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2820 Plants Found

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Ordered by common name.

Scientific Name	Common Name	†	Map‡
Carex duriuscula C.A. Mey.	needleleaf sedge
Juncus scirpoides Lam.	needlepod rush
Desmanthus reticulatus Benth.	netleaf bundleflower
Celtis reticulata	Netleaf Hackberry
Matelea reticulata (Engelm. ex A. Gray) Woodson	netted milkvine
Tragia urticifolia Michx.	nettleleaf noseburn
Symphyotrichum novae-angliae (L.) G.L. Nesom	New England Aster	✓
Ceanothus americanus L.	New Jersey tea
Hesperostipa neomexicana (Thurb. ex J.M. Coult.) Barkworth	New Mexico feathergrass
Argythamnia neomexicana Müll. Arg.	New Mexico silverbush
Vernonia noveboracensis (L.) Michx.	New York Ironweed
Matthiola longipetala (Vent.) DC.	Night Scented Stock
Silene noctiflora L.	nightflowering silene
Muhlenbergia schreberi J.F. Gmel.	Nimblewill
Dalea enneandra Nutt.	nineanther prairie clover
Enneapogon desvauxii Desv. ex P. Beauv.	nineawn pappusgrass
Hypericum drummondii (Grev. & Hook.) Torr. & A. Gray	nits and lice
Penstemon laxiflorus Pennell	Nodding Beardtongue
Bidens cernua L.	Nodding Beggartick
Cerastium nutans Raf.	nodding chickweed
Festuca subverticillata (Pers.) Alexeev	nodding fescue
Spiranthes cernua (L.) Rich.	nodding lady's tresses
Muhlenbergia bushii Pohl	Nodding Muhly
Allium cernuum Roth	Nodding Onion
Carduus nutans L.	nodding plumeless thistle
Najas flexilis (Willd.) Rostk. & Schmidt	Nodding Waternymph
Symphyotrichum boreale (Torr. & A. Gray) Á. Löve & D. Löve	northern bog aster
Viola nephrophylla Greene	northern bog violet
Lycopus uniflorus Michx.	Northern Bugleweed
Catalpa speciosa (Warder) Warder ex Engelm.	Northern Catalpa
Rubus flagellaris Willd.	Northern Dewberry
Platanthera aquilonis Sheviak	northern green orchid
Juncus alpinoarticulatus Chaix	northern green rush
Lomatium orientale J.M. Coult. & Rose	Northern Idaho biscuitroot
Adiantum pedatum L.	Northern Maidenhair Fern
Quercus rubra L.	Northern Red Oak	✓
Chasmanthium latifolium (Michx.) Yates	Northern Sea Oats
Selaginella rupestris (L.) Spring	northern selaginella
Spiranthes lacera (Raf.) Raf.	Northern Slender Lady's Tresses
Lindera benzoin (L.) Blume	Northern Spicebush	✓
Alisma triviale Pursh	Northern Water Plantain
Callitriche hermaphroditica L.	northern water-starwort
Wolffia borealis (Engelm. ex Hegelm.) Landolt ex Landolt & Wildi	northern watermeal
Zizania palustris L.	Northern Wildrice
Carex utriculata Boott	Northwest Territory sedge
Potentilla norvegica L.	Norwegian cinquefoil
Distimake dissectus (Jacq.) A.R.Simões & Staples	Noyau Vine
Puccinellia nuttalliana (Schult.) Hitchc.	Nuttall's Alkaligrass
Toxicoscordion nuttallii (A.Gray) Rydb.	Nuttall's Deathcamas
Oenothera nuttallii Sweet	Nuttall's Evening Primrose
Nemastylis nuttallii Pickering ex R.C. Foster	Nuttall's Pleatleaf
Blitum nuttallianum Schult.	Nuttall's Povertyweed
