cinquefoil Potentilla glandulosa var. intermedia Potentilla gracilis slender cinquefoil Potentilla hippiana woolly cinquefoil Potentilla hippiana var. hippiana woolly cinquefoil Potentilla hippiana var. diffusa Potentilla leneophylla Potentilla leucophylla Potentilla propinqua Potentilla nivea snow cinquefoil Potentilla norvegica Norwegian cinquefoil Potentilla norvegica ssp. monspeliensis Norwegian cinquefoil Potentilla monspeliensis Potentilla norvegica ssp. hirsuta Potentilla norvegica var. hirsuta Potentilla norvegica var. labradorica Potentilla pectinisecta combleaf cinquefoil Potentilla gracilis var. elmeri Potentilla pensylvanica Pennsylvania cinquefoil Potentilla pensylvanica var. pensylvanica Pennsylvania cinquefoil Potentilla atrovirens Potentilla bipinnatifida var. glabrata Potentilla glabella Potentilla pensylvanica var. atrovirens Potentilla pensylvanica var. glabrata Potentilla pensylvanica var. ovium Potentilla pensylvanica var. strigosa Potentilla platyloba Potentilla pseudosericea Potentilla strigosa Potentilla plattensis Platte River cinquefoil Potentilla pulcherrima beautiful cinquefoil Potentilla camporum Potentilla gracilis var. pulcherrima Potentilla rivalis brook cinquefoil Potentilla rivalis var. millegrana brook cinquefoil Potentilla leucocarpa Potentilla millegrana Potentilla rivalis var. rivalis brook cinquefoil Potentilla rubida Chihuahuan cinquefoil Potentilla subviscosa Navajo cinquefoil Potentilla subviscosa var. ramulosa Navajo cinquefoil Potentilla subviscosa var. subviscosa Navajo cinquefoil Potentilla thurberi scarlet cinquefoil Potentilla thurberi var. atrorubens scarlet cinquefoil Potentilla thurberi var. sanguinea scarlet cinquefoil Potentilla thurberi var. thurberi scarlet cinquefoil Potentilla wheeleri Kern cinquefoil Potentilla viscidula Prenanthella prenanthella Prenanthella exigua brightwhite Lygodesmia exigua Primula primrose Primula parryi Parry's primrose Primula rusbyi Rusby's primrose Primula ellisiae Primula specuicola cavedwelling primrose Primula hunnewellii Proboscidea unicorn-plant Proboscidea althaeifolia desert unicorn-plant Martynia althaeifolia Martynia arenaria Proboscidea arenaria Proboscidea parviflora doubleclaw Martynia parviflora Proboscidea crassibracteata Prosopis mesquite Prosopis farcta Syrian mesquite Prosopis stephaniana Prosopis glandulosa honey mesquite Prosopis glandulosa var. torreyana western honey mesquite Prosopis juliflora var. torreyana Prosopis odorata Prosopis pubescens screwbean mesquite Prosopis velutina velvet mesquite Neltuma velutina Prosopis articulata Prosopis chilensis var. velutina Prosopis juliflora Prosopis juliflora var. articulata Prosopis juliflora var. velutina Prunella selfheal Prunella vulgaris common selfheal Prunella vulgaris ssp. lanceolata lance selfheal Prunella vulgaris var. elongata Prunella vulgaris var. lanceolata Prunus plum Prunus americana American plum Prunus emarginata bitter cherry Prunus emarginata var. emarginata bitter cherry Prunus emarginata var. crenulata Prunus fasciculata desert almond Prunus fasciculata var. fasciculata desert almond Prunus persica peach Amygdalus persica Persica vulgaris Prunus serotina black cherry Prunus serotina var. rufula black cherry Prunus virens var. rufula Prunus serotina var. virens black cherry Prunus virens Prunus virginiana chokecherry Prunus virginiana var. demissa western chokecherry Prunus demissa Prunus virginiana ssp. demissa Prunus virginiana var. melanocarpa black chokecherry Padus melanocarpa Padus virginiana ssp. melanocarpa Prunus melanocarpa Prunus virginiana ssp. melanocarpa Psacalium Indianbush Psacalium decompositum desert Indianbush Cacalia decomposita Odontotrichum decompositum Psathyrostachys wildrye Psathyrostachys juncea Russian wildrye Elymus junceus xLeymostachys korovinii Psathyrotes turtleback Psathyrotes annua annual psathyrotes Bulbostylis annua Psathyrotes pilifera hairybeast turtleback Psathyrotes ramosissima velvet turtleback Tetradymia ramosissima xPseudelymus foxtail wheatgrass xPseudelymus saxicola [Elymus elymoides x Pseudoroegneria spicata] foxtail wheatgrass Agropyron saxicola xAgrositanion saxicola Elymus saxicola Pseudocymopterus false springparsley Pseudocymopterus montanus alpine false springparsley Cymopterus lemmonii Pseudocymopterus tidestromii Thaspium montanum Pseudognaphalium cudweed Pseudognaphalium arizonicum Arizona cudweed Gnaphalium arizonicum Pseudognaphalium canescens Wright's cudweed Pseudognaphalium canescens ssp. canescens Wright's cudweed Gnaphalium canescens Gnaphalium wrightii Pseudognaphalium leucocephalum white cudweed Gnaphalium leucocephalum Pseudognaphalium luteoalbum Jersey cudweed Gnaphalium luteoalbum Pseudognaphalium macounii Macoun's cudweed Gnaphalium decurrens Gnaphalium macounii Pseudognaphalium viscosum Pseudognaphalium pringlei Pringle's cudweed Gnaphalium pringlei Pseudognaphalium stramineum cottonbatting plant Gnaphalium chilense Gnaphalium chilense var. confertifolium Gnaphalium stramineum Pseudoroegneria wheatgrass Pseudoroegneria spicata bluebunch wheatgrass Pseudoroegneria spicata ssp. spicata bluebunch wheatgrass Agropyron spicatum Agropyron spicatum var. pubescens Agropyron vaseyi Elymus spicatus Elytrigia spicata Roegneria spicata Pseudorontium pseudorontium Pseudorontium cyathiferum dog's-mouth Antirrhinum cyathiferum Pseudostellaria pseudostellaria Pseudostellaria jamesiana tuber starwort Alsine glutinosa Alsine jamesiana Alsine jamesii Arenaria jamesiana Stellaria jamesiana Pseudotsuga Douglas-fir Pseudotsuga menziesii Douglas-fir Pseudotsuga mucronata Pseudotsuga menziesii var. glauca Rocky Mountain Douglas-fir Pseudotsuga flahaultii Pseudotsuga menziesii var. flahaultii Pseudotsuga taxifolia var. glauca Psilactis tansyaster Psilactis asteroides New Mexico tansyaster Aster amplifolius Aster boltoniae Aster canescens var. latifolius Dieteria asteroides Machaeranthera amplifolia Machaeranthera asteroides Machaeranthera asteroides var. glandulosa Machaeranthera asteroides var. lagunensis Machaeranthera boltoniae Machaeranthera canescens var. latifolia Machaeranthera hansonii Machaeranthera lagunensis Machaeranthera pruinosa Machaeranthera simplex Machaeranthera verna Psilactis leptos Psilactis gentryi Mexican tansyaster Machaeranthera mexicana Psilostrophe paperflower Psilostrophe cooperi whitestem paperflower Riddellia cooperi Psilostrophe sparsiflora greenstem paperflower Riddellia tagetina var. sparsiflora Psilostrophe tagetina woolly paperflower Psilostrophe tagetina var. tagetina woolly paperflower Psilostrophe tagetina var. grandiflora Psilostrophe tagetina var. lanata Riddellia tagetina Psilotum whisk fern Psilotum nudum whisk fern Psoralidium scurfpea Psoralidium junceum rush lemonweed Psoralea juncea Psoralidium lanceolatum lemon scurfpea Psoralea lanceolata Psoralea lanceolata var. purshii Psoralea lanceolata var. stenophylla Psoralea lanceolata var. stenostachys Psoralea lanceolata ssp. scabra Psoralidium lanceolatum var. stenophyllum Psoralidium lanceolatum var. stenostachys Psoralea scabra Psoralea stenostachys Psoralidium stenophyllum Psoralidium tenuiflorum slimflower scurfpea Psoralidium batesii Psoralea floribunda Psoralea obtusifolia Psoralea tenuiflora Psoralea tenuiflora var. bigelovii Psoralea tenuiflora var. floribunda Psorothamnus dalea Psorothamnus arborescens Mojave indigobush Psorothamnus arborescens var. minutifolius Johnson's indigobush Dalea fremontii var. minutifolia Psorothamnus arborescens var. pubescens Mojave indigobush Dalea amoena Dalea amoena var. pubescens Dalea fremontii var. pubescens Psorothamnus emoryi dyebush Dalea emoryi Psorothamnus fremontii Fremont's dalea Psorothamnus fremontii var. attenuatus Fremont's dalea Psorothamnus fremontii var. fremontii Fremont's dalea Dalea fremontii Dalea fremontii var. johnsonii Psorothamnus schottii Schott's dalea Dalea schottii Dalea schottii var. puberula Psorothamnus scoparius broom dalea Dalea scoparia Psorothamnus spinosus smoketree Dalea spinosa Psorothamnus thompsoniae Thompson's dalea Psorothamnus thompsoniae var. whitingii Whiting's dalea Dalea whitingii Ptelea hoptree Ptelea trifoliata common hoptree Ptelea trifoliata ssp. angustifolia common hoptree Ptelea trifoliata ssp. angustifolia var. angustifolia common hoptree Ptelea angustifolia Ptelea trifoliata ssp. pallida pallid hoptree Ptelea trifoliata ssp. pallida var. cognata pallid hoptree Ptelea angustifolia var. cognata Ptelea trifoliata ssp. pallida var. lutescens pallid hoptree Ptelea trifoliata ssp. pallida var. pallida pallid hoptree Ptelea pallida Ptelea trifoliata ssp. polyadenia pallid hoptree Ptelea monticola Pteridium brackenfern Pteridium aquilinum western brackenfern Pteridium aquilinum var. pubescens hairy brackenfern Pteridium aquilinum ssp. lanuginosum Pteridium aquilinum var. lanuginosum Pterospora pinedrops Pterospora andromedea woodland pinedrops Pterostegia pterostegia Pterostegia drymarioides woodland pterostegia Pteryxia wavewing Pteryxia davidsonii Davidson's wavewing Aletes davidsonii Pteryxia petraea rockloving wavewing Aletes petraea Cymopterus petraeus Cymopterus terebinthinus var. petraeus Puccinellia alkaligrass Puccinellia distans weeping alkaligrass Puccinellia distans ssp. distans weeping alkaligrass Poa distans Puccinellia distans var. tenuis Puccinellia retroflexa Puccinellia suksdorfii Puccinellia fasciculata saltmarsh alkaligrass Glyceria borreri Puccinellia borreri Puccinellia nuttalliana Nuttall's alkaligrass Puccinellia airoides Puccinellia cusickii Puccinellia parishii bog alkaligrass Purshia bitterbrush Purshia glandulosa desert bitterbrush Purshia tridentata var. glandulosa Purshia mexicana Mexican cliffrose Cowania mexicana Cowania mexicana var. dubia Purshia pinkavae Pinkava's cliffrose Purshia stansburiana Stansbury cliffrose Cowania alba Cowania mexicana var. stansburiana Cowania stansburiana Purshia mexicana var. stansburiana Purshia xsubintegra [pinkavae x stansburiana] Cowania subintegra Purshia tridentata antelope bitterbrush Pyrola wintergreen Pyrola chlorantha greenflowered wintergreen Pyrola chlorantha var. convoluta Pyrola chlorantha var. paucifolia Pyrola chlorantha var. revoluta Pyrola convoluta Pyrola oxypetala Pyrola virens Pyrola virens var. convoluta Pyrola virens var. saximontana Pyrola elliptica waxflower shinleaf Pyrola compacta Pyrola minor snowline wintergreen Braxilia minor Erxlebenia minor Pyrola minor var. parviflora Pyrola picta whiteveined wintergreen Pyrola aphylla Pyrola aphylla var. leptosepala Pyrola aphylla var. paucifolia Pyrola blanda Pyrola conardiana Pyrola dentata Pyrola dentata var. apophylla Pyrola dentata var. integra Pyrola pallida Pyrola paradoxa Pyrola picta ssp. dentata Pyrola picta var. dentata Pyrola picta ssp. integra Pyrola picta ssp. pallida Pyrola septentrionalis Pyrola sparsifolia Pyrrhopappus desert-chicory Pyrrhopappus pauciflorus smallflower desert-chicory Pyrrhopappus geiseri Pyrrhopappus multicaulis Pyrrhopappus multicaulis var. geiseri Pyrrhopappus rothrockii Sitilias multicaulis Pyrrocoma goldenweed Pyrrocoma crocea curlyhead goldenweed Pyrrocoma crocea var. genuflexa curlyhead goldenweed Haplopappus croceus var. genuflexus Pyrrocoma genuflexa Quercus oak Quercus ajoensis Ajo Mountain scrub oak Quercus turbinella var. ajoensis Quercus turbinella ssp. ajoensis Quercus arizonica Arizona white oak Quercus chrysolepis canyon live oak Quercus chrysolepis var. chrysolepis canyon live oak Quercus wilcoxii Quercus dunnii Palmer oak Quercus chrysolepis var. palmeri Quercus palmeri Quercus emoryi Emory oak Quercus gambelii Gambel oak Quercus gambelii var. gambelii Gambel oak Quercus eastwoodiae Quercus gunnisonii Quercus leptophylla Quercus nitescens Quercus novomexicana Quercus submollis Quercus utahensis Quercus vreelandii Quercus grisea gray oak Quercus hypoleucoides silverleaf oak Quercus oblongifolia Mexican blue oak Quercus xorganensis [arizonica x grisea] Quercus xpauciloba pro sp. [gambelii x turbinella] Quercus xandrewsii Quercus fendleri Quercus undulata Quercus venustula Quercus pungens pungent oak Quercus rugosa netleaf oak Quercus diversicolor Quercus reticulata Quercus toumeyi Toumey oak Quercus turbinella Sonoran scrub oak Quercus dumosa var. turbinella Quercus viminea Quincula quincula Quincula lobata Chinese lantern Physalis lobata Physalis lobata var. albiflora Rafinesquia California chicory Rafinesquia californica California plumseed Rafinesquia neomexicana New Mexico plumseed Ranunculus buttercup Ranunculus andersonii Anderson's buttercup Ranunculus andersonii var. tenellus Anderson's buttercup Ranunculus andersonii var. juniperinus Ranunculus juniperinus Ranunculus arizonicus Arizona buttercup Ranunculus arizonicus var. typicus Ranunculus cardiophyllus heartleaf buttercup Ranunculus cardiophyllus var. subsagittatus Ranunculus cardiophyllus var. typicus Ranunculus cymbalaria alkali buttercup Cyrtorhyncha cymbalaria ssp. alpina Halerpestes cymbalaria Halerpestes cymbalaria ssp. saximontana Ranunculus cymbalaria var. alpinus Ranunculus cymbalaria var. saximontanus Ranunculus cymbalaria