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2785 Plants Found

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Scientific Name	Common Name	†	Map‡
Corydalis aurea Willd.	scrambled eggs
Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi	Scratchgrass
Lysimachia maritima (L.) Galasso, Banfi & Soldano	Sea Milkwort
Agrostis pallens Trin.	Seashore Bentgrass
Triglochin maritima L.	Seaside Arrowgrass
Hordeum marinum Huds.	seaside barley
Mimulus guttatus DC.	Seep Monkeyflower
Calochortus nuttallii Torr. & A. Gray	Sego Lily
Viola selkirkii Pursh ex Goldie	Selkirk's violet
Senega officinalis Spach	Seneca Snakeroot
Onoclea sensibilis L.	Sensitive Fern
Sagittaria rigida Pursh	sessilefruit arrowhead
Atriplex confertifolia (Torr. & Frém.) S. Watson	Shadscale Saltbush
Evolvulus nuttallianus Schult.	shaggy dwarf morning-glory
Erigeron pumilus Nutt.	shaggy fleabane
Gypsophila acutifolia Stev. ex Spreng.	Sharpleaf Baby's-Breath
Ranunculus acriformis A. Gray	sharpleaf buttercup
Physaria acutifolia Rydb.	sharpleaf twinpod
Valeriana acutiloba Rydb.	sharpleaf valerian
Mimulus alatus Aiton	sharpwing monkeyflower
Carex straminiformis L.H. Bailey	Shasta Sedge
Stuckenia vaginata (Turcz.) Holub	Sheathed Pondweed
Carex vaginata Tausch	sheathed sedge
Musineon vaginatum Rydb.	Sheathed Wildparsley
Potentilla ovina Macoun ex J.M. Macoun	sheep cinquefoil
Carex illota L.H. Bailey	sheep sedge
Capsella bursa-pastoris (L.) Medik.	shepherd's purse
Salix lucida Muhl.	Shining Willow
Cotoneaster lucidus Schltdl.	shiny cotoneaster
Spiraea lucida Douglas ex Greene	shinyleaf spirea
Poa abbreviata R. Br.	short bluegrass
Psilocarphus brevissimus Nutt.	short woollyheads
Symphyotrichum frondosum (Nutt.) G.L. Nesom	short-rayed alkali aster
Astragalus shortianus Nutt.	Short's Milkvetch
Borodinia dentata (Raf.) P.J.Alexander & Windham	Short's Rockcress
Alopecurus aequalis Sobol.	Shortawn Foxtail
Sagittaria brevirostra Mack. & Bush	shortbeak arrowhead
Carex brevior (Dewey) Mack.	shortbeak sedge
Hesperostipa curtiseta (Hitchc.) Barkworth	shortbristle needle and thread
Salix brachycarpa Nutt.	Shortfruit Willow
Carex fuliginosa Schkuhr	Shortleaved Sedge
Erigeron lonchophyllus Hook.	Shortray Fleabane
Elatine brachysperma A. Gray	shortseed waterwort
Myriophyllum sibiricum Kom.	shortspike watermilfoil
Tetradymia spinosa Hook. & Arn.	Shortspine Horsebrush
Cerastium brachypodum (Engelm. ex A. Gray) B.L. Rob.	shortstalk chickweed
Carex podocarpa R. Br.	shortstalk sedge
Eriogonum brevicaule Nutt.	Shortstem Buckwheat
Allium brevistylum S. Watson	Shortstyle Onion
Shoshonea pulvinata Evert & Constance	Shoshone Carrot
Senecio amplectens A. Gray	Showy Alpine Ragwort
Heliomeris multiflora Nutt.	showy goldeneye
Oxytropis splendens Douglas ex Hook.	showy locoweed
Asclepias speciosa Torr.	showy milkweed
Phlox speciosa Pursh	showy phlox
Antennaria pulcherrima (Hook.) Greene	showy pussytoes
Carex spectabilis Dewey	showy sedge
Desmodium canadense (L.) DC.	showy ticktrefoil
Dasiphora fruticosa (L.) Rydb.	Shrubby Cinquefoil
Epilobium suffruticosum Nutt.	shrubby willowherb