Polytaenia nuttallii DC.	Nuttall's Prairie Parsley
Mimosa nuttallii (DC. ex Britton & Rose) B.L. Turner	Nuttall's sensitive-briar
Helianthus nuttallii Torr. & A. Gray	Nuttall's Sunflower
Viola nuttallii Pursh	Nuttall's violet
Echinocereus viridiflorus Engelm.	nylon hedgehog cactus
Phoradendron leucarpum (Raf.) Reveal & M.C. Johnst.	Oak Mistletoe
Datura quercifolia Kunth	Oak-Leaved Thorn-Apple
Physostegia virginiana (L.) Benth.	obedient plant
Diarrhena obovata (Gleason) Brandenburg	Obovate Beakgrain
Fouquieria splendens Engelm.	Ocotillo
Spiranthes ovalis Lindl.	October lady's tresses
Aesculus glabra Willd.	Ohio Buckeye
Penstemon oklahomensis Pennell	Oklahoma Beardtongue
Rubus oklahomus L.H. Bailey	Oklahoma Blackberry
Phlox oklahomensis Wherry	Oklahoma Phlox
Prunus gracilis Engelm. & A. Gray	Oklahoma plum
Carex oklahomensis Mack.	Oklahoma Sedge
Rubus alumnus L.H. Bailey	oldfield blackberry
Matelea decipiens (Alexander) Woodson	Oldfield Milkvine
Hymenopappus artemisiifolius DC.	oldplainsman
Cyperus retroflexus Buckley	oneflower flatsedge
Bouteloua uniflora Vasey	oneflower grama
Orobanche uniflora L.	oneflowered broomrape
Nasturtium microphyllum Boenn. ex Rchb.	onerow yellowcress
Sicyos angulatus L.	Oneseed Bur Cucumber
Juniperus monosperma (Engelm.) Sarg.	Oneseed Juniper
Dichanthelium laxiflorum (Lam.) Gould	openflower rosette grass
Papaver somniferum L.	opium poppy
Picradeniopsis oppositifolia (Nutt.) Rydb. ex Britton	oppositeleaf bahia
Rudbeckia fulgida Aiton	Orange Coneflower
Hemerocallis fulva (L.) L.	orange daylily
Phemeranthus aurantiacus (Engelm.) Kiger	orange fameflower
Dactylis glomerata L.	Orchard Grass
Woodsia oregana D.C. Eaton	Oregon cliff fern
Delphinium wootonii Rydb.	Organ Mountain larkspur
Platycladus orientalis (L.) Franco	Oriental Arborvitae
Consolida orientalis (J. Gay) Schroedinger	Oriental Knight's-Spur
Lespedeza thunbergii subsp. formosa (Vogel) H.Ohashi	Oriental Lespedeza
Agalinis densiflora (Benth.) S.F. Blake	Osage False Foxglove
Maclura pomifera (Raf.) C.K. Schneid.	Osage-orange	✓
Matteuccia struthiopteris (L.) Todaro	Ostrich Fern
Palafoxia sphacelata (Nutt. ex Torr.) Cory	othake
Carex cephalophora Muhl. ex Willd.	Oval-Headed Sedge
Hemionitis ovata (Desv.) Christenh.	Ovateleaf Cliffbrake
Quercus lyrata Walter	Overcup Oak	✓
Leucanthemum vulgare Lam.	oxeye daisy
Limnodea arkansana (Nutt.) L.H. Dewey	Ozark grass
Astragalus distortus Torr. & A. Gray	Ozark milkvetch
Astragalus ceramicus Sheldon	painted milkvetch
Rumex altissimus Alph. Wood	pale dock
Oenothera pallida Lindl.	pale evening primrose
Chamaesaracha pallida Averett	pale five eyes
Arnoglossum atriplicifolium (L.) H. Rob.	Pale Indian Plantain
Clematis versicolor Small ex Rydb.	Pale Leather Flower
Lobelia appendiculata A. DC.	Pale Lobelia
Alyssum alyssoides (L.) L.	pale madwort
Echinacea pallida (Nutt.) Nutt.	Pale Purple Coneflower