ssp. saximontanus Ranunculus cymbalaria var. typicus Ranunculus eschscholtzii Eschscholtz's buttercup Ranunculus eschscholtzii var. eschscholtzii Eschscholtz's buttercup Ranunculus eschscholtzii var. typicus Ranunculus nivalis var. eschscholtzii Ranunculus eximius tundra buttercup Ranunculus eschscholtzii var. eximius Ranunculus flammula greater creeping spearwort Ranunculus flammula var. flammula greater creeping spearwort Ranunculus filiformis var. ovalis Ranunculus flammula var. genuinus Ranunculus flammula var. ovalis Ranunculus flammula var. samolifolius Ranunculus reptans var. ovalis Ranunculus glaberrimus sagebrush buttercup Ranunculus glaberrimus var. ellipticus elliptical buttercup Ranunculus ellipticus Ranunculus glaberrimus var. buddii Ranunculus hebecarpus delicate buttercup Ranunculus hydrocharoides frogbit buttercup Ranunculus hydrocharoides var. hydrocharoides frogbit buttercup Ranunculus hydrocharoides var. typicus Ranunculus hydrocharoides var. stolonifer frogbit buttercup Ranunculus stolonifer Ranunculus inamoenus graceful buttercup Ranunculus inamoenus var. alpeophilus graceful buttercup Ranunculus alpeophilus Ranunculus inamoenus var. inamoenus graceful buttercup Ranunculus affinis var. micropetalus Ranunculus inamoenus var. typicus Ranunculus inamoenus var. subaffinis graceful buttercup Ranunculus arizonicus var. subaffinis Ranunculus inamoenus ssp. subaffinis Ranunculus longirostris longbeak buttercup Batrachium circinatum ssp. subrigidum Batrachium longirostre Ranunculus amphibius Ranunculus aquatilis var. diffusus Ranunculus aquatilis var. longirostris Ranunculus aquatilis var. subrigidus Ranunculus circinatus Ranunculus circinatus var. subrigidus Ranunculus subrigidus Ranunculus usneoides Ranunculus macounii Macoun's buttercup Ranunculus macounii var. oreganus Ranunculus macranthus large buttercup Ranunculus fascicularis var. cuneiformis Ranunculus macranthus var. typicus Ranunculus oreogenes Oregon buttercup Ranunculus pedatifidus surefoot buttercup Ranunculus pedatifidus var. affinis northern buttercup Ranunculus affinis Ranunculus pedatifidus ssp. affinis Ranunculus pedatifidus var. leiocarpus Ranunculus pensylvanicus Pennsylvania buttercup Ranunculus petiolaris Latin American buttercup Ranunculus petiolaris var. arsenei Arsene's buttercup Ranunculus fasciculatus Ranunculus macranthus var. arsenei Ranunculus sceleratus cursed buttercup Ranunculus sceleratus var. multifidus cursed buttercup Ranunculus sceleratus ssp. multifidus Ranunculus trichophyllus threadleaf crowfoot Ranunculus trichophyllus var. trichophyllus threadleaf crowfoot Batrachium flaccidum Batrachium porteri Batrachium trichophyllum Ranunculus aquatilis var. capillaceus Ranunculus aquatilis var. calvescens Ranunculus aquatilis var. diffusus Ranunculus aquatilis var. harrisii Ranunculus aquatilis var. lalondei Ranunculus aquatilis var. porteri Ranunculus aquatilis var. trichophyllus Ranunculus flaccidus Ranunculus trichophyllus var. calvescens Ranunculus trichophyllus var. typicus Ranunculus uncinatus woodland buttercup Ranunculus uncinatus var. uncinatus woodland buttercup Ranunculus bongardii var. tenellus Ranunculus uncinatus var. typicus Raphanus radish Raphanus raphanistrum wild radish Raphanus sativus cultivated radish Raphanus raphanistrum var. sativus Ratibida prairie coneflower Ratibida columnifera upright prairie coneflower Lepachys columnifera Ratibida columnaris Ratibida columnaris var. pulcherrima Rudbeckia columnaris Rudbeckia columnifera Ratibida tagetes green prairie coneflower Rudbeckia globosa Rudbeckia tagetes Redfieldia blowout grass Redfieldia flexuosa blowout grass Reverchonia reverchonia Reverchonia arenaria sand reverchonia Rhamnus buckthorn Rhamnus crocea redberry buckthorn Rhamnus crocea ssp. crocea redberry buckthorn Rhamnus crocea ssp. pilosa hollyleaf buckthorn Rhamnus pilosa Rhamnus ilicifolia hollyleaf redberry Rhamnus crocea ssp. ilicifolia Rhamnus crocea var. ilicifolia Rhamnus serrata sawleaf buckthorn Rhamnus fasciculata Rhamnus smithii ssp. fasciculata Rhinanthus yellowrattle Rhinanthus minor little yellowrattle Rhinanthus minor ssp. minor little yellowrattle Rhinanthus borealis ssp. kyrolliae Rhinanthus crista-galli Rhinanthus crista-galli var. fallax Rhinanthus kyrolliae Rhinanthus rigidus Rhinanthus stenophyllus Rhodiola stonecrop Rhodiola rhodantha redpod stonecrop Clementsia rhodantha Sedum rhodanthum Rhus sumac Rhus glabra smooth sumac Rhus borealis Rhus calophylla Rhus glabra var. laciniata Rhus glabra var. occidentalis Rhus kearneyi Kearney's sumac Rhus microphylla littleleaf sumac Rhus ovata sugar sumac Rhus ovata var. traskiae Rhus trilobata skunkbush sumac Rhus trilobata var. anisophylla skunkbush sumac Schmaltzia anisophylla Schmaltzia trilobata var. anisophylla Rhus trilobata var. pilosissima pubescent squawbush Rhus aromatica var. mollis Rhus aromatica var. pilosissima Rhus aromatica ssp. pilosissima Rhus trilobata var. malacophylla Rhus trilobata var. quinata skunkbush sumac Rhus trilobata var. racemulosa skunkbush sumac Schmaltzia racemulosa Rhus trilobata var. simplicifolia skunkbush sumac Rhus aromatica var. simplicifolia Rhus trilobata var. trilobata skunkbush sumac Rhus aromatica var. flabelliformis Rhus aromatica ssp. flabelliformis Rhus aromatica ssp. trilobata Rhus aromatica var. trilobata Schmaltzia trilobata Rhus virens evergreen sumac Rhus virens var. choriophylla evergreen sumac Rhus choriophylla Rhus virens ssp. choriophylla Rhynchosia snoutbean Rhynchosia edulis Chihuahuan snoutbean Rhynchosia pinetorum Rhynchosia rariflora Rhynchosia precatoria rosary snoutbean Rhynchosia senna Texas snoutbean Rhynchosia senna var. texana Texas snoutbean Rhynchosia senna var. angustifolia Rhynchosia texana Rhynchosida rhynchosida Rhynchosida physocalyx buffpetal Sida physocalyx Ribes currant Ribes aureum golden currant Ribes aureum var. aureum golden currant Chrysobotrya aurea Ribes cereum wax currant Ribes cereum var. cereum wax currant Ribes reniforme Ribes viscidulum Ribes cereum var. pedicellare whisky currant Ribes cereum var. inebrians Ribes inebrians Ribes inerme whitestem gooseberry Ribes inerme var. inerme whitestem gooseberry Grossularia inermis Grossularia inermis var. pubescens Ribes divaricatum var. inerme Ribes inerme var. subarmatum Ribes valicola Ribes leptanthum trumpet gooseberry Ribes montigenum gooseberry currant Limnobotrya montigena Ribes lacustre var. molle Ribes lentum Ribes nubigenum Ribes pinetorum orange gooseberry Ribes quercetorum rock gooseberry Grossularia quercetora Ribes congdonii Ribes velutinum desert gooseberry Ribes velutinum var. velutinum desert gooseberry Grossularia velutina Ribes velutinum var. glanduliferum Ribes viscosissimum sticky currant Ribes viscosissimum var. hallii Ribes wolfii Wolf's currant Ribes mogollonicum Ricinus ricinus Ricinus communis castorbean Rivina rivina Rivina humilis rougeplant Robinia locust Robinia neomexicana New Mexico locust Robinia neomexicana var. neomexicana New Mexico locust Robinia luxurians Robinia neomexicana var. luxurians Robinia neomexicana var. subvelutina Robinia neomexicana var. rusbyi Rusby's locust Robinia breviloba Robinia rusbyi Roldana groundsel Roldana hartwegii Hartweg's groundsel Roldana carlomasonii Senecio carlomasonii Senecio hartwegii Senecio seemanii Rorippa yellowcress Rorippa curvipes bluntleaf yellowcress Rorippa curvipes var. curvipes bluntleaf yellowcress Rorippa curvipes var. truncata bluntleaf yellowcress Radicula sinuata var. truncata Rorippa curvipes var. integra Rorippa obtusa var. integra Rorippa truncata Rorippa microtitis Chihuahuan yellowcress Sisymbrium microtites Rorippa nasturtium-aquaticum watercress Nasturtium nasturtium-aquaticum Nasturtium officinale Nasturtium officinale var. siifolium Sisymbrium nasturtium-aquaticum Rorippa palustris bog yellowcress Rorippa palustris ssp. occidentalis western bog yellowcress Rorippa islandica var. occidentalis Rorippa palustris var. clavata Rorippa palustris var. occidentalis Rorippa sinuata spreading yellowcress Nasturtium sinuatum Radicula sinuata Rorippa sphaerocarpa roundfruit yellowcress Nasturtium sphaerocarpum Radicula sphaerocarpa Rorippa sylvestris creeping yellowcress Radicula sylvestris Rosa rose Rosa manca Mancos rose Rosa stellata desert rose Rosa stellata ssp. abyssa desert rose Rosa stellata var. abyssa Rosa stellata ssp. stellata desert rose Rosa woodsii Woods' rose Rosa woodsii var. woodsii Woods' rose Rosa adenosepala Rosa fendleri Rosa hypoleuca Rosa macounii Rosa neomexicana Rosa standleyi Rosa terrens Rosa woodsii var. adenosepala Rosa woodsii var. fendleri Rosa woodsii var. hypoleuca Rosa woodsii var. macounii Rostraria hairgrass Rostraria cristata Mediterranean hairgrass Festuca cristata Koeleria gerardii Koeleria phleoides Lophochloa cristata Rotala rotala Rotala ramosior lowland rotala Rotala catholica Rotala dentifera Rotala ramosior var. interior Rotala ramosior var. typica Rubus blackberry Rubus arizonensis Arizona dewberry Rubus discolor Himalayan blackberry Rubus procerus Rubus idaeus American red raspberry Rubus idaeus ssp. strigosus grayleaf red raspberry Rubus carolinianus Rubus idaeus var. aculeatissimus Rubus idaeus var. canadensis Rubus idaeus var. gracilipes Rubus idaeus var. melanolasius Rubus idaeus var. melanotrachys Rubus idaeus ssp. melanolasius Rubus idaeus ssp. sachalinensis Rubus idaeus var. strigosus Rubus melanolasius Rubus neglectus Rubus strigosus Rubus strigosus var. acalyphaceus Rubus strigosus var. arizonicus Rubus strigosus var. canadensis Rubus leucodermis whitebark raspberry Rubus leucodermis var. leucodermis whitebark raspberry Rubus occidentalis var. leucodermis Rubus neomexicanus New Mexico raspberry Oreobatus deliciosus ssp. neomexicanus Rubus exrubicundus Rubus parviflorus thimbleberry Rubus parviflorus var. parviflorus thimbleberry Rubacer parviflorus Rubus parviflorus var. bifarius Rubus parviflorus var. grandiflorus Rubus parviflorus var. heteradenius Rubus parviflorus var. hypomalacus Rubus parviflorus var. parvifolius Rudbeckia coneflower Rudbeckia laciniata cutleaf coneflower Rudbeckia laciniata var. ampla cutleaf coneflower Rudbeckia ampla Rudbeckia laciniata ssp. ampla Rudbeckia laciniata var. laciniata cutleaf coneflower Rudbeckia laciniata var. hortensis Ruellia wild petunia Ruellia nudiflora violet wild petunia Ruellia nudiflora var. nudiflora violet wild petunia Dipteracanthus nudiflorus Ruellia nudiflora var. glabrata Ruellia nudiflora var. hispidula Ruellia tuberosa Rumex dock Rumex acetosella common sheep sorrel Acetosella acetosella Acetosella tenuifolia Acetosella vulgaris Rumex acetosella ssp. angiocarpus Rumex acetosella var. pyrenaeus Rumex acetosella var. tenuifolius Rumex angiocarpus Rumex tenuifolius Rumex altissimus pale dock Rumex brittanicus Rumex ellipticus Rumex aquaticus western dock Rumex aquaticus var. fenestratus western dock Rumex aquaticus ssp. fenestratus Rumex aquaticus ssp. occidentalis Rumex fenestratus Rumex occidentalis Rumex occidentalis var. fenestratus Rumex occidentalis var. labradoricus Rumex occidentalis var. procerus Rumex conglomeratus clustered dock Rumex crispus curly dock Rumex crispus ssp. crispus curly dock Rumex densiflorus denseflowered dock Rumex praecox Rumex pycnanthus Rumex dentatus toothed dock Rumex dentatus ssp. klotzschianus Rumex hymenosepalus canaigre dock Rumex hymenosepalus var. euhymenosepalus Rumex hymenosepalus var. salinus Rumex maritimus golden dock Rumex fueginus Rumex maritimus var. athrix Rumex maritimus ssp. fueginus Rumex maritimus var. fueginus Rumex maritimus var. persicarioides Rumex persicarioides Rumex nematopodus Arizona dock Rumex obtusifolius bitter dock Acetosa oblongifolia Rumex obtusifolius ssp. agrestis Rumex obtusifolius ssp. sylvestris Rumex obtusifolius var. sylvestris Rumex orthoneurus Chiricahua Mountain dock Rumex salicifolius willow dock Rumex salicifolius var. denticulatus toothed willow dock Rumex californicus Rumex hesperis Rumex mexicanus var. strictus Rumex salicifolius var. montigenitus Rumex utahensis Rumex salicifolius var. mexicanus Mexican dock Rumex mexicanus Rumex mexicanus var. angustifolius Rumex mexicanus var. subarcticus Rumex quadrangulivalvis Rumex salicifolius ssp. triangulivalvis Rumex salicifolius var. triangulivalvis Rumex subarcticus Rumex triangulivalvis Rumex triangulivalvis var. oreolapathum Rumex violascens violet dock Ruppia widgeonweed Ruppia cirrhosa spiral ditchgrass Ruppia cirrhosa ssp. occidentalis Ruppia maritima var. occidentalis Ruppia maritima var. spiralis Ruppia occidentalis Ruppia spiralis Saccharum sugarcane Saccharum ravennae ravennagrass Erianthus ravennae Erianthus ravennae var. purpurascens Sageretia mock buckthorn Sageretia wrightii Wright's mock buckthorn Sagina pearlwort Sagina decumbens trailing pearlwort Sagina decumbens ssp. decumbens trailing pearlwort Sagina decumbens var. smithii Sagina decumbens ssp. occidentalis western pearlwort Sagina occidentalis Sagina saginoides arctic pearlwort Sagina linnaei Sagina micrantha Sagina saginoides var. hesperia Spergella saginoides