Erysimum inconspicuum (S. Watson) MacMill.	Shy Wallflower
Carex borealipolaris S.R.Zhang	Siberian Bog Sedge
Ulmus pumila L.	Siberian Elm
Caragana arborescens Lam.	Siberian Peashrub
Agropyron fragile (Roth) P. Candargy	Siberian Wheatgrass
Boechera sparsiflora (Nutt.) Dorn	Sicklepod Rockcress
Pedicularis racemosa Douglas ex Benth.	Sickletop Lousewort
Falcaria vulgaris Bernh.	sickleweed
Bouteloua curtipendula (Michx.) Torr.	Side-oats Grama
Penstemon secundiflorus Benth.	Sidebells Penstemon
Orthilia secunda (L.) House	sidebells wintergreen
Asclepias lanuginosa Nutt.	sidecluster milkweed
Carex leporinella Mack.	Sierra hare sedge
Juncus nevadensis S. Watson	Sierra Rush
Primula jeffreyi (Van Houtte) A.R.Mast & Reveal	Sierra Shootingstar
Symphyotrichum sericeum (Vent.) G.L. Nesom	silky aster
Cornus obliqua Raf.	silky dogwood
Lupinus sericeus Pursh	silky lupine
Astragalus sericoleucus A. Gray	Silky Milkvetch
Phacelia sericea (Graham) A. Gray	silky phacelia
Dalea villosa (Nutt.) Spreng.	silky prairie clover
Sophora nuttalliana B.L. Turner	silky sophora
Elymus villosus Muhl. ex Willd.	Silky Wild Rye
Shepherdia argentea (Pursh) Nutt.	Silver Buffaloberry
Potentilla argentea L.	silver cinquefoil
Acer saccharinum L.	Silver Maple	✓
Artemisia cana Pursh	silver sagebrush
Elaeagnus commutata Bernh. ex Rydb.	silverberry
Pediomelum argophyllum (Pursh) J. Grimes	silverleaf Indian breadroot
Astragalus argophyllus Nutt.	Silverleaf Milkvetch
Solanum elaeagnifolium Cav.	Silverleaf Nightshade
Phacelia hastata Douglas ex Lehm.	Silverleaf Phacelia
Atriplex argentea Nutt.	silverscale saltbush
Argentina anserina (L.) Rydb.	Silverweed Cinquefoil
Lupinus argenteus Pursh	Silvery Lupine
Primula incana M.E. Jones	silvery primrose
Carex canescens L.	silvery sedge
Allium simillimum L.F. Hend.	Simil Onion
Carex simpliciuscula Wahlenb.	Simple Bog Sedge
Silene scouleri Hook.	Simple Campion
Moneses uniflora (L.) A. Gray	Single Delight
Ericameria suffruticosa (Nutt.) G.L. Nesom	Singlehead Goldenbush
Eriogonum acaule Nutt.	Singlestem Buckwheat
Lycopodium sitchense Rupr.	Sitka Clubmoss
Valeriana sitchensis Bong.	Sitka valerian
Euphorbia hexagona Nutt. ex Spreng.	sixangle spurge
Vulpia octoflora (Walter) Rydb.	sixweeks fescue
Bouteloua barbata Lag.	sixweeks grama
Ambrosia tomentosa Nutt.	Skeletonleaf Bur Ragweed
Veronica scutellata L.	Skullcap Speedwell
Rhus trilobata Nutt.	Skunkbush Sumac
Silene antirrhina L.	sleepy silene
Eriocoma robusta (Vasey) Romasch.	Sleepygrass
Platanthera stricta Lindl.	slender bog orchid
Eriogonum microthecum Nutt.	Slender Buckwheat
Schoenoplectus heterochaetus (Chase) Soják	slender bulrush
Potentilla gracilis Douglas ex Hook.	slender cinquefoil
Eriophorum gracile W.D.J. Koch	slender cottongrass
Gnaphalium exilifolium A. Nelson	Slender Cudweed
Draba albertina Greene	Slender Draba
Fimbristylis autumnalis (L.) Roem. & Schult.	slender fimbry
Cyperus bipartitus Torr.	slender flatsedge
Deschampsia elongata (Hook.) Munro	Slender Hairgrass
Crepis atribarba A. Heller	Slender Hawksbeard
Astragalus gracilis Nutt.	slender milkvetch