Persicaria lapathifolia (L.) Delarbre	Pale Smartweed
Impatiens pallida Nutt.	Pale Touch-Me-Not
Helianthus strumosus L.	paleleaf woodland sunflower
Lobelia spicata Lam.	Palespike Lobelia
Dimorphocarpa candicans (Raf.) Rollins	Palmer's spectaclepod
Pediomelum digitatum (Nutt. ex Torr. & A. Gray) Isely	palmleaf Indian breadroot
Callirhoe pedata (Nutt. ex Hook.) A. Gray	Palmleaf Poppymallow
Desmodium paniculatum (L.) DC.	panicledleaf ticktrefoil
Broussonetia papyrifera (L.) L'Hér. ex Vent.	Paper Mulberry
Malus pumila Mill.	paradise apple
Carex umbellata Schkuhr ex Willd.	Parasol Sedge
Doellingeria umbellata (Mill.) Nees	parasol whitetop
Eleocharis parishii Britton	Parish's spikerush
Antennaria parlinii Fernald	Parlin's pussytoes
Myriophyllum aquaticum (Vell.) Verdc.	Parrot Feather Watermilfoil
Crataegus marshallii Eggl.	parsley hawthorn
Chamaecrista fasciculata (Michx.) Greene	Partridge Pea	✓
Heliotropium tenellum (Nutt.) Torr.	pasture heliotrope
Asimina triloba (L.) Dunal	Pawpaw
Prunus persica (L.) Batsch	Peach
Salix amygdaloides Andersson	peachleaf willow
Arachis hypogaea L.	peanut
Crataegus calpodendron (Ehrh.) Medik.	pear hawthorn
Carya illinoinensis (Wangenh.) K. Koch	Pecan
Carex peckii Howe	Peck's sedge
Cardamine pensylvanica Muhl. ex Willd.	Pennsylvania bittercress
Rubus pensilvanicus Poir.	Pennsylvania Blackberry
Ranunculus pensylvanicus L. f.	Pennsylvania buttercup
Potentilla pensylvanica L.	Pennsylvania cinquefoil
Gamochaeta pensylvanica (Willd.) Cabrera	Pennsylvania everlasting
Parietaria pensylvanica Muhl. ex Willd.	Pennsylvania Pellitory
Carex pensylvanica Lam.	Pennsylvania sedge
Polygonum pensylvanicum L.	Pennsylvania Smartweed
Iva asperifolia Less.	Pensacola marsh elder
Mentha ×piperita	Peppermint
Nekemias arborea (L.) J. Wen & Boggan	Peppervine
Lathyrus latifolius L.	perennial pea
Lolium perenne L.	Perennial Ryegrass
Gaillardia suavis (A. Gray & Engelm.) Britton & Rusby	perfumeballs
Desmodium perplexum B.G. Schub.	perplexed ticktrefoil
Albizia julibrissin Durazz.	Persian Silktree
Cuscuta obtusiflora Kunth	Peruvian dodder
Selaginella peruviana (Milde) Hieron.	Peruvian spikemoss
Erigeron philadelphicus L.	Philadelphia Fleabane
Panicum philadelphicum Bernh. ex Trin.	Philadelphia panicgrass
Heliotropium convolvulaceum (Nutt.) A. Gray	phlox heliotrope
Cryptantha texana (A. DC.) Greene	Pick Me Nots
Pontederia cordata L.	Pickerelweed
Stylisma pickeringii (Torr. ex M.A. Curtis) A. Gray	Pickering's dawnflower
Cruciata pedemontana (Bellardi) Ehrend.	piedmont bedstraw
Quercus palustris Münchh.	Pin Oak	✓
Juniperus pinchotii Sudw.	Pinchot Juniper
Cyperus retrorsus Chapm.	Pine Barren Flatsedge
Coryphantha sulcata (Engelm.) Britton & Rose	pineapple cactus
Acalypha ostryifolia Riddell	Pineland Threeseed Mercury
Oenothera speciosa Nutt.	Pink Evening Primrose
Tridens congestus (L.H. Dewey) Nash	pink fluffgrass