Sagittaria arrowhead Sagittaria calycina hooded arrowhead Sagittaria calycina var. calycina hooded arrowhead Lophotocarpus californicus Lophotocarpus calycinus Lophotocarpus depauperatus Sagittaria montevidensis ssp. calycina Sagittaria cuneata arumleaf arrowhead Sagittaria arifolia Sagittaria graminea grassy arrowhead Sagittaria graminea var. graminea grassy arrowhead Sagittaria cycloptera Sagittaria eatonii Sagittaria latifolia broadleaf arrowhead Sagittaria chinensis Sagittaria engelmanniana ssp. longirostra Sagittaria esculenta Sagittaria latifolia var. obtusa Sagittaria latifolia var. pubescens Sagittaria longirostra Sagittaria obtusa Sagittaria ornithorhyncha Sagittaria planipes Sagittaria pubescens Sagittaria variabilis var. obtusa Sagittaria viscosa Sagittaria longiloba longbarb arrowhead Sagittaria greggii Sairocarpus snapdragon Sairocarpus kingii least snapdragon Antirrhinum kingii Sairocarpus nuttallianus violet snapdragon Antirrhinum nuttallianum Sairocarpus watsonii Watson's snapdragon Antirrhinum kingii var. watsonii Salazaria bladdersage Salazaria mexicana Mexican bladdersage Salix willow Salix alba white willow Salix alba var. caerulea Salix alba ssp. caerulea Salix alba var. calva Salix alba var. vitellina Salix alba ssp. vitellina Salix vitellina Salix amygdaloides peachleaf willow Salix amygdaloides var. wrightii Salix nigra var. amygdaloides Salix nigra var. wrightii Salix wrightii Salix arizonica Arizona willow Salix bebbiana Bebb willow Salix bebbiana var. capreifolia Salix bebbiana var. depilis Salix bebbiana var. luxurians Salix bebbiana var. perrostrata Salix bebbiana var. projecta Salix depressa ssp. rostrata Salix livida var. occidentalis Salix livida var. rostrata Salix perrostrata Salix rostrata Salix rostrata var. capreifolia Salix rostrata var. luxurians Salix rostrata var. perrostrata Salix rostrata var. projecta Salix starkeana ssp. bebbiana Salix vagans var. occidentalis Salix vagans var. rostrata Salix bonplandiana Bonpland willow Salix bonplandiana var. toumeyi Salix toumeyi Salix boothii Booth's willow Salix curtiflora Salix myrtillifolia Salix myrtillifolia var. curtiflora Salix novae-angliae Salix pseudocordata Salix pseudomyrsinites Salix pseudocordata var. aequalis Salix pseudomyrsinites var. aequalis Salix exigua narrowleaf willow Salix argophylla Salix exigua var. angustissima Salix exigua var. columbiana Salix exigua var. hindsiana Salix exigua var. luteosericea Salix exigua var. nevadensis Salix exigua var. parishiana Salix exigua var. stenophylla Salix exigua var. virens Salix fluviatilis var. argophylla Salix hindsiana Salix hindsiana var. leucodendroides Salix hindsiana var. parishiana Salix hindsiana var. tenuifolia Salix interior var. angustissima Salix interior var. luteosericea Salix linearifolia Salix longifolia var. argophylla Salix longifolia var. exigua Salix longifolia var. opaca Salix luteosericea Salix malacophylla Salix macrostachya var. leucodendroides Salix nevadensis Salix parishiana Salix sessilifolia var. hindsiana Salix sessilifolia var. leucodendroides Salix stenophylla Salix thurberi Salix geyeriana Geyer's willow Salix geyeriana ssp. argentea Salix geyeriana var. argentea Salix geyeriana var. meleina Salix macrocarpa Salix macrocarpa var. argentea Salix meleina Salix gooddingii Goodding's willow Salix gooddingii var. variabilis Salix gooddingii var. vallicola Salix nigra var. vallicola Salix vallicola Salix irrorata dewystem willow Salix laevigata red willow Salix bonplandiana var. laevigata Salix congesta Salix laevigata var. angustifolia Salix laevigata var. araquipa Salix laevigata var. congesta Salix lasiolepis arroyo willow Salix lasiolepis var. lasiolepis arroyo willow Salix bakeri von Salix boiseana Salix lasiolepis var. bakeri von Salix lasiolepis var. bracelinae Salix lasiolepis var. fallax Salix lasiolepis var. nivaria Salix lasiolepis var. sandbergii Salix lutea var. nivaria Salix sandbergii Salix suksdorfii Salix tracyi Salix ligulifolia strapleaf willow Salix cordata var. ligulifolia Salix eriocephala var. ligulifolia Salix lutea var. ligulifolia Salix rigida ssp. ligulifolia Salix lucida shining willow Salix lucida ssp. lasiandra Pacific willow Salix arguta Salix arguta var. erythrocoma Salix arguta var. lasiandra Salix lancifolia Salix lasiandra Salix lasiandra var. abramsii Salix lasiandra var. lyallii Salix lasiandra var. lancifolia Salix lasiandra var. macrophylla Salix lasiandra var. recomponens Salix lucida var. macrophylla Salix lyallii Salix speciosa nec Salix lutea yellow willow Salix cordata var. denveriana Salix cordata var. desolata Salix cordata var. lutea Salix cordata var. platyphylla Salix cordata var. watsonii Salix eriocephala var. famelica Salix eriocephala var. watsonii Salix flava Salix lutea var. desolata Salix lutea var. famelica Salix lutea var. platyphylla Salix lutea var. watsonii Salix ormsbyensis von Salix rigida var. watsonii Salix watsonii Salix monticola park willow Salix amelanchieroides Salix barclayi var. cochetopiana Salix barclayi var. neomexicana Salix barclayi var. padophylla Salix barclayi var. resurrectionis Salix barclayi var. uncompahgre Salix barclayi var. veritomonticola Salix cordata var. crux-aureae Salix cordata var. monticola Salix dissymetrica Salix monticola var. neomexicana Salix padifolia Salix padophylla Salix pseudomonticola var. padophylla Salix sawatchicola Salix planifolia diamondleaf willow Salix chlorophylla Salix chlorophylla var. monica Salix chlorophylla var. nelsonii Salix chlorophylla var. pychnocarpa Salix monica Salix nelsonii Salix pennata Salix phylicifolia var. monica Salix phylicifolia var. pennata Salix phylicifolia ssp. planifolia Salix planifolia var. monica Salix planifolia var. nelsonii Salix planifolia var. pennata Salix pychnocarpa Salix xrubens pro sp. [alba x fragilis] hybrid crack willow Salix scouleriana Scouler's willow Salix brachystachys Salix brachystachys var. scouleriana Salix capreoides Salix flavescens Salix flavescens var. capreoides Salix flavescens var. scouleriana Salix nuttallii Salix nuttallii var. capreoides Salix scouleriana var. brachystachys Salix scouleriana var. coetanea Salix scouleriana var. crassijulis Salix scouleriana var. flavescens Salix scouleriana var. poikila Salix scouleriana var. thompsonii Salix stagnalis Salix xsepulcralis [alba x babylonica] weeping willow Salix babylonica Salix salomonii Salix xsepulcralis var. chrysocoma Salix taxifolia yewleaf willow Salix taxifolia var. lejocarpa Salix taxifolia var. limitanea Salix taxifolia var. seriocarpa Salpichroa salpichroa Salpichroa origanifolia lily of the valley vine Perizoma rhomboidea Salpichroa rhomboidea Salsola Russian thistle Salsola collina slender Russian thistle Salsola paulsenii barbwire Russian thistle Salsola tragus prickly Russian thistle Salsola australis Salsola iberica Salsola kali ssp. ruthenica Salsola kali ssp. tragus Salsola kali ssp. tenuifolia Salsola pestifer Salsola ruthenica Salvia sage Salvia aethiopis Mediterranean sage Salvia amissa Santa Catalina Mountain sage Salvia arizonica desert indigo sage Salvia columbariae chia Salvia columbariae var. columbariae chia Salvia davidsonii Davidson's sage Salvia dorrii purple sage Salvia dorrii ssp. dorrii purple sage Salvia dorrii ssp. dorrii var. dorrii purple sage Salvia carnosa var. argentea Salvia carnosa ssp. argentea Salvia carnosa var. gracilior Salvia carnosa var. gilmanii Salvia carnosa ssp. gilmanii Salvia dorrii ssp. argentea Salvia dorrii ssp. gilmanii Salvia dorrii ssp. dorrii var. pilosa purple sage Salvia carnosa ssp. pilosa Salvia dorrii ssp. mearnsii purple sage Audibertia mearnsii Salvia carnosa ssp. mearnsii Salvia henryi crimson sage Salvia lemmonii Lemmon's sage Salvia microphylla var. wislizeni Salvia microphylla baby sage Salvia grahamii Salvia mohavensis Mojave sage Salvia pachyphylla blue sage Salvia parryi Parry's sage Salvia pinguifolia rock sage Salvia ballotiflora var. pinguifolia Salvia reflexa lanceleaf sage Salvia lancifolia Salvia subincisa sawtooth sage Salvia tiliifolia lindenleaf sage Sambucus elderberry Sambucus nigra European black elderberry Sambucus nigra ssp. canadensis common elderberry Sambucus canadensis Sambucus canadensis var. laciniata Sambucus canadensis var. submollis Sambucus cerulea var. mexicana Sambucus mexicana Sambucus orbiculata Sambucus simpsonii Sambucus nigra ssp. cerulea blue elderberry Sambucus cerulea Sambucus cerulea var. neomexicana Sambucus cerulea var. velutina Sambucus glauca Sambucus mexicana ssp. cerulea Sambucus mexicana var. cerulea Sambucus neomexicana Sambucus neomexicana var. vestita Sambucus velutina Sambucus racemosa red elderberry Sambucus racemosa var. melanocarpa black elderberry Sambucus melanocarpa Sambucus racemosa var. racemosa red elderberry Sambucus callicarpa Sambucus microbotrys Sambucus pubens Sambucus pubens var. arborescens Sambucus racemosa var. arborescens Sambucus racemosa var. leucocarpa Sambucus racemosa var. microbotrys Sambucus racemosa ssp. pubens Sambucus racemosa var. pubens Samolus brookweed Samolus vagans Chiricahua Mountain brookweed Samolus valerandi seaside brookweed Samolus valerandi ssp. parviflorus seaside brookweed Samolus floribundus Samolus parviflorus Sanguisorba burnet Sanguisorba annua prairie burnet Poteridium annuum Sanguisorba minor small burnet Sanguisorba minor ssp. muricata small burnet Poterium polygamum Poterium sanguisorba Sanvitalia creeping zinnia Sanvitalia abertii Albert's creeping zinnia Sapindus soapberry Sapindus saponaria wingleaf soapberry Sapindus saponaria var. drummondii western soapberry Sapindus drummondii Saponaria soapwort Saponaria officinalis bouncingbet Lychnis saponaria Sarcobatus greasewood Sarcobatus vermiculatus greasewood Sarcobatus baileyi Sarcobatus vermiculatus var. baileyi Sarcocornia swampfire Sarcocornia utahensis Utah swampfire Sarcocornia pacifica var. utahensis Salicornia utahensis Saxifraga saxifrage Saxifraga caespitosa tufted alpine saxifrage Saxifraga cespitosa [orthographic variant] Saxifraga caespitosa ssp. caespitosa tufted alpine saxifrage Muscaria caespitosa Muscaria cespitosa [orthographic variant] Saxifraga caespitosa var. emarginata Saxifraga caespitosa ssp. eucaespitosa Saxifraga caespitosa var. lemmonii Saxifraga cespitosa ssp. cespitosa [orthographic variant] Saxifraga cespitosa ssp. eucaespitosa [orthographic variant] Saxifraga cespitosa var. lemmonii [orthographic variant] Saxifraga eriophora redfuzz saxifrage Saxifraga flagellaris whiplash saxifrage Saxifraga flagellaris ssp. crandallii Crandall's saxifrage Hirculus platysepalus ssp. crandallii Saxifraga crandallii Saxifraga flagellaris var. crandallii Saxifraga odontoloma brook saxifrage Micranthes odontoloma Saxifraga aestivalis Saxifraga arguta Saxifraga punctata ssp. arguta Saxifraga punctata var. arguta Saxifraga rhomboidea diamondleaf saxifrage Micranthes franciscana Micranthes rhomboidea Saxifraga austrina Saxifraga greenei Saxifraga integrifolia var. rhomboidea Saxifraga rhomboidea var. austrina Saxifraga rhomboidea var. franciscana Saxifraga rivularis weak saxifrage Saxifraga debilis Saxifraga hyperborea ssp. debilis Saxifraga rivularis var. debilis Saxifraga rivularis var. flexuosa Saxifraga rivularis ssp. flexuosa Scandix scandix Scandix pecten-veneris shepherdsneedle Schedonnardus tumblegrass Schedonnardus paniculatus tumblegrass Schismus Mediterranean grass Schismus arabicus Arabian schismus Schismus barbatus common Mediterranean grass Festuca barbata Schistophragma schistophragma Schistophragma intermedia harlequin spiralseed Schizachyrium little bluestem Schizachyrium cirratum Texas bluestem Andropogon cirratus Schizachyrium sanguineum crimson bluestem Schizachyrium sanguineum var. hirtiflorum crimson bluestem Andropogon domingensis Andropogon hirtiflorus Andropogon hirtiflorus var. brevipedicellatus Andropogon hirtiflorus var. feensis Andropogon hirtiflorus var. oligostachyus Andropogon oligostachyus Schizachyrium domingense Schizachyrium feense Schizachyrium hirtiflorum Schizachyrium sanguineum var. brevipedicellatum Schizachyrium sanguineum var. oligostachyum Schizachyrium scoparium little bluestem Schizachyrium scoparium var. scoparium little bluestem Andropogon praematurus Andropogon scoparius Andropogon scoparius var. ducis Andropogon scoparius var. frequens Andropogon scoparius var. neomexicanus Andropogon scoparius var. polycladus Andropogon scoparius var. septentrionalis Schizachyrium praematurum Schizachyrium scoparium var. frequens Schizachyrium scoparium var. neomexicanum Schizachyrium scoparium ssp. neomexicanum Schizachyrium scoparium var. polycladum Schkuhria false threadleaf Schkuhria anthemoidea Wright's false threadleaf Schkuhria anthemoidea var. wrightii Wright's false threadleaf Schkuhria wislizeni var. wrightii Schkuhria multiflora manyflower false threadleaf Bahia neomexicana Schkuhria pinnata pinnate false threadleaf Schkuhria pinnata var. wislizeni Wislizenus' false threadleaf Schkuhria wislizeni Schkuhria wislizeni var. frustrata Schoenocrambe plainsmustard Schoenocrambe linearifolia