Plant Common Names Starting With ‘S’
- Sacahuista
- Sacahuista Beargrass
- Sacahuista, Palmilla
- Sacahuiste
- Sacred Thorn-apple
- Saddlebush, Rio Grande
- Sage, Saw-tooth
- Sage, Sawtooth
- Sage, Scarlet
- Saguaro
- Sahara Mustard
- Sahuaro
- Salt Cedar
- Saltbush, Four-wing
- Saltbush, Fourwing
- Saltcedar
- Samota
- San Felipe Dogweed
- San Felipe Dyssodia
- Sand Dock
- Sand Fringepod
- Sand Lacepod
- Sand Wash Groundsel
- Sand-dune Wallflower
- Sandbells
- Sandbur, Mexican
- Sandbur, Texas
- Sanddune Wallflower
- Sandmat, Chiricahua Mountain
- Sandmat, Hyssopleaf
- Sandmat, Smallseed
- Sandmat, Yuma
- Sandpaper Bush
- Sangre de Cristo
- Santa Catalina Mountain Phlox
- Santa Catalina Prairie Clover
- Santa Rita Prickly Pear
- Santa Rita Pricklypear
- Sanvitalia, Abert's
- Saw-tooth Sage
- Sawtooth Sage
- Scalloped Phacelia
- Scarlet Beeblossom
- Scarlet Cinquefoil
- Scarlet Gaura
- Scarlet Hedge Nettle
- Scarlet Hedgehog Cactus
- Scarlet Hedgenettle
- Scarlet Lobelia
- Scarlet Lupine
- Scarlet Monkeyflower
- Scarlet Pimpernel
- Scarlet Sage
- Scarlet Spiderling
- Scarlet-bugler, Arizona
- Scarthgrass
- Schott's Agave
- Schott's Century Plant
- Scorpion-weed, Arizona
- Scorpion-weed, Distant
- Scorpion-weed, Limestone
- Scorpion-weed, Notch-leaf
- Scorpionweed
- Scorpionweed, Arizona
- Scorpionweed, Limestone
- Scouler Catchfly
- Scouler's Campion
- Scouler's Catchfly
- Scouring Horsetail
- Scouring Rush, Common
- Scouring-rush
- Scouring-rush, Tall
- Scouringrush Horsetail
- Scouringrush, Western
- Scrambled Eggs
- Scruffy Prairie Clover
- Scurf Pea
- Scurf Pea, Slender
- Scurf-pea, Few-flowered
- Scurfpea, Slimflower
- Scurfpea, Wedgeleaf
- Scurfy Pea
- Scurfy Prairie Clover
- Seaside Petunia
- Sedum, Cockerell's
- Seedticks
- Seep Monkeyflower
- Seep-willow
- Seepwillow
- Senna, Desert
- Senna, Shrubby
- Senna, Slim-pod
- Senna, Wislizenus'
- Senna, Woolly
- Sessile Water-speedwell
- Shadscale
- Shaggy Dwarf Morning-glory
- Shaggy Evolvulus
- Sharp-leaf Ground Cherry
- Sharpleaf Groundcherry
- Shepherd's Purse
- Shindagger
- Shrubby Cassia
- Shrubby Coldenia
- Shrubby Copperleaf
- Shrubby Deervetch
- Shrubby Indian Mallow
- Shrubby Purslane
- Shrubby Senna
- Sida, Bladderpod
- Sida, Procumbent
- Sida, Prostrate
- Sida, Spreading
- Sida, Tuberous
- Sierra Woolly Indian Paintbrush
- Silene, Sleepy
- Silky Evolvulus
- Silver Lake Daisy
- Silver Puffs
- Silver Wild Morningglory
- Silverleaf Bahia
- Silverleaf Nightshade
- Silverpuffs, Lindley's
- Simple Campion
- Simple Catchfly
- Siphonoglossa
- Skunk Bush
- Skunkbush Sumac
- Sleepy Campion
- Sleepy Catchfly
- Sleepy Silene
- Slender Dayflower
- Slender Gaillardia
- Slender Janusia
- Slender Poreleaf
- Slender Ragweed
- Slender Scurf Pea
- Slender-pod Jewelflower
- Slim-pod Senna
- Slimflower Scurfpea
- Slimleaf Bursage
- Slimleaf Plains Mustard
