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 Cro