slimleaf plainsmustard Hesperidanthus linearifolius Sisymbrium linearifolium Thelypodiopsis linearifolia Schoenoplectus bulrush Schoenoplectus acutus hardstem bulrush Schoenoplectus acutus var. occidentalis tule Scirpus acutus var. occidentalis Scirpus occidentalis Scirpus rubiginosus Schoenoplectus rubiginosus Schoenoplectus americanus chairmaker's bulrush Scirpus americanus Scirpus chilensis Scirpus conglomeratus Scirpus olneyi Scirpus pungens var. longisetus Schoenoplectus californicus California bulrush Scirpus californicus Scirpus californicus var. tereticulmis Schoenoplectus fluviatilis river bulrush Bolboschoenus fluviatilis Bolboschoenus maritimus ssp. fluviatilis Scirpus fluviatilis Schoenoplectus maritimus cosmopolitan bulrush Bolboschoenus maritimus Bolboschoenus maritimus ssp. paludosus Bolboschoenus paludosus Scirpus fernaldii Scirpus maritimus Scirpus maritimus var. fernaldii Scirpus maritimus var. paludosus Scirpus pacificus Scirpus paludosus Scirpus paludosus var. atlanticus Schoenoplectus pungens common threesquare Schoenoplectus pungens var. longispicatus common threesquare Scirpus americanus var. longispicatus Scirpus pungens var. longispicatus Schoenoplectus tabernaemontani softstem bulrush Schoenoplectus lacustris ssp. creber Scirpus lacustris ssp. creber Scirpus lacustris ssp. glaucus Scirpus lacustris ssp. tabernaemontani Schoenoplectus lacustris ssp. tabernaemontani Schoenoplectus lacustris ssp. validus Scirpus lacustris ssp. validus Scirpus tabernaemontani Scirpus validus Schoenoplectus validus Scirpus validus var. creber Schoenoplectus validus ssp. creber Schoenoplectus validus ssp. luxurians Scirpus bulrush Scirpus atrovirens green bulrush Scirpus microcarpus panicled bulrush Scirpus microcarpus var. longispicatus Scirpus microcarpus var. rubrotinctus Scirpus rubrotinctus Scirpus pallidus cloaked bulrush Scirpus atrovirens var. pallidus Scirpus pendulus rufous bulrush Scirpus lineatus Sclerocactus fishhook cactus Sclerocactus erectocentrus redspine fishhook cactus Echinomastus acunensis Echinomastus erectocentrus Echinocactus erectocentrus Echinomastus erectocentrus var. acunensis Neolloydia erectocentra Neolloydia erectocentra var. acunensis Sclerocactus intertextus white fishhook cactus Sclerocactus intertextus var. intertextus white fishhook cactus Echinomastus intertextus Echinocactus intertextus Neolloydia intertexta Sclerocactus johnsonii Johnson's fishhook cactus Echinocactus johnsonii Echinomastus johnsonii Echinocactus johnsonii var. lutescens Neolloydia johnsonii Neolloydia johnsonii var. lutescens Sclerocactus papyracanthus paperspine fishhook cactus Echinocactus papyracanthus Pediocactus papyracanthus Toumeya papyracantha Sclerocactus parviflorus smallflower fishhook cactus Sclerocactus parviflorus ssp. intermedius intermediate fishhook cactus Echinocactus whipplei var. intermedius Sclerocactus intermedius Sclerocactus parviflorus var. intermedius Sclerocactus whipplei var. intermedius Sclerocactus parviflorus ssp. parviflorus smallflower fishhook cactus Sclerocactus spinosior desert valley fishhook cactus Echinocactus whipplei var. spinosior Sclerocactus pubispinus var. sileri Sclerocactus pubispinus var. spinosior Sclerocactus sileri Sclerocactus whipplei var. spinosior Sclerocactus whipplei Whipple's fishhook cactus Echinocactus whipplei Pediocactus whipplei Sclerocactus parviflorus var. ?blessingiae Sclerocactus whipplei var. roseus Scleropogon burrograss Scleropogon brevifolius burrograss Scleropogon longisetus Scrophularia figwort Scrophularia parviflora pineland figwort Scrophularia davidsonii Scrophularia glabrata Scutellaria skullcap Scutellaria drummondii Drummond's skullcap Scutellaria drummondii var. edwardsiana Drummond's skullcap Scutellaria galericulata marsh skullcap Scutellaria epilobiifolia Scutellaria galericulata var. epilobiifolia Scutellaria galericulata var. pubescens Scutellaria galericulata ssp. pubescens Scutellaria lateriflora blue skullcap Scutellaria potosina Mexican skullcap Scutellaria potosina ssp. platyphylla Mexican skullcap Scutellaria potosina ssp. platyphylla var. platyphylla Mexican skullcap Scutellaria potosina ssp. potosina Mexican skullcap Scutellaria potosina ssp. potosina var. grahmiana Mexican skullcap Scutellaria potosina ssp. potosina var. tessellata Mexican skullcap Scutellaria potosina ssp. parviflora Scutellaria tessellata Sebastiania Sebastian-bush Sebastiania bilocularis arrow poision plant Sapium biloculare Secale rye Secale cereale cereal rye Secale ?montanum Triticum cereale Sedum stonecrop Sedum cockerellii Cockerell's stonecrop Cockerellia cockerellii Sedum griffithsii Sedum wootonii Sedum lanceolatum spearleaf stonecrop Sedum lanceolatum ssp. lanceolatum spearleaf stonecrop Amerosedum lanceolatum Sedum stelliforme Huachuca Mountain stonecrop Selaginella spikemoss Selaginella arizonica Arizona spikemoss Selaginella densa lesser spikemoss Selaginella densa var. densa lesser spikemoss Selaginella engelmannii Selaginella densa var. scopulorum Rocky Mountain spikemoss Selaginella engelmannii var. scopulorum Selaginella scopulorum Selaginella eremophila desert spikemoss Selaginella leucobryoides Mojave spikemoss Selaginella mutica bluntleaf spikemoss Selaginella mutica var. limitanea bluntleaf spikemoss Selaginella mutica var. texana Selaginella mutica var. mutica bluntleaf spikemoss Selaginella xneomexicana pro sp. [mutica x rupincola] Selaginella rupincola rockloving spikemoss Selaginella underwoodii Underwood's spikemoss Selaginella underwoodii var. dolichotricha Selaginella watsonii Watson's spikemoss Selinocarpus moonpod Selinocarpus nevadensis desert moonpod Selinocarpus diffusus ssp. nevadensis Senecio ragwort Senecio actinella Flagstaff ragwort Packera actinella Senecio actinella var. mogollonicus Senecio arizonicus Arizona ragwort Senecio bigelovii nodding ragwort Senecio bigelovii var. bigelovii nodding ragwort Ligularia bigelovii Senecio bigelovii var. hallii Hall's ragwort Ligularia bigelovii var. hallii Senecio eremophilus desert ragwort Senecio eremophilus var. kingii King's ragwort Senecio ambrosioides Senecio eremophilus ssp. kingii Senecio kingii Senecio eremophilus var. macdougalii MacDougal's ragwort Senecio eremophilus ssp. macdougalii Senecio macdougalii Senecio flaccidus threadleaf ragwort Senecio flaccidus var. flaccidus threadleaf ragwort Senecio douglasii var. jamesii Senecio douglasii var. longilobus Senecio douglasii ssp. longilobus Senecio filifolius Senecio longilobus Senecio flaccidus var. monoensis Mono ragwort Senecio douglasii var. monoensis Senecio monoensis Senecio lemmonii Lemmon's ragwort Senecio mohavensis Mojave ragwort Senecio multidentatus Huachuca Mountain ragwort Senecio multidentatus var. huachucanus Huachuca Mountain ragwort Senecio huachucanus Senecio parryi mountain ragwort Senecio riddellii Riddell's ragwort Senecio spartioides var. fremontii Senecio spartioides var. parksii Senecio spartioides broomlike ragwort Senecio spartioides var. multicapitatus broomlike ragwort Senecio multicapitatus Senecio spartioides var. spartioides broomlike ragwort Senecio spartioides var. granularis Senecio toiyabensis Senecio vulgaris old-man-in-the-Spring Senecio wootonii Wooton's ragwort Senna senna Senna armata desertsenna Cassia armata Senna artemisioides silver senna Cassia artemisioides Senna bauhinioides twinleaf senna Cassia bauhinioides Cassia bauhinioides var. arizonica Senna covesii Coves' cassia Cassia covesii Senna hirsuta woolly senna Senna hirsuta var. glaberrima woolly senna Cassia leptocarpa var. glaberrima Senna lindheimeriana velvet leaf senna Cassia lindheimeriana Senna wislizeni Wislizenus' senna Cassia wislizeni Sesbania riverhemp Sesbania herbacea bigpod sesbania Darwinia exaltata Sesbania exaltata Sesban exaltatus Sesbania macrocarpa Sesuvium seapurslane Sesuvium verrucosum verrucose seapurslane Sesuvium erectum Setaria bristlegrass Setaria arizonica Arizona bristlegrass Setaria faberi Japanese bristlegrass Setaria grisebachii Grisebach's bristlegrass Setaria italica foxtail bristlegrass Chaetochloa italica Panicum italicum Setaria italica var. metzgeri Setaria italica var. stramineofructa Setaria leucopila streambed bristlegrass Chaetochloa leucopila Setaria liebmannii Liebmann's bristlegrass Setaria parviflora marsh bristlegrass Chaetochloa geniculata Chaetochloa imberbis Panicum geniculatum Setaria geniculata Setaria gracilis Setaria verticillata hooked bristlegrass Chaetochloa verticillata Panicum verticillatum Setaria carnei Setaria villosissima hairyleaf bristlegrass Chaetochloa villosissima Setaria viridis green bristlegrass Setaria viridis var. viridis green bristlegrass Chaetochloa viridis Panicum viride Setaria viridis var. breviseta Setaria viridis var. weinmannii Setaria vulpiseta plains bristlegrass Chaetochloa vulpiseta Panicum vulpisetum Setaria macrostachya Seymeria blacksenna Seymeria bipinnatisecta Eagle Pass blacksenna Seymeria havardii Shepherdia buffaloberry Shepherdia argentea silver buffaloberry Elaeagnus utilis Lepargyrea argentea Shepherdia canadensis russet buffaloberry Elaeagnus canadensis Lepargyrea canadensis Shepherdia rotundifolia roundleaf buffaloberry Sherardia sherardia Sherardia arvensis blue fieldmadder Sibbaldia sibbaldia Sibbaldia procumbens creeping sibbaldia Potentilla sibbaldii Sicyos burr cucumber Sicyos ampelophyllus streamside burr cucumber Sicyos laciniatus cutleaf burr cucumber Sicyos laciniatus var. genuinus Sicyosperma sicyosperma Sicyosperma gracile climbing arrowheads Sida fanpetals Sida abutifolia spreading fanpetals Sida filicaulis Sida filiformis Sida procumbens Sida supina Sida neomexicana New Mexico fanpetals Sida rhombifolia cuban jute Sida spinosa prickly fanpetals Sida alba Sida angustifolia Sida spinosa var. angustifolia Sida tragiifolia earleaf fanpetals Sidalcea checkerbloom Sidalcea neomexicana salt spring checkerbloom Sidalcea neomexicana ssp. neomexicana salt spring checkerbloom Sidalcea neomexicana ssp. thurberi Thurber's checkerbloom Sidalcea neomexicana var. parviflora Sideroxylon bully Sideroxylon lanuginosum gum bully Sideroxylon lanuginosum ssp. rigidum gum bully Bumelia lanuginosa var. rigida Bumelia lanuginosa ssp. rigida Bumelia lanuginosa var. texana Bumelia monticola Bumelia rigida Bumelia texana Silene catchfly Silene acaulis moss campion Silene acaulis var. subacaulescens moss campion Silene acaulis ssp. subacaulescens Silene antirrhina sleepy silene Silene antirrhina var. confinis Silene antirrhina var. depauperata Silene antirrhina var. divaricata Silene antirrhina var. laevigata Silene antirrhina var. subglaber Silene antirrhina var. vaccarifolia Silene drummondii Drummond's campion Silene drummondii var. drummondii Drummond's campion Gastrolychnis drummondii Lychnis drummondii Lychnis pudica Melandrium drummondii Wahlbergella drummondii Silene gallica common catchfly Silene anglica Silene laciniata cardinal catchfly Silene laciniata ssp. greggii cardinal catchfly Silene laciniata var. greggii Silene menziesii Menzies' campion Silene menziesii ssp. menziesii Menzies' campion Silene menziesii ssp. menziesii var. menziesii Menzies' campion Anotites menziesii Silene obovata Silene rectiramea Grand Canyon campion Silene scouleri simple campion Silene scouleri ssp. pringlei simple campion Silene scouleri ssp. pringlei var. concolor simple campion Silene scouleri ssp. pringlei var. eglandulosa simple campion Silene scouleri ssp. pringlei var. leptophylla simple campion Silene scouleri ssp. pringlei var. pringlei simple campion Silene thurberi woolly catchfly Silybum milkthistle Silybum marianum blessed milkthistle Carduus marianus Mariana mariana Simmondsia goatnut Simmondsia chinensis jojoba Buxus chinensis Simmondsia californica Simsia bushsunflower Simsia lagasceiformis annual bushsunflower Simsia exaristata Simsia exaristata var. perplexa Sinapis mustard Sinapis alba white mustard Brassica alba Brassica hirta Sinapis arvensis charlock mustard Brassica arvensis Brassica kaber Brassica kaber var. pinnatifida Brassica kaber var. schkuhriana Siphonoglossa tubetongue Siphonoglossa longiflora longflower tubetongue Adhatoda longiflora Sisymbrium hedgemustard Sisymbrium altissimum tall tumblemustard Norta altissima Sisymbrium irio London rocket Norta irio Sisymbrium orientale Indian hedgemustard Brassica kaber var. orientalis Sisyrinchium blue-eyed grass Sisyrinchium arizonicum Arizona blue-eyed grass Oreolirion arizonicum Sisyrinchium cernuum nodding blue-eyed grass Sisyrinchium powellii Sisyrinchium demissum stiff blue-eyed grass Sisyrinchium demissum var. amethystinum Sisyrinchium longipedunculatum Sisyrinchium idahoense Idaho blue-eyed grass Sisyrinchium idahoense var. occidentale Idaho blue-eyed grass Sisyrinchium occidentale Sisyrinchium longipes timberland blue-eyed grass Sium waterparsnip Sium suave hemlock waterparsnip Sium cicutifolium Sium floridanum Sium suave var. floridanum Solanum nightshade Solanum adscendens sonoita nightshade Solanum deflexum Solanum americanum American black nightshade Solanum americanum var. nodiflorum Solanum americanum