Strophostyles umbellata (Muhl. ex Willd.) Britton	pink fuzzybean
Glandularia pumila (Rydb.) Umber	pink mock vervain
Pappophorum bicolor Fourn.	pink pappusgrass
Fleischmannia incarnata (Walter) R.M. King & H. Rob.	pink thoroughwort
Dalea tenuis (J.M. Coult.) Shinners	pinkglobe prairie clover
Echinocereus enneacanthus Engelm.	pitaya
Mononeuria patula (Michx.) Dillenb. & Kadereit	Pitcher's Stitchwort
Chenopodium berlandieri Moq.	Pitseed Goosefoot
Oenothera patriciae W.L. Wagner & Hoch	Plains Beeblossom
Melampodium leucanthum Torr. & A. Gray	plains blackfoot
Aphanostephus ramosissimus DC.	plains dozedaisy
Erigeron modestus A. Gray	plains fleabane
Vernonia marginata (Torr.) Raf.	plains ironweed
Eragrostis intermedia Hitchc.	plains lovegrass
Astragalus gilviflorus Sheldon	plains milkvetch
Asclepias pumila (A. Gray) Vail	plains milkweed
Muhlenbergia cuspidata (Torr. ex Hook.) Rydb.	plains muhly
Allium perdulce S.V. Fraser	plains onion
Opuntia polyacantha Haw.	plains pricklypear
Ammoselinum popei Torr. & A. Gray	plains sandparsley
Froelichia floridana (Nutt.) Moq.	plains snakecotton
Yucca campestris McKelvey	Plains Yucca
Argythamnia simulans J.W. Ingram	plateau silverbush
Tradescantia edwardsiana Tharp	Plateau Spiderwort
Astragalus plattensis Nutt.	Platte River milkvetch
Polygonum tenue Michx.	pleatleaf knotweed
Phlox cuspidata Scheele	pointed phlox
Conium maculatum L.	Poison Hemlock	✓
Suckleya suckleyana (Torr.) Rydb.	poison suckleya
Dyschoriste linearis (Torr. & A. Gray) Kuntze	polkadots
Punica granatum L.	pomegranate
Pinus ponderosa Lawson & C. Lawson	Ponderosa Pine
Monarda pectinata Nutt.	pony beebalm
Diodia teres Walter	Poorjoe
Atriplex holocarpa F. Muell.	Pop Saltbush
Phacelia popei Torr. & A. Gray	Pope's phacelia
Hesperostipa spartea (Trin.) Barkworth	Porcupinegrass
Chamaecyparis lawsoniana (A. Murray bis) Parl.	Port Orford Cedar
Melica porteri Scribn.	Porter's melicgrass
Ilex decidua Walter	Possumhaw
Quercus stellata Wangenh.	Post Oak	✓
Krigia dandelion (L.) Nutt.	potato dwarfdandelion
Bromus sterilis L.	poverty brome
Sporobolus vaginiflorus (Torr. ex A. Gray) Alph. Wood	poverty dropseed
Danthonia spicata (L.) P. Beauv. ex Roem. & Schult.	Poverty Oatgrass
Juncus tenuis Willd.	poverty rush
Aristida divaricata Humb. & Bonpl. ex Willd.	poverty threeawn
Iva axillaris Pursh	povertyweed
Thalia dealbata Fraser ex Roscoe	powdery alligator-flag
Hemionitis artax Christenh.	Powdery False Cloak Fern
Amaranthus powellii S. Watson	Powell's Amaranth
Acaciella angustissima (Mill.) Britton & Rose	Prairie Acacia
Oenothera triangulata (Buckley) W.L. Wagner & Hoch	Prairie Beeblossom
Liatris pycnostachya Michx.	Prairie Blazing Star
Sisyrinchium campestre E.P. Bicknell	prairie blue-eyed grass
Warnockia scutellarioides (Engelm. & A. Gray) M.W. Turner	prairie brazosmint
Amphiachyris dracunculoides (DC.) Nutt.	Prairie Broomweed
Sanguisorba annua (Nutt. ex Hook.) Nutt. ex Torr. & A. Gray	Prairie Burnet