Eremogone capillaris (Poir.) Fenzl	Slender Mountain Sandwort
Avena barbata Pott ex Link	slender oat
Microsteris gracilis (Hook.) Greene	slender phlox
Arabis pycnocarpa M.Hopkins	Slender Rock Cress
Salsola collina Pall.	slender Russian thistle
Froelichia gracilis (Hook.) Moq.	Slender Snakecotton
Eleocharis tenuis (Willd.) Schult.	slender spikerush
Sphenopholis intermedia (Rydb.) Rydb.	slender wedgescale
Elymus trachycaulus (Link) Gould ex Shinners	Slender Wheatgrass
Musineon tenuifolium Nutt.	Slender Wildparsley
Lithophragma tenellum Nutt.	Slender Woodland-Star
Oxalis dillenii Jacq.	Slender Yellow Woodsorrel
Piperia unalascensis (Spreng.) Rydb.	slender-spire orchid
Carex athrostachya Olney	Slenderbeak Sedge
Epilobium leptocarpum Hausskn.	slenderfruit willowherb
Agalinis tenuifolia (Vahl) Raf.	Slenderleaf False Foxglove
Drosera linearis Goldie	slenderleaf sundew
Strophostyles leiosperma (Torr. & A. Gray) Piper	Slickseed Fuzzybean
Amaranthus hybridus L.	Slim Amaranth
Pediomelum tenuiflorum (Pursh) A.N.Egan	Slimflower Scurfpea
Asclepias stenophylla A. Gray	Slimleaf Milkweed
Dichanthelium linearifolium (Scribn. ex Nash) Gould	slimleaf panicgrass
Triodanis leptocarpa (Nutt.) Nieuwl.	slimpod Venus' looking-glass
Euphorbia stictospora Engelm.	Slimseed Sandmat
Aristida longespica Poir.	slimspike threeawn
Muhlenbergia filiculmis Vasey	slimstem muhly
Calamagrostis stricta (Timm) Koeler	slimstem reedgrass
Ulmus rubra Muhl.	Slippery Elm
Senecio lugens Richardson	small blacktip ragwort
Mertensia longiflora Greene	small bluebells
Anchusa arvensis (L.) M. Bieb.	small bugloss
Camassia quamash (Pursh) Greene	small camas
Circaea alpina L.	Small Enchanter's Nightshade
Eremothera minor (A.Nelson) W.L.Wagner & Hoch	Small Evening Primrose
Glyceria borealis (Nash) Batchelder	small floating mannagrass
Geranium pusillum L.	Small Geranium
Potamogeton pusillus L.	small pondweed
Scutellaria parvula Michx.	Small Skullcap
Sisymbrium loeselii L.	small tumbleweed mustard
Viola macloskeyi Lloyd	small white violet
Ranunculus abortivus L.	Small-Flowered Buttercup
Angelica pinnata S. Watson	Small-Leaf Angelica
Antennaria parvifolia Nutt.	small-leaf pussytoes
Aquilegia brevistyla Hook.	Smallflower Columbine
Festuca minutiflora Rydb.	Smallflower Fescue
Corydalis micrantha (Engelm. ex A. Gray) A. Gray	smallflower fumewort
Gymnosteris parvula A. Heller	Smallflower Gymnosteris
Lipocarpha micrantha (Vahl) G. Tucker	smallflower halfchaff sedge
Mitella stauropetala Piper	smallflower miterwort
Nemophila parviflora Douglas ex Benth.	smallflower nemophila
Tripterocalyx micranthus (Torr.) Hook.	Smallflower Sandverbena
Lithophragma parviflorum (Hook.) Nutt. ex Torr. & A. Gray	smallflower woodland-star
Anemone parviflora Michx.	smallflowered anemone
Luzula parviflora (Ehrh.) Desv.	Smallflowered Woodrush
Arnica gracilis Rydb.	smallhead arnica
Boehmeria cylindrica (L.) Sw.	Smallspike False Nettle	✓
Carex microptera Mack.	smallwing sedge
Cuscuta polygonorum Engelm.	smartweed dodder
Melica smithii (Porter ex A. Gray) Vasey	Smith's melicgrass
Symphyotrichum laeve (L.) Á. Löve & D. Löve	Smooth Blue Aster