var. patulum Solanum caribaeum Solanum fistulosum Solanum hermannii Solanum linnaeanum Solanum nigrum var. americanum Solanum nigrum var. virginicum Solanum nodiflorum Solanum sodomeum Solanum carolinense Carolina horsenettle Solanum carolinense var. carolinense Carolina horsenettle Solanum douglasii greenspot nightshade Solanum nigrum var. douglasii Solanum elaeagnifolium silverleaf nightshade Solanum fendleri Fendler's horsenettle Solanum fendleri var. fendleri Fendler's horsenettle Solanum heterodoxum melonleaf nightshade Solanum heterodoxum var. setigeroides melonleaf nightshade Solanum hindsianum Hinds' nightshade Solanum jamesii wild potato Solanum lumholtzianum Sonoran nightshade Solanum lycopersicum garden tomato Solanum lycopersicum var. lycopersicum garden tomato Lycopersicon esculentum Lycopersicon lycopersicum Lycopersicon pyriforme Solanum physalifolium hoe nightshade Solanum physalifolium var. nitidibaccatum Solanum sarrachoides Solanum villosum Solanum pinnatisectum tansyleaf nightshade Solanum ptychanthum West Indian nightshade Solanum americanum Solanum nigrum Solanum rostratum buffalobur nightshade Androcera rostrata Solanum cornutum Solanum sisymbriifolium sticky nightshade Solanum triflorum cutleaf nightshade Solanum umbelliferum bluewitch nightshade Solanum umbelliferum var. umbelliferum bluewitch nightshade Solanum xanti chaparral nightshade Solanum xanti var. xanti chaparral nightshade Solidago goldenrod Solidago canadensis Canada goldenrod Solidago canadensis var. gilvocanescens shorthair goldenrod Solidago altissima var. gilvocanescens Solidago gilvocanescens Solidago pruinosa Solidago canadensis var. scabra Canada goldenrod Solidago altissima Solidago altissima var. pluricephala Solidago altissima var. procera Solidago hirsutissima Solidago lunellii Solidago missouriensis Missouri goldenrod Solidago missouriensis var. fasciculata Missouri goldenrod Solidago glaberrima Solidago glaberrima var. moritura Solidago missouriensis var. glaberrima Solidago missouriensis var. missouriensis Missouri goldenrod Solidago missouriensis var. extraria Solidago missouriensis var. montana Solidago missouriensis var. tenuissima Missouri goldenrod Solidago tenuissima Solidago multiradiata Rocky Mountain goldenrod Solidago multiradiata var. scopulorum manyray goldenrod Solidago ciliosa Solidago multiradiata ssp. scopulorum Solidago scopulorum Solidago nana baby goldenrod Solidago simplex Mt. Albert goldenrod Solidago simplex ssp. simplex Mt. Albert goldenrod Solidago simplex ssp. simplex var. simplex Mt. Albert goldenrod Solidago glutinosa Solidago neomexicana Solidago spathulata ssp. glutinosa Solidago spathulata var. neomexicana Solidago spectabilis Nevada goldenrod Solidago spectabilis var. spectabilis Nevada goldenrod Solidago velutina threenerve goldenrod Solidago arizonica Solidago canadensis var. arizonica Solidago californica var. nevadensis Solidago howellii Solidago sparsiflora Solidago spathulata var. subcinerea Solidago trinervata Solidago velutina var. nevadensis Solidago wrightii Wright's goldenrod Solidago wrightii var. adenophora Wright's goldenrod Solidago bigelovii Solidago wrightii var. wrightii Wright's goldenrod Solidago bigelovii var. wrightii Sonchus sowthistle Sonchus asper spiny sowthistle Sonchus oleraceus common sowthistle Sophora necklacepod Sophora arizonica Arizona necklacepod Sophora arizonica ssp. formosa Sophora arizonica var. formosa Sophora formosa Sophora nuttalliana silky sophora Sophora sericea Vexibia nuttalliana Sophora stenophylla fringeleaf necklacepod Vexibia stenophylla Sorbus mountain ash Sorbus dumosa Arizona mountain ash Sorghastrum Indiangrass Sorghastrum nutans Indiangrass Andropogon nutans Sorghastrum avenaceum Sorghum sorghum Sorghum bicolor sorghum Sorghum guineense Sorghum nervosum Sorghum bicolor ssp. bicolor grain sorghum Holcus bicolor Holcus sorghum Sorghum bicolor var. caffrorum Sorghum caffrorum Sorghum cernuum Sorghum dochna Sorghum dochna var. technicum Sorghum drummondii Sorghum durra Sorghum saccharatum Sorghum subglabrescens Sorghum vulgare Sorghum vulgare var. caffrorum Sorghum vulgare var. durra Sorghum vulgare var. roxburghii Sorghum vulgare var. saccharatum Sorghum vulgare var. technicum Sorghum bicolor ssp. drummondii Sudangrass Andropogon drummondii Sorghum bicolor var. drummondii Sorghum bicolor var. sudanense Sorghum drummondii Sorghum sudanense Sorghum vulgare var. drummondii Sorghum halepense Johnsongrass Holcus halepensis Sorghum miliaceum Sparganium bur-reed Sparganium angustifolium narrowleaf bur-reed Sparganium acaule Sparganium chlorocarpum var. acaule Sparganium emersum Sparganium emersum var. angustifolium Sparganium emersum var. multipedunculatum Sparganium multipedunculatum Sparganium eurycarpum broadfruit bur-reed Sparganium californicum Sparganium eurycarpum var. greenei Sparganium greenei Sparganium natans small bur-reed Sparganium minimum Spartina cordgrass Spartina gracilis alkali cordgrass Spergularia sandspurry Spergularia salina salt sandspurry Spergularia alata Spergularia leiosperma Spergularia marina Spergularia marina var. leiosperma Spergularia marina var. simonii Spergularia marina var. tenuis Spergularia salina var. tenuis Spergularia sparsiflora Spergularia tenuis var. involucrata Tissa marina Tissa tenuis Spermolepis scaleseed Spermolepis echinata bristly scaleseed Apium echinatum Sphaeralcea globemallow Sphaeralcea ambigua desert globemallow Sphaeralcea ambigua ssp. ambigua apricot globemallow Sphaeralcea ambigua ssp. rosacea rose globemallow Sphaeralcea ambigua var. rosacea Sphaeralcea angustifolia copper globemallow Phymosia cuspidata Sphaeralcea angustifolia ssp. cuspidata Sphaeralcea angustifolia var. cuspidata Sphaeralcea angustifolia ssp. lobata Sphaeralcea angustifolia var. lobata Sphaeralcea angustifolia var. oblongifolia Sphaeralcea cuspidata Sphaeralcea emoryi ssp. nevadensis Sphaeralcea emoryi var. nevadensis Sphaeralcea coccinea scarlet globemallow Sphaeralcea coccinea ssp. coccinea scarlet globemallow Malvastrum coccineum Sphaeralcea coccinea ssp. dissecta Sphaeralcea coccinea var. dissecta Sphaeralcea coccinea ssp. elata scarlet globemallow Sphaeralcea coccinea var. elata Sphaeralcea coulteri Coulter's globemallow Sphaeralcea digitata juniper globemallow Sphaeralcea digitata ssp. digitata juniper globemallow Sphaeralcea emoryi Emory's globemallow Sphaeralcea emoryi ssp. arida Sphaeralcea emoryi var. arida Sphaeralcea emoryi var. californica Sphaeralcea emoryi ssp. variabilis Sphaeralcea emoryi var. variabilis Sphaeralcea fendleri Fendler's globemallow Sphaeralcea fendleri ssp. albescens thicket globemallow Sphaeralcea fendleri var. albescens Sphaeralcea fendleri ssp. elongata thicket globemallow Sphaeralcea fendleri var. elongata Sphaeralcea fendleri ssp. fendleri Fendler's globemallow Sphaeralcea fendleri ssp. tripartita thicket globemallow Sphaeralcea fendleri var. tripartita Sphaeralcea fendleri ssp. venusta thicket globemallow Sphaeralcea fendleri var. venusta Sphaeralcea grossulariifolia gooseberryleaf globemallow Sphaeralcea grossulariifolia ssp. grossulariifolia gooseberryleaf globemallow Sphaeralcea grossulariifolia var. moorei Sphaeralcea grossulariifolia ssp. pedata gooseberryleaf globemallow Sphaeralcea grossulariifolia var. pedata Sphaeralcea hastulata spear globemallow Sphaeralcea subhastata Sphaeralcea subhastata ssp. connata Sphaeralcea subhastata var. connata Sphaeralcea subhastata ssp. latifolia Sphaeralcea subhastata var. latifolia Sphaeralcea subhastata ssp. martii Sphaeralcea subhastata var. martii Sphaeralcea subhastata ssp. pumila Sphaeralcea subhastata var. pumila Sphaeralcea subhastata ssp. thyrsoidea Sphaeralcea subhastata var. thyrsoidea Sphaeralcea incana gray globemallow Sphaeralcea incana ssp. cuneata soft globemallow Sphaeralcea incana var. cuneata Sphaeralcea incana ssp. incana gray globemallow Sphaeralcea laxa caliche globemallow Sphaeralcea leptophylla scaly globemallow Sphaeralcea orcuttii Carrizo Creek globemallow Sphaeralcea parvifolia smallflower globemallow Sphaeralcea rusbyi Rusby's globemallow Sphaeralcea rusbyi ssp. gilensis Gila globemallow Sphaeralcea rusbyi var. gilensis Sphaeralcea rusbyi ssp. rusbyi Rusby's globemallow Sphaeralcea wrightii Wright's globemallow Sphaerophysa sphaerophysa Sphaerophysa salsula alkali swainsonpea Phaca salsula Swainsona salsula Sphenopholis wedgescale Sphenopholis intermedia slender wedgescale Sphenopholis intermedia var. pilosa Sphenopholis obtusata var. major Sphenopholis obtusata prairie wedgescale Aira obtusata Sphenopholis obtusata var. lobata Sphenopholis obtusata var. pubescens Sphinctospermum sphinctospermum Sphinctospermum constrictum hourglass peaseed Tephrosia constricta Spiranthes ladies'-tresses Spiranthes delitescens delighteful ladies'-tresses Spiranthes graminea Canelo ladies'-tresses Spiranthes parasitica parasitic ladies'-tresses Schiedeela parasitica Spiranthes romanzoffiana hooded ladies'-tresses Ibidium strictum Spiranthes stricta Spirodela duckmeat Spirodela polyrrhiza common duckmeat Spirodela polyrrhiza var. masonii Spirodela punctata dotted duckmeat Spirodela oligorrhiza Sporobolus dropseed Sporobolus airoides alkali sacaton Agrostis airoides Sporobolus compositus composite dropseed Sporobolus compositus var. compositus composite dropseed Sporobolus asper Sporobolus asper var. hookeri Sporobolus contractus spike dropseed Sporobolus cryptandrus var. strictus Sporobolus coromandelianus Madagascar dropseed Agrostis pyramidata Sporobolus argutus Sporobolus patens Sporobolus pulvinatus Sporobolus pyramidatus Sporobolus cryptandrus sand dropseed Agrostis cryptandra Sporobolus cryptandrus ssp. fuscicola Sporobolus cryptandrus var. fuscicola Sporobolus cryptandrus var. occidentalis Sporobolus flexuosus mesa dropseed Sporobolus giganteus giant dropseed Sporobolus interruptus black dropseed Sporobolus nealleyi gyp dropseed Sporobolus neglectus puffsheath dropseed Sporobolus vaginiflorus var. neglectus Sporobolus texanus Texas dropseed Sporobolus vaginiflorus poverty dropseed Sporobolus vaginiflorus var. vaginiflorus poverty dropseed Sporobolus vaginiflorus var. inaequalis Sporobolus wrightii big sacaton Sporobolus airoides var. wrightii Stachys hedgenettle Stachys coccinea scarlet hedgenettle Stachys crenata mousesear Stachys agraria Stachys pilosa hairy hedgenettle Stachys pilosa var. pilosa hairy hedgenettle Stachys asperrima Stachys borealis Stachys homotricha Stachys palustris var. homotricha Stachys palustris var. nipigonensis Stachys palustris var. puberula Stachys palustris ssp. pilosa Stachys palustris var. phaneropoda Stachys palustris var. pilosa Stachys scopulorum Stachys teucriifolia Stachys teucriiformis Stachys rothrockii Rothrock's hedgenettle Stanleya princesplume Stanleya albescens white princesplume Stanleya pinnata desert princesplume Stanleya pinnata var. pinnata desert princesplume Cleome pinnata Stanleya pinnata var. typica Stebbinsoseris silverpuffs Stebbinsoseris heterocarpa grassland silverpuffs Microseris heterocarpa Stellaria starwort Stellaria longifolia longleaf starwort Stellaria longifolia var. longifolia longleaf starwort Alsine longifolia Stellaria longipes longstalk starwort Alsine longipes Alsine palmeri Alsine stricta Alsine validus Stellaria dulcis Stellaria edwardsii Stellaria edwardsii var. arctica Stellaria hultenii Stellaria laxmannii Stellaria laeta Stellaria laeta var. altocaulis Stellaria longipes var. altocaulis Stellaria longipes var. edwardsii Stellaria longipes var. laeta Stellaria longifolia var. laeta Stellaria longipes var. monantha Stellaria longipes ssp. monantha Stellaria longipes var. subvestita Stellaria longipes ssp. stricta Stellaria monantha Stellaria monantha ssp. atlantica Stellaria monantha var. atlantica Stellaria monantha var. altocaulis Stellaria palmeri Stellaria stricta Stellaria subvestita Stellaria valida Stellaria media common chickweed Stellaria media ssp. media common chickweed Alsine media Stellaria apetala Stellaria media var. procera Stellaria nitens shiny chickweed Stellaria praecox Stellaria porsildii Porsild's starwort Stellaria umbellata umbrella starwort Alsine baicalensis Stellaria gonomischa Stellaria weberi Stemodia twintip Stemodia durantifolia whitewoolly twintip Capraria durantifolia Stemodia arizonica Stenocereus stenocereus Stenocereus thurberi organpipe cactus Cereus thurberi Lemaireocereus thurberi Pachycereus thurberi Stenogonum buckwheat Stenogonum flexum bent two-whorl buckwheat Eriogonum flexum Eriogonum flexum var. ferronis Stenogonum salsuginosum salty buckwheat Eriogonum salsuginosum Stenorrhynchos ladies'-tresses Stenorrhynchos michuacanus Michuacan ladies'-tresses Spiranthes michuacana Stenotus mock goldenweed Stenotus acaulis stemless mock goldenweed Stenotus acaulis var. acaulis stemless mock goldenweed Haplopappus acaulis Haplopappus acaulis ssp. typicus Stenotus armerioides thrift mock goldenweed Stenotus armerioides var. armerioides thrift mock goldenweed Haplopappus armerioides Stephanomeria wirelettuce Stephanomeria exigua small wirelettuce