Camassia angusta (Engelm. & A. Gray) Blank.	Prairie Camas
Spartina pectinata Bosc ex Link	Prairie Cordgrass
Malus ioensis (Alph. Wood) Britton	Prairie Crab Apple
Eriochloa contracta Hitchc.	Prairie Cupgrass
Sporobolus heterolepis (A. Gray) A. Gray	Prairie Dropseed
Nothocalais cuspidata (Pursh) Greene	prairie false dandelion
Agalinis heterophylla (Nutt.) Small ex Britton	prairie false foxglove
Trisetum interruptum Buckley	prairie false oat
Baccharis texana (Torr. & A. Gray) A. Gray	prairie false willow
Phemeranthus rugospermus (Holz.) Kiger	Prairie Fameflower
Erigeron strigosus Muhl. ex Willd.	Prairie Fleabane
Physalis pumila var. hispida (Waterf.) J.R.Sullivan	Prairie Groundcherry
Packera plattensis (Nutt.) W.A. Weber & Á. Löve	prairie groundsel
Koeleria macrantha (Ledeb.) Schult.	Prairie Junegrass
Cooperia pedunculata Herb.	prairie lily
Matelea cynanchoides (Engelm.) Woodson	prairie milkvine
Asclepias sullivantii Engelm. ex A. Gray	Prairie Milkweed
Penstemon cobaea Nutt.	Prairie Penstemon
Phacelia strictiflora (Engelm. & A. Gray) A. Gray	prairie phacelia
Spigelia hedyotidea A. DC.	prairie pinkroot
Lechea stricta Leggett ex Britton	prairie pinweed
Nemastylis geminiflora Nutt.	Prairie Pleatleaf
Rosa arkansana Porter	prairie rose
Calamovilfa longifolia (Hook.) Scribn.	Prairie Sandreed
Carex prairea Dewey ex Alph. Wood	prairie sedge
Rhynchosia latifolia Nutt. ex Torr. & A. Gray	prairie snoutbean
Tradescantia occidentalis (Britton) Smyth	Prairie Spiderwort
Rhus lanceolata (A. Gray) Britton	prairie sumac
Helianthus petiolaris Nutt.	Prairie Sunflower
Croton monanthogynus Michx.	Prairie Tea
Thermopsis rhombifolia (Nutt. ex Pursh) Nutt. ex Richardson	prairie thermopsis
Cirsium canescens Nutt.	prairie thistle
Aristida oligantha Michx.	Prairie Threeawn
Triodanis lamprosperma McVaugh	prairie Venus' looking-glass
Glandularia bipinnatifida (Nutt.) Nutt.	Prairie Verbena
Viola pedatifida G. Don	prairie violet
Sphenopholis obtusata (Michx.) Scribn.	Prairie Wedgescale
Salix humilis Marshall	Prairie Willow
Helenium elegans DC.	pretty sneezeweed
Sida spinosa L.	Prickly Fanpetals
Lactuca serriola L.	Prickly Lettuce	✓
Salsola tragus L.	prickly Russian thistle
Thymophylla acerosa (DC.) Strother	pricklyleaf dogweed
Dodecatheon meadia L.	Pride of Ohio
Amaranthus hypochondriacus L.	Prince-of-Wales feather
Paulownia tomentosa (Thunb.) Siebold & Zucc. ex Steud.	Princess Tree
Polygala incarnata L.	procession flower
Galega officinalis L.	professor-weed
Panicum miliaceum L.	proso millet
Amaranthus albus L.	Prostrate Pigweed
Marshallia caespitosa Nutt. ex DC.	puffballs
Sporobolus neglectus Nash	puffsheath dropseed
Muhlenbergia filiformis (Thurb. ex S. Watson) Rydb.	pullup muhly
Tribulus terrestris L.	puncturevine
Pellaea atropurpurea (L.) Link	Purple Cliffbrake
Dalea lasiathera A. Gray	purple dalea
Lamium purpureum L.	Purple Deadnettle