Pellaea glabella Mett. ex Kuhn	smooth cliffbrake
Digitaria ischaemum (Schreb.) Schreb. ex Muhl.	Smooth Crabgrass
Chenopodium subglabrum (S. Watson) A. Nelson	smooth goosefoot
Crepis capillaris (L.) Wallr.	Smooth Hawksbeard
Equisetum laevigatum A. Braun	smooth horsetail
Vernonia fasciculata Michx.	Smooth Ironweed
Delphinium glaucescens Rydb.	Smooth Larkspur
Rosa blanda Aiton	Smooth Rose
Polygonatum biflorum (Walter) Elliott	Smooth Solomon's Seal
Rhus glabra L.	Smooth Sumac
Xylorhiza glabriuscula Nutt.	Smooth Woody-Aster
Carex laeviconica Dewey	smoothcone sedge
Mentzelia laevicaulis (Hook.) Torr. & A. Gray	Smoothstem Blazingstar
Carex laeviculmis Meinsh.	smoothstem sedge
Elymus wawawaiensis J. Carlson & Barkworth	Snake River wheatgrass
Achillea ptarmica L.	Sneezeweed
Potentilla nivea L.	Snow Cinquefoil
Castilleja nivea Pennell & Ownbey	Snow Indian Paintbrush
Euphorbia marginata Pursh	Snow On The Mountain
Salix nivalis Hook.	snow willow
Cerastium tomentosum L.	Snow-In-Summer
Abronia fragrans Nutt. ex Hook.	Snowball Sand Verbena
Draba crassifolia Graham	snowbed draba
Ceanothus velutinus Douglas ex Hook.	Snowbrush Ceanothus
Cymopterus nivalis S. Watson	Snowline Springparsley
Pyrola minor L.	snowline wintergreen
Yucca glauca Nutt.	soapweed yucca
Symphyotrichum molle (Rydb.) G.L. Nesom	Soft Aster
Bromus hordeaceus L.	Soft Brome
Carex disperma Dewey	Softleaf Sedge
Schoenoplectus tabernaemontani (C.C. Gmel.) Palla	softstem bulrush
Sorghum bicolor (L.) Moench	Sorghum
Linum australe A. Heller	southern flax
Echinops ritro L.	southern globethistle
Najas guadalupensis (Spreng.) Magnus	southern waternymph
Artemisia abrotanum L.	southernwood
Carex bella L.H. Bailey	Southwestern Showy Sedge
Elatine rubella Rydb.	southwestern waterwort
Malacothrix sonchoides (Nutt.) Torr. & A. Gray	sowthistle desertdandelion
Cypripedium passerinum Richardson	sparrowegg lady's slipper
Atriplex patula L.	spear saltbush
Arnica longifolia D.C. Eaton	spearleaf arnica
Lorandersonia linifolia (Greene) Urbatsch, R.P.Roberts & Neubig	Spearleaf Rabbitbrush
Sedum lanceolatum Torr.	spearleaf stonecrop
Mentha spicata L.	Spearmint
Nothocalais nigrescens (L.F. Hend.) A. Heller	speckled false dandelion
Agrostis exarata Trin.	spike bentgrass
Festuca kingii (S.Watson) Cassidy	Spike Fescue
Carex nardina Fr.	spike sedge
Trisetum spicatum (L.) K. Richt.	Spike Trisetum
Ipomopsis spicata (Nutt.) V.E. Grant	Spiked Ipomopsis
Muhlenbergia glomerata (Willd.) Trin.	Spiked Muhly
Luzula spicata (L.) DC.	spiked woodrush
Avenula hookeri (Scribn.) Holub	spikeoat
Tetradymia canescens DC.	spineless horsebrush
Dryopteris carthusiana (Vill.) H.P. Fuchs	spinulose woodfern
Xanthium spinosum L.	spiny cocklebur
Grayia spinosa (Hook.) Moq.	spiny hopsage
Astragalus kentrophyta A. Gray	Spiny Milkvetch
Najas marina L.	spiny naiad
Phlox hoodii Richardson	spiny phlox
Carduus acanthoides L.	spiny plumeless thistle
Sonchus asper (L.) Hill	Spiny Sowthistle
Escobaria vivipara (Nutt.) Buxbaum	spinystar
Ruppia cirrhosa (Petagna) Grande	spiral ditchgrass
Potamogeton spirillus Tuck.	spiral pondweed