Stephanomeria exigua ssp. exigua small wirelettuce Lygodesmia bigelovii Stephanomeria exigua var. pentachaeta Stephanomeria exigua ssp. pentachaeta Stephanomeria minor lesser wirelettuce Stephanomeria minor var. minor narrowleaf wirelettuce Stephanomeria tenuifolia Stephanomeria parryi Parry's wirelettuce Stephanomeria pauciflora brownplume wirelettuce Lygodesmia pauciflora Ptiloria pauciflora Stephanomeria cinerea Stephanomeria neomexicana Stephanomeria pauciflora var. parishii Stephanomeria schottii Schott's wirelettuce Stephanomeria spinosa thorn skeletonweed Lygodesmia spinosa Stephanomeria thurberi Thurber's wirelettuce Lygodesmia thurberi Stevia candyleaf Stevia lemmonii Lemmon's candyleaf Stevia micrantha annual candyleaf Stevia plummerae Plummer's candyleaf Stevia plummerae var. alba Plummer's candyleaf Stevia plummerae var. plummerae Plummer's candyleaf Stevia serrata sawtooth candyleaf Stevia serrata var. haplopappa Stevia serrata var. ivifolia Stevia viscida viscid candyleaf Stillingia toothleaf Stillingia linearifolia queen's-root Stillingia paucidentata Mojave toothleaf Stillingia spinulosa annual toothleaf Streptanthella streptanthella Streptanthella longirostris longbeak streptanthella Streptanthella longirostris var. derelicta Streptanthus twistflower Streptanthus carinatus lyreleaf jewelflower Streptanthus carinatus ssp. arizonicus lyreleaf jewelflower Streptanthus arizonicus Streptanthus arizonicus var. luteus Streptanthus carinatus ssp. carinatus lyreleaf jewelflower Disaccanthus validus Streptanthus validus Streptanthus cordatus heartleaf twistflower Streptanthus cordatus var. cordatus heartleaf twistflower Streptanthus lemmonii Lemmon's jewelflower Streptopus twistedstalk Streptopus amplexifolius claspleaf twistedstalk Streptopus amplexifolius var. amplexifolius claspleaf twistedstalk Streptopus amplexifolius var. americanus Streptopus amplexifolius ssp. americanus Streptopus amplexifolius var. denticulatus Streptopus amplexifolius var. grandiflorus Tortipes amplexifolius Uvularia amplexifolia Strophostyles fuzzybean Strophostyles leiosperma slickseed fuzzybean Phaseolus leiospermus Strophostyles pauciflora Stuckenia pondweed Stuckenia filiformis fineleaf pondweed Stuckenia filiformis ssp. alpinus fineleaf pondweed Coleogeton filiformis ssp. alpinus Potamogeton filiformis var. alpinus Potamogeton filiformis var. borealis Potamogeton filiformis var. macounii Stuckenia pectinatus sago pondweed Coleogeton pectinatus Potamogeton pectinatus Stuckenia striatus broadleaf pondweed Potamogeton filiformis var. latifolius Potamogeton latifolius Potamogeton striatus Stylocline neststraw Stylocline gnaphalioides mountain neststraw Stylocline intertexta Morefield's neststraw Stylocline micropoides woollyhead neststraw Stylocline sonorensis Sonoran neststraw Stylosanthes pencilflower Stylosanthes biflora sidebeak pencilflower Stylosanthes biflora var. hispidissima Stylosanthes floridana Stylosanthes riparia Stylosanthes riparia var. setifera Stylosanthes humilis Townsville stylo Suaeda seepweed Suaeda calceoliformis seepweed Dondia depressa Schoberia occidentalis Suaeda americana Suaeda depressa Suaeda depressa var. erecta Suaeda maritima var. americana Suaeda minutiflora Suaeda occidentalis Suaeda moquinii Mojave seablite Dondia fruticosa Suaeda fruticosa Suaeda intermedia Suaeda nigra Suaeda ramosissima Suaeda torreyana Suaeda torreyana var. ramosissima Suaeda suffrutescens desert seepweed Suaeda suffrutescens var. suffrutescens desert seepweed Swertia felwort Swertia perennis felwort Swertia perennis var. obtusa Symphoricarpos snowberry Symphoricarpos longiflorus desert snowberry Symphoricarpos oreophilus mountain snowberry Symphoricarpos oreophilus var. oreophilus mountain snowberry Symphoricarpos rotundifolius var. oreophilus Symphoricarpos oreophilus var. utahensis Utah snowberry Symphoricarpos tetonensis Symphoricarpos utahensis Symphoricarpos vaccinioides Symphoricarpos palmeri Palmer's snowberry Symphoricarpos rotundifolius roundleaf snowberry Symphoricarpos rotundifolius var. parishii Parish's snowberry Symphoricarpos oreophilus var. parishii Symphoricarpos parishii Symphyotrichum aster Symphyotrichum ascendens western aster Aster adscendens Aster ascendens Aster chilensis ssp. adscendens Aster macounii Aster subgriseus Virgulaster ascendens Symphyotrichum eatonii Eaton's aster Aster bracteolatus Aster cordalenus Aster eatonii Aster foliaceus var. eatonii Aster mearnsii Aster oregonus Symphyotrichum bracteolatum Symphyotrichum ericoides white heath aster Symphyotrichum ericoides var. ericoides white heath aster Aster ericoides Aster multiflorus Aster multiflorus var. exiguus Aster polycephalus Lasallea ericoides Virgulus ericoides Symphyotrichum expansum southwestern annual saltmarsh aster Aster inconspicuus Aster subulatus var. cubensis Tripolium subulatum var. parviflorum Symphyotrichum falcatum white prairie aster Symphyotrichum falcatum var. commutatum white prairie aster Aster commutatus Aster cordineri Aster commutatus var. polycephalus Aster polycephalus Aster ericoides var. commutatus Aster falcatus var. commutatus Aster falcatus ssp. commutatus Aster multiflorus var. commutatus Aster nahanniensis Symphyotrichum falcatum var. crassulum white prairie aster Aster adsurgens Aster commutatus var. crassulus Aster crassulus Aster falcatus var. crassulus Symphyotrichum falcatum var. falcatum white prairie aster Aster elegantulus Aster ericoides var. commutatus Aster falcatus Aster ramulosus Lasallea falcata Virgulus falcatus Symphyotrichum foliaceum alpine leafybract aster Symphyotrichum foliaceum var. canbyi Canby's aster Aster foliaceus var. burkei Aster foliaceus var. canbyi Aster phyllodes Aster tweedyi Symphyotrichum foliaceum var. parryi Parry's aster Aster ascendens var. parryi Aster diabolicus Aster foliaceus var. frondeus Aster foliaceus var. parryi Aster foliaceus var. subpetiolatus Aster frondeus Symphyotrichum frondosum short-rayed alkalai aster Aster frondosus Brachyactis frondosa Tripolium frondosum Symphyotrichum laeve smooth blue aster Symphyotrichum laeve var. geyeri Geyer's aster Aster geyeri Aster laevis var. geyeri Aster laevis var. guadalupensis Aster pickettianus Symphyotrichum lanceolatum white panicle aster Symphyotrichum lanceolatum ssp. hesperium white panicle aster Symphyotrichum lanceolatum ssp. hesperium var. hesperium white panicle aster Aster hesperius Aster hesperius var. laetevirens Aster hesperius var. wootonii Aster laetevirens Aster lanceolatus ssp. hesperius Aster osterhoutii Aster wootonii Symphyotrichum hesperium Symphyotrichum potosinum Santa Rita Mountain aster Aster lemmonii Aster potosinus Syntrichopappus Fremont's-gold Syntrichopappus fremontii yellowray Fremont's-gold Tagetes marigold Tagetes lemmonii Lemmon's marigold Tagetes alamensis Tagetes palmeri Tagetes micrantha licorice marigold Tagetes fragrantissima Talinum fameflower Talinum aurantiacum orange fameflower Talinum angustissimum Talinum aurantiacum var. angustissimum Talinum brevifolium pygmy fameflower Talinum gooddingii Goodding's fameflower Talinum humile Pinos Altos fameflower Talinum marginatum tepic fameflower Talinum paniculatum jewels of Opar Talinum paniculatum var. paniculatum jewels of Opar Portulaca paniculata Talinum reflexum Talinum parviflorum sunbright Talinum appalachianum Talinum validulum Tusayan fameflower Tamarix tamarisk Tamarix africana African tamarisk Tamarix aphylla Athel tamarisk Tamarix articulata Tamarix canariensis Canary Island tamarisk Tamarix chinensis fivestamen tamarisk Tamarix pentandra Tamarix parviflora smallflower tamarisk Tamarix tetrandra Tamarix ramosissima saltcedar Tanacetum tansy Tanacetum vulgare common tansy Chrysanthemum uliginosum Chrysanthemum vulgare Tanacetum vulgare var. crispum Taraxacum dandelion Taraxacum laevigatum rock dandelion Leontodon erythrospermum Taraxacum disseminatum Taraxacum erythrospermum Taraxacum lacistophyllum Taraxacum scanicum Taraxacum lyratum harp dandelion Taraxacum kamtschaticum Taraxacum scopulorum Taraxacum sibiricum Taraxacum officinale common dandelion Taraxacum officinale ssp. officinale common dandelion Taraxacum atroglaucum Taraxacum campylodes Taraxacum croceum Taraxacum curvidens Taraxacum cyclocentrum Taraxacum dahlstedtii Taraxacum davidssonii Taraxacum devians Taraxacum dilutisquameum Taraxacum firmum Taraxacum islandiciforme Taraxacum kok-saghyz Taraxacum officinale var. palustre Taraxacum pleniflorum Taraxacum retroflexum Taraxacum rhodolepis Taraxacum undulatum Taraxacum vagans Taraxacum xanthostigma Tecoma trumpetbush Tecoma stans yellow trumpetbush Bignonia stans Stenolobium stans Tecoma stans var. angustatum Tephrosia hoarypea Tephrosia leiocarpa smoothpod hoarypea Cracca leiocarpa Tephrosia affinis Tephrosia viridis Tephrosia tenella red hoarypea Tephrosia thurberi Thurber's hoarypea Cracca thurberi Tetraclea tetraclea Tetraclea coulteri Coulter's wrinklefruit Tetraclea coulteri var. angustifolia Tetracoccus shrubby-spurge Tetracoccus hallii Hall's shrubby-spurge Halliophytum fasciculatum Halliophytum fasciculatum var. hallii Halliophytum hallii Tetracoccus fasciculatus Tetracoccus fasciculatus var. hallii Tetradymia horsebrush Tetradymia argyraea striped cottonthorn Tetradymia axillaris longspine horsebrush Tetradymia axillaris var. longispina longspine horsebrush Tetradymia spinosa var. longispina Tetradymia canescens spineless horsebrush Tetradymia canescens var. inermis Tetradymia stenolepis Mojave cottonthorn Tetramerium tetramerium Tetramerium nervosum hairy fournwort Tetramerium hispidum Tetramerium nervosum var. hispidum Tetraneuris four-nerve daisy Tetraneuris acaulis stemless four-nerve daisy Tetraneuris acaulis var. arizonica Arizona four-nerve daisy Actinea acaulis var. arizonica Hymenoxys acaulis var. arizonica Tetraneuris argentea perkysue Actinella argentea Hymenoxys argentea Tetraneuris brandegeei Brandegee's four-nerve daisy Hymenoxys brandegeei Rydbergia brandegeei Tetraneuris ivesiana Ives' fournerved daisy Hymenoxys acaulis var. ivesiana Hymenoxys argentea var. ivesiana Hymenoxys ivesiana Tetraneuris mancosensis Tetraneuris pilosa Teucrium germander Teucrium canadense Canada germander Teucrium canadense var. canadense Canada germander Teucrium canadense var. angustatum Teucrium canadense var. littorale Teucrium canadense var. virginicum Teucrium littorale Teucrium canadense var. occidentale western germander Teucrium boreale Teucrium canadense var. boreale Teucrium canadense ssp. occidentale Teucrium canadense ssp. viscidum Teucrium occidentale Teucrium occidentale var. boreale Teucrium cubense small coastal germander Teucrium cubense var. densum small coastal germander Teucrium cubense ssp. depressum Teucrium depressum Teucrium glandulosum common germander Thalictrum meadow-rue Thalictrum dasycarpum purple meadow-rue Thalictrum dasycarpum var. hypoglaucum Thalictrum hypoglaucum Thalictrum fendleri Fendler's meadow-rue Thalictrum fendleri var. fendleri Fendler's meadow-rue Thalictrum fendleri var. platycarpum Thalictrum fendleri var. wrightii Wright's meadow-rue Thalictrum revolutum waxyleaf meadow-rue Thalictrum revolutum var. glandulosior Thamnosma desertrue Thamnosma montana turpentinebroom Thamnosma texana rue of the mountains Thelesperma greenthread Thelesperma longipes longstalk greenthread Thelesperma megapotamicum Hopi tea greenthread Bidens megapotamica Thelesperma gracile Thelesperma subnudum Navajo tea Thelesperma subnudum var. subnudum Navajo tea Thelypodiopsis tumblemustard Thelypodiopsis ambigua Long Valley tumblemustard Thelypodiopsis ambigua var. ambigua Long Valley tumblemustard Sisymbrium ambiguum Thelypodium ambiguum Thelypodiopsis ambigua var. erecta Long Valley tumblemustard Thelypodiopsis purpusii Purpus' tumblemustard Sisymbrium kearneyi Sisymbrium purpusii Sisymbrium vernale Thelypodium purpusii Thelypodium vernale Thelypodium thelypody Thelypodium integrifolium entireleaved thelypody Thelypodium integrifolium ssp. gracilipes entireleaved thelypody Thelypodium integrifolium var. gracilipes Thelypodium rhomboideum var. gracilipes Thelypodium integrifolium ssp. longicarpum entireleaved thelypody Thelypodium wrightii Wright's thelypody Thelypodium wrightii ssp. wrightii Wright's thelypody Stanleyella wrightii Thelypteris maiden fern Thelypteris puberula showy maiden fern Thelypteris puberula var. sonorensis Sonoran maiden fern Thermopsis goldenbanner Thermopsis montana mountain goldenbanner Thermopsis montana var. montana mountain goldenbanner Thermopsis rhombifolia var. montana Thinopyrum wheatgrass Thinopyrum intermedium intermediate wheatgrass Agropyron intermedium Agropyron intermedium var. trichophorum Agropyron trichophorum Elymus hispidus Elymus hispidus ssp. barbulatus Elymus hispidus var. ruthenicus Elytrigia intermedia Elytrigia intermedia ssp. barbulata Elytrigia intermedia ssp. trichophora Thinopyrum intermedium ssp. barbulatum Thinopyrum ponticum rush wheatgrass Agropyron elongatum Agropyron varnense Elytrigia elongata Elymus elongatus Elymus elongatus var. ponticus Elytrigia pontica Elymus varnensis