- Slimleaf Plainsmustard
- Small Groundcherry
- Small Matweed
- Small-flowered Eucrypta
- Small-flowered Mallow
- Small-seed Nolina
- Smallflower Nightshade
- Smallflowered Gaura
- Smallflowered Morning Glory
- Smallseed Sandmat
- Smartweed, Pennsylvania
- Smooth Desert Dandelion
- Smooth Desertdandelion
- Smooth Threadleaf Ragwort
- Smooththroat Stoneseed
- Snake-cotton, Arizona
- Snakecotton, Arizona
- Snakeweed, Late
- Snapdragon Vine
- Snapdragon, Climbing
- Snapdragon, Violet Twining
- Soapberry, Western
- Soapberry, Wingleaf
- Soaptree Yucca
- Sonoran Beardtongue
- Sonoran Bursage
- Sonoran Globe Amaranth
- Sorrel Buckwheat
- Sotol
- Sotol, Common
- Southwestern Barrel Cactus
- Southwestern Carrot
- Southwestern Coral Bean
- Southwestern Cosmos
- Southwestern Dwarf-mistletoe
- Southwestern Mock Vervain
- Southwestern Penstemon
- Southwestern Pipevine
- Southwestern Pricklypoppy
- Sow Thistle
- Sow Thistle, Prickly
- Sow-thistle, Common
- Sow-thistle, Rough
- Sow-thistle, Spiny-leaf
- Sowthistle, Annual
- Sowthistle, Common
- Sowthistle, Spiny
- Spectacle Fruit
- Speedwell, Water
- Spider Antelope-horns
- Spider Milkweed
- Spiderling, Bush
- Spiderling, Red
- Spiderling, Scarlet
- Spiderwort, Pine
- Spiderwort, Pinewoods
- Spiderwort, Prairie
- Spiderwort, Western
- Spine Aster, Tanseyleaf
- Spiny Cliff Brake
- Spiny Cliffbrake
- Spiny Hackberry
- Spiny Sowthistle
- Spiny-leaf Sow-thistle
- Spinyleaf Zinnia
- Spinystar
- Spiralseed, Harlequin
- Spotted Knapweed
- Spreading Fanpetals
- Spreading Fleabane
- Spreading Sida
- Springparsley, Arizona
- Springparsley, Purplenerve
- Spurge, Hyssop
- Spurge, Sun
- Spurge, Yuma
- Spurred Anoda
- Staghorn Cholla
- Standley's Cloak Fern
- Stanly Club Cholla
- Stansbury Cliffrose
- Stansbury's Cliffrose
- Star Cloak Fern
- Star-thistle, Maltese
- Starpoint
- Starthistle, Malta
- Stemless Primrose
- Steve's Dustymaiden
- Stickleaf, Adonis
- Stickleaf, Jones
- Stickleaf, Mountain
- Stickseed, Flatspine
- Stickseed, White
- Sticktight, Western
- Stickywilly
- Stiff Blue-eyed Grass
- Stiffarm Rock Cress
- Stink Gourd
- Stinking Gourd
- Stinking Passionflower
- Stinky Gourd
- Stock, Evening
- Stock, Evening Scented
- Stock, Night Scented
- Stonecrop, Cockerell's
- Stoneseed, Smooththroat
- Stork's Bill, Redstem
- Stork's Bill, Texas
- Stork's-Bill, Desert
- Straggler Daisy
- Strict Beardtongue
- Strigose Bird's-foot Trefoil
- Succulent Lupine
- Sugar Maple, Western
- Sumac, African
- Sumac, Skunkbush
- Summer Cilantro
- Summer Snow
- Sun Spurge
- Suncup, California
- Sunflower, Common
- Sunflower, Petioled
- Sunflower, Plains
- Sunflower, Prairie
- Sunflower, Wild
- Sweet Clover, Annual Yellow
- Sweet Clover, White
- Sweet Clover, Yellow
- Sweet Four O'Clock
- Sweetbush
- Sweetclover, Annual Yellow
- Sweetclover, White
- Sweetclover, Yellow
- Sycamore, Arizona