Packera dimorphophylla (Greene) W.A. Weber & Á. Löve	Splitleaf Groundsel
Castilleja rhexiifolia Rydb.	splitleaf Indian paintbrush
Galeopsis bifida Boenn.	splitlip hempnettle
Corallorhiza maculata (Raf.) Raf.	Spotted Coralroot
Fritillaria atropurpurea Nutt.	spotted fritillary
Geranium maculatum L.	Spotted Geranium
Eutrochium maculatum (L.) E.E. Lamont	Spotted Joe Pye Weed	✓
Centaurea stoebe L.	spotted knapweed
Persicaria maculosa Gray	Spotted Ladysthumb
Medicago arabica (L.) Huds.	spotted medick
Euphorbia maculata L.	Spotted Spurge
Hackelia patens (Nutt.) I.M. Johnst.	Spotted Stickseed
Cicuta maculata L.	Spotted Water Hemlock
Thermopsis rhombifolia var. divaricarpa (A.Nelson) Isely	Spreadfruit Goldenbanner
Eriogonum effusum Nutt.	Spreading Buckwheat
Apocynum androsaemifolium L.	Spreading Dogbane
Erigeron divergens Torr. & A. Gray	spreading fleabane
Gayophytum diffusum Torr. & A. Gray	Spreading Groundsmoke
Paronychia depressa (Torr. & A. Gray) Nutt. ex A. Nelson	Spreading Nailwort
Phlox diffusa Benth.	spreading phlox
Loeflingia squarrosa Nutt.	spreading pygmyleaf
Erysimum repandum L.	spreading wallflower
Elymus scribneri (Vasey) M.E. Jones	spreading wheatgrass
Dryopteris expansa (C. Presl) Fraser-Jenkins & Jermy	spreading woodfern
Rorippa sinuata (Nutt.) Hitchc.	spreading yellowcress
Boechera divaricarpa (A.Nelson) Á.Löve & D.Löve	Spreadingpod Rockcress
Carex sprengelii Dewey ex Spreng.	Sprengel's sedge
Corallorhiza wisteriana Conrad	spring coralroot
Draba verna L.	spring draba
Myosotis verna Nutt.	spring forget-me-not
Veronica verna L.	spring speedwell
Impatiens ecornuta Gerry Moore, Zika & Rushworth	Spurless Touch-me-not
Euphorbia exstipulata Engelm.	squareseed spurge
Centaurea virgata Lam.	squarrose knapweed
Viburnum edule (Michx.) Raf.	Squashberry
Elymus elymoides (Raf.) Swezey	Squirreltail
Rhus typhina L.	Staghorn Sumac	✓
Collomia tinctoria Kellogg	staining collomia
Oxytropis podocarpa A. Gray	Stalkpod Locoweed
Ipomopsis rubra (L.) Wherry	Standing-Cypress
Chenopodium standleyanum Aellen	Standley's Goosefoot
Lemna trisulca L.	Star Duckweed
Carex echinata Murray	Star Sedge
Maianthemum stellatum (L.) Link	Starry False Lily of the Valley
Lupinus caespitosus Nutt.	Stemless Dwarf Lupine
Tetraneuris acaulis (Pursh) Greene	stemless four-nerve daisy
Stenotus acaulis (Nutt.) Nutt.	Stemless Mock Goldenweed
Townsendia exscapa (Richardson) Porter	stemless Townsend daisy
Agoseris parviflora (Nutt.) D.Dietr.	Steppe Agoseris
Ribes viscosissimum Pursh	sticky currant
Aliciella pinnatifida (Nutt. ex A. Gray) J.M. Porter	Sticky Gilia
Arnica ovata Greene	Sticky Leaf Arnica
Cerastium glomeratum Thuill.	Sticky Mouse-Ear Chickweed
Polemonium viscosum Nutt.	Sticky Polemonium
Geranium viscosissimum Fisch. & C.A. Mey. ex C.A. Mey.	sticky purple geranium
Galium aparine L.	stickywilly
Lycopodium annotinum L.	Stiff Clubmoss
Solidago rigida L.	Stiff Goldenrod
Thelesperma filifolium (Hook.) A. Gray	stiff greenthread
Galium tinctorium (L.) Scop.	Stiff Marsh Bedstraw
Helianthus pauciflorus Nutt.	Stiff Sunflower