Lophopyrum elongatum Thlaspi pennycress Thlaspi arvense field pennycress Thlaspi montanum alpine pennycress Thlaspi montanum var. fendleri Fendler's pennycress Thlaspi fendleri Thlaspi prolixum Thlaspi stipitatum Thlaspi montanum var. montanum alpine pennycress Noccaea cochleariformis Noccaea montana Thlaspi alpestre Thlaspi alpestre var. glaucum Thlaspi australe Thlaspi cochleariforme Thlaspi fendleri var. coloradense Thlaspi fendleri var. glaucum Thlaspi fendleri var. hesperium Thlaspi fendleri var. tenuipes Thlaspi glaucum Thlaspi glaucum var. hesperium Thlaspi glaucum var. pedunculatum Thlaspi hesperium Thymophylla pricklyleaf Thymophylla acerosa pricklyleaf dogweed Dyssodia acerosa Thymophylla concinna Sonoran pricklyleaf Dyssodia concinna Thymophylla pentachaeta fiveneedle pricklyleaf Thymophylla pentachaeta var. belenidium fiveneedle pricklyleaf Dyssodia belenidium Dyssodia pentachaeta var. belenidium Dyssodia thurberi Thymophylla pentachaeta var. hartwegii Hartweg's pricklyleaf Dyssodia hartwegii Dyssodia pentachaeta var. hartwegii Dyssodia pentachaeta ssp. hartwegii Thysanocarpus fringepod Thysanocarpus curvipes sand fringepod Thysanocarpus amplectens Thysanocarpus curvipes var. elegans Thysanocarpus curvipes var. eradiatus Thysanocarpus curvipes var. longistylus Thysanocarpus elegans Tidestromia honeysweet Tidestromia lanuginosa woolly tidestromia Cladothrix lanuginosa Tidestromia oblongifolia Arizona honeysweet Tillandsia airplant Tillandsia recurvata small ballmoss Diaphoranthema recurvata Renealmia recurvata Tiquilia crinklemat Tiquilia canescens woody crinklemat Tiquilia canescens var. canescens woody crinklemat Coldenia canescens Coldenia canescens var. subnuda Tiquilia canescens var. pulchella woody crinklemat Coldenia canescens var. pulchella Tiquilia latior matted crinklemat Coldenia hispidissima var. latior Tiquilia nuttallii Nuttall's crinklemat Coldenia nuttallii Tiquilia palmeri Palmer's crinklemat Coldenia palmeri Tiquiliopsis palmeri Tiquilia plicata fanleaf crinklemat Coldenia plicata Tiquilia brevifolia var. plicata Tithonia tithonia Tithonia thurberi Arizona sunflowerweed Tordylium tordylium Tordylium apulum Mediterranean hartwort Torilis hedgeparsley Torilis nodosa knotted hedgeparsley Torreyochloa false mannagrass Torreyochloa pallida pale false mannagrass Torreyochloa pallida var. pauciflora pale false mannagrass Glyceria otisii Glyceria pauciflora Puccinellia pauciflora Puccinellia pauciflora var. holmii Puccinellia pauciflora var. microtheca Torreyochloa pauciflora Torreyochloa pauciflora var. holmii Torreyochloa pauciflora var. microtheca Townsendia Townsend daisy Townsendia annua annual Townsend daisy Townsendia exscapa stemless Townsend daisy Aster exscapus Townsendia intermedia Townsendia sericea Townsendia formosa smooth Townsend daisy Townsendia pinetorum Townsendia incana hoary Townsend daisy Townsendia arizonica Townsendia jonesii Jones' Townsend daisy Townsendia jonesii var. jonesii Jones' Townsend daisy Townsendia mensana var. jonesii Townsendia leptotes common Townsend daisy Townsendia sericea var. leptotes Townsendia smithii Black Rock Townsend daisy Townsendia strigosa hairy Townsend daisy Toxicodendron poison oak Toxicodendron radicans eastern poison ivy Toxicodendron radicans ssp. divaricatum eastern poison ivy Toxicodendron radicans var. divaricatum Toxicodendron rydbergii western poison ivy Rhus radicans var. rydbergii Rhus radicans var. vulgaris Rhus toxicodendron var. vulgaris Toxicodendron desertorum Toxicodendron radicans var. rydbergii Trachypogon crinkleawn grass Trachypogon spicatus spiked crinkleawn Heteropogon secundus Trachypogon montufari Trachypogon secundus Tradescantia spiderwort Tradescantia occidentalis prairie spiderwort Tradescantia occidentalis var. occidentalis prairie spiderwort Tradescantia occidentalis var. typica Tradescantia occidentalis var. scopulorum prairie spiderwort Tradescantia scopulorum Tradescantia pinetorum pinewoods spiderwort Aneilema pinetorum Tragia noseburn Tragia amblyodonta dogtooth noseburn Tragia laciniata Sonoita noseburn Tragia nepetifolia catnip noseburn Tragia nepetifolia var. dissecta catnip noseburn Tragia ramosa branched noseburn Tragia angustifolia Tragia nepetifolia var. ramosa Tragia stylaris Tragopogon goatsbeard Tragopogon dubius yellow salsify Tragopogon dubius ssp. major Tragopogon major Tragopogon mirus remarkable goatsbeard Tragopogon miscellus Moscow salsify Tragopogon porrifolius salsify Tragopogon pratensis Jack-go-to-bed-at-noon Tragus burr grass Tragus berteronianus spiked burr grass Nazia aliena Trautvetteria bugbane Trautvetteria caroliniensis Carolina bugbane Trautvetteria caroliniensis var. occidentalis western bugbane Trautvetteria grandis Trianthema trianthema Trianthema portulacastrum desert horsepurslane Tribulus punturevine Tribulus terrestris puncturevine Tricardia tricardia Tricardia watsonii threehearts Trichoptilium trichoptilium Trichoptilium incisum yellowdome Trichostema bluecurls Trichostema arizonicum Arizona bluecurls Trichostema micranthum smallflower bluecurls Tridens tridens Tridens eragrostoides lovegrass tridens Triodia eragrostoides Tridens muticus slim tridens Tridens muticus var. elongatus slim tridens Triodia elongata Tridens elongatus Tridens xoklahomensis pro sp. Tridens muticus var. muticus slim tridens Triodia mutica Trifolium clover Trifolium albopurpureum rancheria clover Trifolium albopurpureum var. neolagopus Trifolium columbianum Trifolium columbianum var. argillorum Trifolium helleri Trifolium macraei var. albopurpureum Trifolium neolagopus Trifolium olivaceum var. columbianum Trifolium olivaceum var. griseum Trifolium petrophilum Trifolium amabile Aztec clover Trifolium andinum Intermountain clover Trifolium andinum var. andinum Intermountain clover Trifolium dasyphyllum alpine clover Trifolium dubium suckling clover Trifolium gracilentum pinpoint clover Trifolium gracilentum var. gracilentum pinpoint clover Trifolium gracilentum var. inconspicuum Trifolium gymnocarpon hollyleaf clover Trifolium gymnocarpon ssp. gymnocarpon hollyleaf clover Trifolium gymnocarpon var. subcaulescens Trifolium nemorale Trifolium subcaulescens Trifolium gymnocarpon ssp. plummerae Plummer's clover Trifolium gymnocarpon var. plummerae Trifolium plummerae Trifolium hybridum alsike clover Trifolium elegans Trifolium hybridum var. elegans Trifolium hybridum ssp. elegans Trifolium hybridum var. pratense Trifolium kingii King's clover Trifolium kingii ssp. macilentum King's clover Trifolium kingii var. macilentum Trifolium macilentum Trifolium longipes longstalk clover Trifolium longipes ssp. pygmaeum pygmy clover Trifolium longipes var. brachypus Trifolium longipes var. pygmaeum Trifolium longipes var. rusbyi Trifolium rusbyi Trifolium longipes ssp. reflexum droopflower clover Trifolium longipes var. reflexum Trifolium oreganum var. rydbergii Trifolium rusbyi ssp. reflexum Trifolium rydbergii Trifolium microcephalum smallhead clover Trifolium mucronatum cusp clover Trifolium mucronatum ssp. lacerum spinytooth clover Trifolium arizonicum Trifolium involucratum var. arizonicum Trifolium lacerum Trifolium mucronatum var. arizonicum Trifolium oxydon Trifolium wormskioldii var. arizonicum Trifolium neurophyllum White Mountain clover Trifolium longipes var. neurophyllum Trifolium rusbyi ssp. neurophyllum Trifolium pinetorum woods clover Trifolium longicaule Trifolium willdenowii var. longicaule Trifolium wormskioldii var. longicaule Trifolium pratense red clover Trifolium pratense var. frigidum Trifolium pratense var. sativum Trifolium repens white clover Trifolium variegatum whitetip clover Trifolium appendiculatum Trifolium geminiflorum Trifolium melananthum Trifolium polyodon Trifolium trilobatum Trifolium variegatum var. major Trifolium variegatum var. melananthum Trifolium variegatum var. rostratum Trifolium variegatum var. trilobatum Trifolium wormskioldii cows clover Lupinaster wormskioldii Trifolium fendleri Trifolium fimbriatum Trifolium heterodon Trifolium involucratum var. fendleri Trifolium involucratum var. fimbriatum Trifolium involucratum var. heterodon Trifolium involucratum var. kennedianum Trifolium kennedianum Trifolium spinulosum Trifolium willdenovii Trifolium willdenowii var. fimbriatum Trifolium willdenowii var. kennedianum Trifolium wormskioldii var. fimbriatum Trifolium wormskioldii var. kennedianum Triglochin arrowgrass Triglochin maritimum seaside arrowgrass Triglochin concinnum var. debile Triglochin debile Triglochin elatum Triglochin maritimum var. elatum Triodanis Venus' looking-glass Triodanis holzingeri Holzinger's Venus' looking-glass Specularia holzingeri Triodanis perfoliata clasping Venus' looking-glass Triodanis perfoliata var. biflora clasping Venus' looking-glass Specularia biflora Triodanis biflora Triodanis perfoliata var. perfoliata clasping Venus' looking-glass Legousia perfoliata Specularia perfoliata Tripsacum gamagrass Tripsacum lanceolatum Mexican gamagrass Tripterocalyx sandpuffs Tripterocalyx carnea winged sandpuffs Tripterocalyx carnea var. wootonii Wooton's sandpuffs Tripterocalyx wootonii Tripterocalyx micranthus smallflower sandverbena Abronia cycloptera Abronia micrantha Abronia micrantha var. pedunculata Tripterocalyx cyclopterus Tripterocalyx pedunculatus Trisetum oatgrass Trisetum canescens tall trisetum Trisetum cernuum Trisetum cernuum var. canescens Trisetum cernuum ssp. canescens Trisetum cernuum var. projectum Trisetum spicatum var. projectum Trisetum interruptum prairie false oat Trisetum spicatum spike trisetum Aira spicata Trisetum montanum Trisetum montanum var. shearii Trisetum spicatum ssp. alaskanum Trisetum spicatum var. alaskanum Trisetum spicatum ssp. congdonii Trisetum spicatum var. congdonii Trisetum spicatum var. maidenii Trisetum spicatum ssp. majus Trisetum spicatum ssp. molle Trisetum spicatum ssp. montanum Trisetum spicatum var. majus Trisetum spicatum var. molle Trisetum spicatum var. pilosiglume Trisetum spicatum ssp. pilosiglume Trisetum spicatum var. spicatiforme Trisetum spicatum var. villosissimum Trisetum subspicatum Trisetum triflorum Trisetum triflorum ssp. molle Trisetum villosissimum Triteleia triteleia Triteleia lemmoniae Oak Creek triteleia Brodiaea lemmoniae Triteleiopsis Bajalily Triteleiopsis palmeri Palmer's Bajalily Brodiaea palmeri Trixis threefold Trixis californica American threefold Tumamoca tumamoca Tumamoca macdougalii Tumamoc globeberry Typha cattail Typha domingensis southern cattail Typha angustata Typha latifolia broadleaf cattail Ulmus elm Ulmus pumila Siberian elm Urochloa signalgrass Urochloa arizonica Arizona signalgrass Brachiaria arizonica Panicum arizonicum Urochloa fasciculata browntop signalgrass Brachiaria fasciculata Brachiaria fasciculata var. reticulata Panicum fasciculatum Panicum fasciculatum var. reticulatum Urochloa fasciculata var. reticulata Urochloa maxima guineagrass Panicum maximum Urochloa texana Texas signalgrass Brachiaria texana Panicum texanum Uropappus silverpuffs Uropappus lindleyi Lindley's silverpuffs Microseris linearifolia Microseris lindleyi Uropappus linearifolius Urtica nettle Urtica dioica stinging nettle Urtica dioica ssp. gracilis California nettle Urtica californica Urtica cardiophylla Urtica dioica var. angustifolia Urtica dioica var. californica Urtica dioica var. gracilis Urtica dioica var. lyallii Urtica dioica var. procera Urtica gracilis Urtica lyallii Urtica lyallii var. californica Urtica major Urtica procera Urtica serra Urtica strigosissima Urtica viridis Urtica dioica ssp. holosericea stinging nettle Urtica breweri Urtica dioica var. holosericea Urtica dioica var. occidentalis Urtica gracilis var. greenei Urtica gracilis ssp. holosericea Urtica gracilis var. holosericea Urtica holosericea Urtica trachycarpa Urtica gracilenta mountain nettle Urtica urens dwarf nettle Utricularia bladderwort Utricularia macrorhiza common bladderwort Utricularia vulgaris Utricularia vulgaris var. americana Utricularia vulgaris ssp. macrorhiza Vaccaria soapwort Vaccaria hispanica cow soapwort Saponaria vaccaria Vaccaria pyramidata Vaccaria segetalis Vaccaria vaccaria Vaccaria vulgaris Vaccinium blueberry Vaccinium geminiflorum Mexican blueberry Vaccinium membranaceum thinleaf huckleberry Vaccinium coccineum Vaccinium globulare Vaccinium membranaceum var. rigidum Vaccinium myrtillus whortleberry Vaccinium myrtillus var. oreophilum whortleberry Vaccinium myrtillus ssp. oreophilum Vaccinium oreophilum Valeriana valerian Valeriana acutiloba sharpleaf valerian Valeriana acutiloba var. acutiloba sharpleaf valerian Valeriana capitata ssp. acutiloba Valeriana arizonica Arizona valerian Valeriana acutiloba var. ovata Valeriana ovata Valeriana edulis tobacco root Valeriana edulis var. edulis tobacco root Valeriana occidentalis western valerian Valeriana sorbifolia pineland valerian Vallisneria eelgrass Vallisneria americana American eelgrass Vallisneria asiatica Vallisneria neotropicalis Vallisneria spiralis Vallisneria spiralis var. asiatica Vanclevea vanclevea Vanclevea stylosa pillar false gumweed Grindelia stylosa