Agalinis purpurea (L.) Pennell	Purple False Foxglove
Oxytropis lambertii Pursh	purple locoweed
Lythrum salicaria L.	Purple Loosestrife
Eragrostis spectabilis (Pursh) Steud.	purple lovegrass
Thalictrum dasycarpum Fisch. & Avé-Lall.	Purple Meadow-rue
Polygala sanguinea L.	purple milkwort
Cyperus rotundus L.	Purple Nutsedge
Passiflora incarnata L.	purple passionflower
Callirhoe involucrata (Torr. & A. Gray) A. Gray	Purple Poppy Mallow
Dalea purpurea Vent.	purple prairie clover
Iodanthus pinnatifidus (Michx.) Steud.	Purple Rocket
Triplasis purpurea (Walter) Chapm.	purple sandgrass
Eleocharis atropurpurea (Retz.) J. Presl & C. Presl	purple spikerush
Aristida purpurea Nutt.	Purple Threeawn
Helenium flexuosum Raf.	Purplehead Sneezeweed
Epilobium coloratum Biehler	purpleleaf willowherb
Tridens flavus (L.) Hitchc.	Purpletop
Verbena incompta P.W. Michael	purpletop vervain
Suaeda calceoliformis (Hook.) Moq.	Pursh Seepweed
Vicia minutiflora F.G. Dietr.	pygmyflower vetch
Elymus repens (L.) Gould	Quackgrass
Populus tremuloides Michx.	Quaking Aspen
Daucus carota L.	Queen Anne's lace
Stillingia sylvatica L.	queen's-delight
Hieracium gronovii L.	queendevil
Galinsoga quadriradiata Cav.	Quickweed
Pseudognaphalium obtusifolium (L.) Hilliard & B.L. Burtt	Rabbit-tobacco
Trifolium arvense L.	Rabbitfoot Clover
Proboscidea louisianica (Mill.) Thell.	Ram's Horn
Brassica napus L.	rape
Astragalus leptocarpus Torr. & A. Gray	rare loco milkvetch
Botrychium virginianum (L.) Sw.	Rattlesnake Fern
Eryngium yuccifolium Michx.	Rattlesnake Master
Dichanthelium ravenelii (Scribn. & Merr.) Gould	Ravenel's rosette grass
Carex crus-corvi Shuttlw. ex Kunze	ravenfoot sedge
Saccharum ravennae (L.) L.	ravennagrass
Symphyotrichum ciliatum (Ledeb.) G.L. Nesom	Rayless Alkali Aster
Amaranthus cruentus L.	red amaranth
Aesculus pavia L.	red buckeye
Aronia arbutifolia (L.) Pers.	Red Chokeberry
Trifolium pratense L.	Red Clover
Aquilegia canadensis L.	Red Columbine	✓
Gaillardia pinnatifida Torr.	Red Dome Blanketflower
Oxybasis rubra (L.) S.Fuentes, Uotila & Borsch	Red Goosefoot
Bouteloua trifida Thurb.	red grama
Eragrostis secundiflora J. Presl	Red Lovegrass
Acer rubrum L.	Red Maple	✓
Morus rubra L.	Red Mulberry
Spermolepis inermis (Nutt. ex DC.) Mathias & Constance	Red River scaleseed
Spergularia rubra (L.) J. Presl & C. Presl	Red Sandspurry
Salicornia rubra A. Nelson	red swampfire
Cornus sericea L.	Red-Osier Dogwood
Erythrina herbacea L.	redcardinal
Hesperaloe parviflora (Torr.) J.M. Coult.	Redflower False Yucca
Monarda russeliana Nutt. ex Sims	Redpurple Beebalm
Amaranthus retroflexus L.	redroot amaranth
Cyperus erythrorhizos Muhl.	redroot flatsedge
Plantago rhodosperma Decne.	redseed plantain
Ipomoea coccinea L.	Redstar
Erodium cicutarium (L.) L'Hér. ex Aiton	Redstem Stork's Bill	✓
Agrostis gigantea Roth	Redtop
Panicum rigidulum Bosc ex Nees	Redtop Panicgrass