Castilleja lutescens (Greenm.) Rydb.	stiff yellow Indian paintbrush
Solidago rigidiuscula (Torr. & A.Gray) Porter	Stiff-leaved Showy Goldenrod
Heterotheca stenophylla (A. Gray) Shinners	stiffleaf false goldenaster
Penstemon aridus Rydb.	Stiffleaf Penstemon
Linum rigidum Pursh	Stiffstem Flax
Eragrostis cilianensis (All.) Vign. ex Janchen	stinkgrass
Anthemis cotula L.	stinking chamomile
Ranunculus orthorhynchus Hook.	straightbeak buttercup
Juncus orthophyllus Coville	straightleaf rush
Salix ligulifolia (C.R. Ball) C.R. Ball ex C.K. Schneid.	Strapleaf Willow
Cyperus strigosus L.	Straw-Colored Flatsedge	✓
Trifolium fragiferum L.	strawberry clover
Epipactis gigantea Douglas ex Hook.	stream orchid
Iliamna rivularis (Douglas ex Hook.) Greene	Streambank Wild Hollyhock
Erigeron glabellus Nutt.	streamside fleabane
Myosotis stricta Link ex Roem. & Schult.	strict forget-me-not
Eurybia merita (A. Nelson) G.L. Nesom	subalpine aster
Abies lasiocarpa (Hook.) Nutt.	Subalpine Fir
Grindelia subalpina Greene	Subalpine Gumweed
Larix lyallii Parl.	subalpine larch
Pediomelum hypogaeum (Nutt. ex Torr. & A. Gray) Rydb.	subterranean Indian breadroot
Trifolium dubium Sibth.	Suckling Clover
Ranunculus suksdorfii A. Gray	Suksdorf's buttercup
Crataegus gaylussacia A.Heller	Suksdorf's Hawthorn
Mimulus suksdorfii A. Gray	Suksdorf's monkeyflower
Ranunculus sulphureus Sol. ex C.J. Phipps	Sulphur Buttercup
Potentilla recta L.	sulphur cinquefoil
Penstemon attenuatus Douglas ex Lindl.	Sulphur Penstemon
Eriogonum umbellatum Torr.	sulphur-flower buckwheat
Astragalus hyalinus M.E. Jones	Summer Milkvetch
Adonis aestivalis L.	summer pheasant's eye
Phemeranthus parviflorus (Nutt.) Kiger	sunbright
Wyethia helianthoides Nutt.	Sunflower Mule-Ears
Ranunculus pedatifidus Sm.	surefoot buttercup
Pedicularis lanceolata Michx.	Swamp Lousewort
Asclepias incarnata L.	Swamp Milkweed
Persicaria hydropiperoides (Michx.) Small	Swamp Smartweed
Schoenoplectus subterminalis (Torr.) Soják	swaying bulrush
Lobularia maritima (L.) Desv.	sweet alyssum
Foeniculum vulgare Mill.	sweet fennel
Artemisia annua L.	sweet sagewort
Viola odorata L.	sweet violet
Cinna arundinacea L.	Sweet Wood Reed	✓
Lonicera caerulea L.	Sweetberry Honeysuckle
Rosa rubiginosa L.	sweetbriar rose
Osmorhiza berteroi DC.	sweetcicely
Androsace chamaejasme Wulfen	Sweetflower Rockjasmine
Dianthus barbatus L.	sweetwilliam
Panicum virgatum L.	Switchgrass
Lemna gibba L.	swollen duckweed
Townsendia spathulata Nutt.	Sword Townsend Daisy
Juncus ensifolius Wikstr.	Swordleaf Rush
Zygophyllum fabago L.	Syrian beancaper
Euclidium syriacum (L.) W.T. Aiton	Syrian mustard
Ranunculus ranunculinus (Nutt.) Rydb.	Tadpole Buttercup
Carex tahoensis Smiley	Tahoe sedge
Lupinus caudatus Kellogg	tailcup lupine
Epilobium brachycarpum C. Presl	Tall Annual Willowherb
Lactuca biennis (Moench) Fernald	Tall Blue Lettuce
Mertensia paniculata (Aiton) G. Don	Tall Bluebells
Ranunculus acris L.	tall buttercup
Drymocallis arguta Pursh	Tall Cinquefoil
Eriophorum angustifolium Honck.	tall cottongrass
Draba praealta Greene	tall draba
Agalinis aspera (Douglas ex Benth.) Britton	tall false foxglove