Vauquelinia rosewood Vauquelinia californica Arizona rosewood Vauquelinia californica ssp. californica Arizona rosewood Spiraea californica Vauquelinia californica ssp. pauciflora Arizona rosewood Vauquelinia pauciflora Vauquelinia californica ssp. sonorensis Sonora rosewood Veratrum false hellebore Veratrum californicum California false hellebore Veratrum californicum var. californicum California false hellebore Veratrum speciosum Verbascum mullein Verbascum blattaria moth mullein Verbascum thapsus common mullein Verbascum virgatum wand mullein Verbena vervain Verbena bonariensis purpletop vervain Verbena bonariensis var. bonariensis purpletop vervain Verbena bracteata bigbract verbena Verbena bracteosa Verbena imbricata Verbena carolina Carolina vervain Verbena ehrenbergiana Ehrenberg's vervain Verbena gracilis Fort Huachuca vervain Verbena halei Texas vervain Verbena officinalis ssp. halei Verbena hastata swamp verbena Verbena hastata var. scabra swamp verbena Verbena macdougalii MacDougal verbena Verbena menthifolia mint vervain Verbena neomexicana hillside vervain Verbena neomexicana var. hirtella hillside vervain Verbena neomexicana var. neomexicana hillside vervain Verbena neomexicana var. xylopoda hillside vervain Verbena perennis pinleaf vervain Verbena pinetorum Chihuahuan vervain Verbena plicata fanleaf vervain Verbena plicata var. plicata fanleaf vervain Verbena scabra sandpaper vervain Verbena stricta hoary verbena Verbena xutha Gulf vervain Verbesina crownbeard Verbesina encelioides golden crownbeard Verbesina encelioides ssp. exauriculata golden crownbeard Verbesina encelioides var. exauriculata Verbesina exauriculata Ximenesia encelioides var. exauriculata Ximenesia exauriculata Verbesina longifolia longleaf crownbeard Actinomeris longifolia Verbesina rothrockii Rothrock's crownbeard Vernonia ironweed Vernonia marginata plains ironweed Vernonia marginata var. tenuifolia Veronica speedwell Veronica americana American speedwell Veronica anagallis-aquatica water speedwell Veronica anagallis Veronica catenata Veronica catenata var. glandulosa Veronica comosa Veronica connata Veronica comosa var. glaberrima Veronica comosa var. glandulosa Veronica connata ssp. glaberrima Veronica connata var. glaberrima Veronica connata var. typica Veronica glandifera Veronica xlackschewitzii Veronica micromeria Veronica salina Veronica arvensis corn speedwell Veronica peregrina neckweed Veronica peregrina ssp. xalapensis hairy purslane speedwell Veronica peregrina var. xalapensis Veronica sherwoodii Veronica xalapensis Veronica persica birdeye speedwell Pocilla persica Veronica persica var. aschersoniana Veronica persica var. corrensiana Veronica polita gray field speedwell Pocilla polita Veronica didyma Veronica serpyllifolia thymeleaf speedwell Veronica serpyllifolia ssp. humifusa brightblue speedwell Veronica humifusa Veronica serpyllifolia var. borealis Veronicastrum serpyllifolium ssp. humifusum Veronica serpyllifolia var. humifusa Veronica tenella Veronica wormskjoldii American alpine speedwell Veronica alpina var. alterniflora Veronica alpina var. cascadensis Veronica alpina var. geminiflora Veronica alpina var. nutans Veronica alpina var. terrae-novae Veronica alpina var. unalaschcensis Veronica nutans Veronica stelleri var. glabrescens Veronica wormskjoldii ssp. alterniflora Vicia vetch Vicia americana American vetch Vicia americana ssp. americana American vetch Vicia americana ssp. oregana Vicia americana var. oregana Vicia americana var. truncata Vicia americana var. villosa Vicia californica Vicia californica var. madrensis Vicia oregana Vicia sparsifolia var. truncata Vicia leucophaea Mogollon Mountain vetch Vicia ludoviciana Louisiana vetch Vicia ludoviciana ssp. ludoviciana Louisiana vetch Vicia exigua Vicia leavenworthii var. occidentalis Vicia ludoviciana var. laxiflora Vicia ludoviciana var. texana Vicia producta Vicia texana Vicia pulchella sweetclover vetch Vicia sativa garden vetch Vicia sativa ssp. nigra garden vetch Vicia angustifolia Vicia angustifolia var. segetalis Vicia angustifolia var. uncinata Vicia sativa var. angustifolia Vicia sativa var. nigra Vicia sativa var. segetalis Vicia villosa winter vetch Vicia villosa ssp. villosa winter vetch Viguiera goldeneye Viguiera cordifolia heartleaf goldeneye Viguiera dentata toothleaf goldeneye Viguiera dentata var. dentata toothleaf goldeneye Helianthus dentatus Viguiera dentata var. lancifolia toothleaf goldeneye Viguiera parishii Parish's goldeneye Viguiera deltoidea var. parishii Viguiera triloba yellow streamers Zaluzania grayana Vinca periwinkle Vinca major bigleaf periwinkle Vinca major var. variegata Vinca minor common periwinkle Viola violet Viola adunca hookedspur violet Viola bicolor field pansy Viola kitaibeliana Viola kitaibeliana var. rafinesquei Viola rafinesquei Viola canadensis Canadian white violet Viola canadensis var. rugulosa creepingroot violet Viola rugulosa Viola canadensis var. scariosa Canadian white violet Viola charlestonensis Charleston Mountain violet Viola purpurea var. charlestonensis Viola nephrophylla northern bog violet Viola maccabeana Viola nephrophylla var. arizonica Viola nephrophylla var. cognata Viola pratincola Viola retusa Viola odorata sweet violet Viola palustris marsh violet Viola palustris var. brevipes marsh violet Viola pedatifida prairie violet Viola palmata var. pedatifida Viola purpurea goosefoot violet Viola purpurea ssp. mohavensis goosefoot violet Viola aurea ssp. arizonensis Viola aurea ssp. mohavensis Viola umbraticola Ponderosa violet Viola umbraticola var. glaberrima Ponderosa violet Viola vallicola sagebrush violet Viola vallicola var. vallicola sagebrush violet Viola nuttallii var. vallicola Viola nuttallii ssp. vallicola Viola russellii Vitex chastetree Vitex agnus-castus lilac chastetree Vitex agnus-castus var. agnus-castus lilac chastetree Vitis grape Vitis arizonica canyon grape Vitis arizonica var. glabra Vitis arizonica var. galvinii Vitis treleasei Vulpia fescue Vulpia bromoides brome fescue Bromus dertonensis Festuca bromoides Festuca dertonensis Vulpia dertonensis Vulpia microstachys small fescue Vulpia microstachys var. ciliata Eastwood fescue Festuca eastwoodiae Festuca grayi Festuca microstachys var. ciliata Vulpia eastwoodiae Vulpia grayi Vulpia microstachys var. microstachys desert fescue Festuca arida Festuca microstachys Vulpia arida Vulpia microstachys var. pauciflora Pacific fescue Festuca microstachys var. pauciflora Festuca microstachys var. simulans Festuca pacifica Festuca pacifica var. simulans Festuca reflexa Vulpia pacifica Vulpia reflexa Vulpia myuros rat-tail fescue Festuca megalura Festuca megalura var. hirsuta Festuca myuros Vulpia megalura Vulpia myuros var. hirsuta Vulpia octoflora sixweeks fescue Vulpia octoflora var. glauca sixweeks fescue Festuca gracilenta Festuca octoflora var. glauca Festuca octoflora var. tenella Festuca tenella Festuca tenella var. glauca Vulpia octoflora var. tenella Vulpia octoflora var. hirtella sixweeks fescue Festuca octoflora var. hirtella Festuca octoflora ssp. hirtella Vulpia octoflora var. octoflora sixweeks fescue Festuca octoflora Festuca octoflora var. aristulata Waltheria waltheria Waltheria indica uhaloa Waltheria americana Waltheria indica var. americana Waltheria pyrolifolia Washingtonia fan palm Washingtonia filifera California fan palm Brahea filamentosa Brahea filifera Neowashingtonia filamentosa Pritchardia filamentosa Pritchardia filifera Washingtonia filamentosa Washingtonia filifera var. robusta Wislizenia wislizenia Wislizenia refracta spectacle fruit Wislizenia refracta ssp. refracta spectacle fruit Wislizenia refracta var. melilotoides Woodsia cliff fern Woodsia cochisensis Cochise cliff fern Woodsia neomexicana New Mexico cliff fern Woodsia oregana Oregon cliff fern Woodsia oregana ssp. cathcartiana Oregon cliff fern Woodsia cathcartiana Woodsia oregana var. cathcartiana Woodsia phillipsii Phillips' cliff fern Woodsia plummerae Plummer's cliff fern Woodsia scopulina Rocky Mountain woodsia Woodsia scopulina ssp. laurentiana Laurent's cliff fern Woodwardia chainfern Woodwardia fimbriata giant chainfern Woodwardia chamissoi Wyethia mule-ears Wyethia arizonica Arizona mule-ears Wyethia scabra badlands mule-ears Wyethia scabra var. attenuata badlands mule-ears Wyethia scabra var. canescens badlands mule-ears Wyethia scabra var. scabra badlands mule-ears Xanthisma sleepydaisy Xanthisma texanum Texas sleepydaisy Xanthisma texanum ssp. drummondii Drummond's sleepydaisy Xanthisma texanum var. drummondii Xanthium cocklebur Xanthium spinosum spiny cockleburr Acanthoxanthium spinosum Xanthium spinosum var. inerme Xanthium strumarium rough cockleburr Xanthium strumarium var. canadense Canada cockleburr Xanthium acerosum Xanthium californicum Xanthium campestre Xanthium canadense Xanthium cavanillesii Xanthium californicum var. rotundifolium Xanthium cenchroides Xanthium commune Xanthium echinatum Xanthium glanduliferum Xanthium italicum Xanthium macounii Xanthium oligacanthum Xanthium oviforme Xanthium pensylvanicum Xanthium saccharatum Xanthium speciosum Xanthium strumarium ssp. italicum Xanthium strumarium var. oviforme Xanthium strumarium var. pensylvanicum Xanthium varians Xanthocephalum xanthocephalum Xanthocephalum gymnospermoides San Pedro matchweed Grindelia gymnospermoides Gutierrezia gymnospermoides Xylorhiza woodyaster Xylorhiza tortifolia Mojave woodyaster Xylorhiza tortifolia var. imberbis imberis woodyaster Machaeranthera tortifolia var. imberbis Xylorhiza tortifolia var. tortifolia Mojave woodyaster Aplopappus tortifolius Aster abatus Aster goodingii Aster mohavensis Aster tortifolius Machaeranthera tortifolia Xylorhiza lanceolata Xylorhiza scopulorum Yabea yabea Yabea microcarpa false carrot Caucalis microcarpa Yucca yucca Yucca angustissima narrowleaf yucca Yucca angustissima var. angustissima narrowleaf yucca Yucca angustissima var. avia Yucca angustissima var. kanabensis Kanab yucca Yucca kanabensis Yucca baccata banana yucca Yucca baccata var. baccata banana yucca Yucca baccata var. brevifolia Spanish dagger Yucca arizonica Yucca brevifolia Yucca confinis Yucca thornberi Yucca treleasei Yucca baccata var. vespertina banana yucca Yucca vespertina Yucca baileyi Navajo yucca Yucca baileyi var. baileyi Navajo yucca Yucca standleyi Yucca baileyi var. navajoa Navajo yucca Yucca navajoa Yucca brevifolia Joshua tree Yucca brevifolia var. brevifolia Joshua tree Clistoyucca brevifolia Yucca brevifolia var. herbertii Yucca brevifolia var. jaegeriana Jaeger's Joshua tree Yucca elata soaptree yucca Yucca elata var. elata soaptree yucca Yucca angustissima var. elata Yucca elata var. utahensis Utah yucca Yucca utahensis Yucca elata var. verdiensis Verdi yucca Yucca verdiensis Yucca harrimaniae Spanish bayonet Yucca harrimaniae var. harrimaniae Spanish bayonet Yucca gilbertiana Yucca harrimaniae var. gilbertiana Yucca xkarlsruhensis [filamentosa x glauca] Yucca schidigera Mojave yucca Yucca californica Yucca macrocarpa Yucca mohavensis Yucca schottii Schott's yucca Yucca macrocarpa Yucca puberula Yucca whipplei chaparral yucca Yucca whipplei var. caespitosa chaparral yucca Yucca whipplei ssp. caespitosa Yucca whipplei var. whipplei chaparral yucca Hesperoyucca whipplei Yucca californica Yucca graminifolia Yucca newberryi Yucca nitida Yucca whipplei var. graminifolia Yucca whipplei ssp. intermedia Yucca whipplei var. intermedia Yucca whipplei ssp. parishii Yucca whipplei ssp. percursa Yucca whipplei var. parishii Yucca whipplei var. percursa Zannichellia horned pondweed Zannichellia palustris horned pondweed Zannichellia major Zannichellia palustris var. major Zannichellia palustris var. stenophylla Zephyranthes zephyrlily Zephyranthes longifolia copper zephyrlily Atamosco longifolia Zigadenus deathcamas Zigadenus elegans mountain deathcamas Zigadenus elegans ssp. elegans mountain deathcamas Anticlea elegans Zigadenus alpinus Zigadenus paniculatus foothill deathcamas Helonias paniculatus Toxicoscordion paniculatum Zigadenus virescens green deathcamas Helonias virescens Zinnia zinnia Zinnia acerosa desert zinnia Zinnia pumila Zinnia grandiflora Rocky Mountain zinnia Crassina grandiflora Zinnia peruviana Peruvian zinnia Crassina multiflora Zinnia multiflora Zinnia pauciflora Zizania wildrice Zizania palustris northern wildrice Zizania palustris var. palustris northern wildrice Zizania aquatica var. angustifolia Zizania aquatica ssp. angustifolia Ziziphus jujube Ziziphus obtusifolia lotebush Ziziphus obtusifolia var. canescens lotebush Condalia lycioides var. canescens Condaliopsis lycioides var. canescens Ziziphus obtusifolia var. obtusifolia lotebush Condalia lycioides Condaliopsis lycioides Condalia obtusifolia Zornia zornia Zornia gemella dos hoja zazabacoa de dos hojas Hedysarum gemellum pro syn. Zornia diphylla Zornia leptophylla horsekiller Zornia diphylla var. leptophylla Zuckia zuckia Zuckia brandegeei siltbush Zuckia brandegeei var. arizonica Arizona siltbush Zuckia arizonica Zuckia brandegeei var. brandegeei siltbush Atriplex brandegeei Grayia brandegeei