Polanisia dodecandra (L.) DC.	redwhisker clammyweed
Plantago eriopoda Torr.	redwool plantain
Phalaris arundinacea L.	Reed Canary Grass
Carex retroflexa Muhl. ex Willd.	reflexed sedge
Bromus catharticus Vahl	rescuegrass
Pleopeltis polypodioides (L.) Andrews & Windham	resurrection fern
Mentzelia reverchonii (Urb. & Gilg) H.J. Thomp. & Zavort.	Reverchon's blazingstar
Setaria reverchonii (Vasey) Pilg.	Reverchon's bristlegrass
Hedeoma reverchonii (A. Gray) A. Gray	Reverchon's False Pennyroyal
Crataegus reverchonii Sarg.	Reverchon's Hawthorn
Eleocharis reverchonii Svens.	Reverchon's spikerush
Trifolium resupinatum L.	reversed clover
Chloris gayana Kunth	Rhodes grass
Acalypha rhomboidea Raf.	Rhomboid Mercury	✓
Symphyotrichum dumosum (L.) G.L. Nesom	Rice Button Aster
Leersia oryzoides (L.) Sw.	rice cutgrass
Cyperus iria L.	ricefield flatsedge
Heuchera richardsonii R. Br.	Richardson's Alumroot
Carex oligocarpa Schkuhr ex Willd.	richwoods sedge
Aphanostephus riddellii Torr. & A. Gray	Riddell's dozedaisy
Senecio riddellii Torr. & A. Gray	Riddell's ragwort
Linum striatum Walter	ridged yellow flax
Carex tetanica Schkuhr	rigid sedge
Muhlenbergia torreyi (Kunth) Hitchc. ex Bush	ring muhly
Juncus filipendulus Buckley	Ringseed Rush
Glandularia polyantha Umber	Rio Grande mock vervain
Bromus diandrus Roth	ripgut brome
Betula nigra L.	River Birch	✓
Orobanche riparia L.T. Collins	River Broomrape
Bolboschoenus fluviatilis (Torr.) Soják	River Bulrush
Vitis riparia Michx.	Riverbank Grape
Agrimonia striata Michx.	Roadside Agrimony
Sisyrinchium langloisii Greene	roadside blue-eyed grass
Berteroa mutabilis (Vent.) DC.	Roadside False Madwort
Erigeron pulchellus Michx.	Robin's Plantain	✓
Ranunculus micranthus Nutt.	Rock Buttercup
Ulmus thomasii Sarg.	Rock Elm
Linum rupestre (A. Gray) Engelm. ex A. Gray	rock flax
Pediomelum reverchonii (S. Watson) Rydb.	Rock Indian Breadroot
Muhlenbergia sobolifera (Muhl. ex Willd.) Trin.	rock muhly
Cleomella serrulata (Pursh) Roalson & J.C.Hall	Rocky Mountain Beeplant
Schoenoplectiella saximontana (Fernald) Lye	Rocky Mountain bulrush
Festuca saximontana Rydb.	Rocky Mountain fescue
Juniperus scopulorum Sarg.	Rocky Mountain Juniper
Carex saximontana Mack.	Rocky Mountain sedge
Zinnia grandiflora Nutt.	Rocky Mountain zinnia
Mimosa roemeriana Scheele	Roemer's mimosa
Euphorbia roemeriana Scheele	Roemer's spurge
Baccharis neglecta Britton	Rooseveltweed
Eleocharis radicans (A. Dietr.) Kunth	rooted spikerush
Cuscuta glomerata Choisy	rope dodder
Rubus rosa L.H. Bailey	rose blackberry
Houstonia rosea (Raf.) Terrell	rose bluet
Chaetopappa ericoides (Torr.) G.L. Nesom	rose heath
Glandularia canadensis (L.) Nutt.	Rose Mock Vervain
Sabatia angularis (L.) Pursh	Rosepink
Palafoxia rosea (Bush) Cory	rosy palafox
Carex rosea Schkuhr ex Willd.	rosy sedge
Rivina humilis L.	rougeplant
Geum laciniatum Murray	Rough Avens
Echinochloa muricata (P. Beauv.) Fernald	rough barnyardgrass