Lolium arundinaceum (Schreb.) Darbysh.	Tall Fescue
Doellingeria umbellata (Mill.) Nees	Tall Flat-topped White Aster
Mertensia ciliata (James ex Torr.) G. Don	tall fringed bluebells
Solidago altissima L.	Tall Goldenrod
Senecio hydrophiloides Rydb.	tall groundsel
Agrimonia gryposepala Wallr.	tall hairy agrimony
Ipomoea purpurea (L.) Roth	tall morning-glory
Delphinium scaposum Greene	tall mountain larkspur
Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl	Tall Oatgrass
Senecio serra Hook.	tall ragwort
Anemone virginiana L.	Tall Thimbleweed
Cirsium altissimum (L.) Hill	tall thistle
Graphephorum canescens (Buckley) Röser & Tkach	Tall Trisetum
Sisymbrium altissimum L.	tall tumblemustard
Thinopyrum ponticum (Podp.) Z.-W. Liu & R.-C. Wang	tall wheatgrass
Epilobium clavatum Trel.	talus willowherb
Machaeranthera tanacetifolia (Kunth) Nees	Tanseyleaf Tansyaster
Potentilla bipinnatifida Douglas ex Hook.	tansy cinquefoil
Taraxia tanacetifolia (Torr. & A.Gray) Piper	Tansyleaf Evening Primrose
Dichanthelium acuminatum (Sw.) Gould & C.A. Clark	Tapered Rosette Grass
Cyperus acuminatus Torr. & Hook. ex Torr.	tapertip flatsedge
Crepis acuminata Nutt.	Tapertip Hawksbeard
Erigeron radicatus Hook.	Taproot Fleabane
Artemisia dracunculus L.	tarragon
Amsinckia lycopsoides Lehm.	Tarweed Fiddleneck
Brickellia grandiflora (Hook.) Nutt.	tasselflower brickellbush
Lonicera tatarica L.	Tatarian Honeysuckle
Eragrostis hypnoides "(Lam.) Britton	teal lovegrass
Eragrostis tef (Zuccagni) Trotter	Teff
Mentzelia decapetala (Pursh ex Sims) Urb. & Gilg ex Gilg	tenpetal blazingstar
Bergia texana (Hook.) Seub. ex Walp.	Texas bergia
Croton texensis (Klotzsch) Müll. Arg.	Texas Croton
Euthamia gymnospermoides Greene	Texas goldentop
Nuttallanthus texanus (Scheele) D.A. Sutton	Texas Toadflax
Allium textile A. Nelson & J.F. Macbr.	Textile Onion
Thesium arvense Horv.	thesium
Carex macloviana d'Urv.	Thickhead Sedge
Draba crassa Rydb.	Thickleaf Draba
Senecio crassulus A. Gray	thickleaf ragwort
Elymus lanceolatus (Scribn. & J.G. Sm.) Gould	thickspike wheatgrass
Eurybia integrifolia (Nutt.) G.L. Nesom	thickstem aster
Rubus parviflorus Nutt.	thimbleberry
Paspalum setaceum Michx.	thin paspalum
Eriophorum viridicarinatum (Engelm.) Fernald	thinleaf cottonsedge
Vaccinium membranaceum Douglas ex Torr.	Thinleaf Huckleberry
Orthocarpus tenuifolius (Pursh) Benth.	thinleaved owl's-clover
Erythranthe hymenophylla (Meinke) G.L.Nesom	Thinsepal Monkeyflower
Pleiacanthus spinosus (Nutt.) Rydb.	Thorn Skeletonweed
Juncus filiformis L.	thread rush
Ranunculus trichophyllus Chaix	threadleaf crowfoot
Phacelia linearis (Pursh) Holz.	threadleaf phacelia
Carex filifolia Nutt.	threadleaf sedge
Juncus triglumis L.	Three-hulled Rush
Dulichium arundinaceum (L.) Britton	three-way sedge
Tiarella trifoliata L.	threeleaf foamflower
Lewisia triphylla (S. Watson) B.L. Rob.	threeleaf lewisia
Bidens tripartita L.	Threelobe Beggarticks
Erigeron subtrinervis Rydb. ex Porter & Britton	threenerve fleabane
Solidago velutina DC.	Threenerve Goldenrod
Galium trifidum L.	threepetal bedstraw
Artemisia tripartita Rydb.	threetip sagebrush
Packera thurberi (A.Gray) B.L.Turner	Threetooth Ragwort
Stenotus armerioides Nutt.	thrift mock goldenweed
Eriocoma thurberiana (Piper) Romasch.	Thurber's Needlegrass
Dracocephalum thymiflorum L.	Thymeleaf Dragonhead
Euphorbia serpillifolia Pers.	Thymeleaf Sandmat
Arenaria serpyllifolia L.	thymeleaf sandwort
Artemisia tilesii Ledeb.	Tilesius' wormwood
Mimulus tilingii Regel	Tiling's Monkeyflower
Astragalus miser Douglas ex Hook.	timber milkvetch
Danthonia intermedia Vasey	timber oatgrass
Phleum pratense L.	Timothy
Myosurus minimus L.	Tiny Mousetail
Collomia linearis Nutt.	Tiny Trumpet
Juncus bufonius L.	toad rush
Valeriana edulis Nutt. ex Torr. & A. Gray	Tobacco Root
Orthocarpus tolmiei Hook. & Arn.	Tolmie's Owl's-Clover
Cryptantha torreyana (A. Gray) Greene	Torrey's cryptantha
Malacothrix torreyi A. Gray	Torrey's Desertdandelion
Tetraneuris torreyana (Nutt.) Greene	Torrey's Four-Nerve Daisy
Juncus torreyi Coville	Torrey's rush
Carex torreyi Tuck.	Torrey's sedge
Turritis glabra L.	Tower Rockcress
Erigeron flagellaris A. Gray	trailing fleabane
Allionia incarnata L.	trailing windmills
Pyrrocoma clementis Rydb.	Tranquil Goldenweed
Ailanthus altissima (Mill.) Swingle	Tree of Heaven
Atriplex prostrata Bouchér ex DC.	triangle orache
Botrychium ascendens W.H. Wagner	trianglelobe moonwort
Carex molesta Mack. ex Bright	troublesome sedge
Myosotis scorpioides L.	true forget-me-not
Lathyrus tuberosus L.	tuberous sweetpea
Saxifraga caespitosa L.	tufted alpine saxifrage
Oenothera caespitosa Nutt.	Tufted Evening Primrose
Erigeron caespitosus Nutt.	tufted fleabane
Deschampsia cespitosa (L.) P. Beauv.	Tufted Hairgrass
Lysimachia thyrsiflora L.	tufted loosestrife
Eragrostis pectinacea (Michx.) Nees ex Steud.	tufted lovegrass
Astragalus spatulatus Sheldon	tufted milkvetch
Juncus brachyphyllus Wiegand	Tuftedstem Rush
Opuntia phaeacantha Engelm.	tulip pricklypear
Chloris verticillata Nutt.	Tumble Windmill Grass
Schedonnardus paniculatus (Nutt.) Trel.	tumblegrass
Atriplex rosea L.	Tumbling Saltweed
Oreostemma alpigenum (Torr. & A. Gray) Greene	tundra aster
Ranunculus eschscholtzii var. eximius (Greene) L.D.Benson	Tundra Buttercup
Lemna turionifera Landolt	turion duckweed
Cymopterus terebinthinus (Hook.) Torr. & A.Gray	Turpentine Wavewing
Erigeron tweedyi Canby	Tweedy's Fleabane
Gilia tweedyi Rydb.	Tweedy's Gila
Plantago tweedyi A. Gray	Tweedy's Plantain
Salix tweedyi (Bebb ex Rose) C.R. Ball	Tweedy's willow
Arnica sororia Greene	twin arnica
Lonicera involucrata (Richardson) Banks ex Spreng.	twinberry honeysuckle
Linnaea borealis L.	twinflower
Cherleria obtusiloba (Rydb.) A.J.Moore & Dillenb.	Twinflower Sandwort
Galium bifolium S. Watson	twinleaf bedstraw
Opuntia macrorhiza Engelm.	twistspine pricklypear
Juncus biglumis L.	Twoflowered Rush
Astragalus bisulcatus (Hook.) A. Gray	twogrooved milkvetch
Callitriche heterophylla Pursh	twoheaded water-starwort
Penstemon diphyllus Rydb.	Twoleaf Beardtongue
Elodea bifoliata H. St. John	twoleaf waterweed

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