Agrostis scabra Willd.	Rough Bentgrass
Liatris aspera Michx.	rough blazing star
Bromus squarrosus L.	Rough Brome
Lycopus asper Greene	Rough Bugleweed
Xanthium strumarium L.	rough cocklebur
Rudbeckia grandiflora (D. Don) J.F. Gmel. ex DC.	Rough Coneflower
Sporobolus clandestinus (Biehler) Hitchc.	rough dropseed
Hedeoma hispida Pursh	Rough False Pennyroyal
Nabalus asper (Michx.) Torr. & A.Gray	Rough Rattlesnakeroot
Amaranthus tuberculatus (Moq.) Sauer	Roughfruit Amaranth
Cornus drummondii C.A. Mey.	roughleaf dogwood
Silphium radula Nutt.	roughstem rosinweed
Senegalia roemeriana (Scheele) Britton & Rose	roundflower catclaw
Gratiola virginiana L.	roundfruit hedgehyssop
Juncus compressus Jacq.	roundfruit rush
Lespedeza capitata Michx.	roundhead lespedeza
Dalea multiflora (Nutt.) Shinners	roundhead prairie clover
Juncus validus Coville	Roundhead Rush
Eriogonum rotundifolium Benth.	roundleaf buckwheat
Smilax rotundifolia L.	roundleaf greenbrier
Mimulus glabratus Kunth	roundleaf monkeyflower
Heteranthera rotundifolia (Kunth) Griseb.	roundleaf mudplantain
Packera obovata (Muhl. ex Willd.) W.A. Weber & Á. Löve	roundleaf ragwort
Gutierrezia sphaerocephala A. Gray	roundleaf snakeweed
Dichanthelium sphaerocarpon (Elliott) Gould	roundseed panicgrass
Hypericum sphaerocarpum Michx.	Roundseed St. Johnswort
Maurandella antirrhiniflora (Humb. & Bonpl. ex Willd.) Rothm.	roving sailor
Ericameria nauseosa (Pall. ex Pursh) G.L. Nesom & Baird	rubber rabbitbrush
Thalictrum thalictroides (L.) Eames & B. Boivin	Rue Anemone
Thamnosma texana (A. Gray) Torr.	rue of the mountains
Scirpus pendulus Muhl.	Rufous Bulrush
Erigeron tracyi Greene	Running Fleabane
Lygodesmia juncea (Pursh) D. Don ex Hook.	rush skeletonplant
Elaeagnus angustifolia L.	Russian Olive
Viburnum rufidulum Raf.	Rusty Blackhaw
Lupinus pusillus Pursh	rusty lupine
Bromus secalinus L.	rye brome
Nandina domestica Thunb.	sacred bamboo
Nelumbo nucifera Gaertn.	sacred lotus
Datura wrightii Regel	Sacred Thorn-Apple
Carthamus tinctorius L.	safflower
Viola vallicola A. Nelson	sagebrush violet
Stuckenia pectinata (L.) Börner	Sago Pondweed
Atriplex dioica Raf.	Saline Saltbush
Tragopogon porrifolius L.	salsify
Heliotropium curassavicum L.	salt heliotrope
Distichlis spicata (L.) Greene	Saltgrass
Halogeton glomeratus (M. Bieb.) C.A. Mey.	saltlover
Juncus gerardii Loisel.	Saltmeadow Rush
Yucca reverchonii Trel.	San Angelo yucca
Agalinis homalantha Pennell	San Antonio false foxglove
Lechea san-sabeana (Buckley) Hodgdon	San Saba pinweed
Cardamine parviflora L.	sand bittercress
Andropogon hallii Hack.	sand bluestem
Sporobolus cryptandrus (Torr.) A. Gray	sand dropseed
Vitis rupestris Scheele	sand grape
Eragrostis trichodes (Nutt.) Alph. Wood	Sand Lovegrass
Asclepias arenaria Torr.	sand milkweed
Muhlenbergia arenicola Buckley	sand muhly
Phacelia patuliflora (Engelm. & A. Gray) A. Gray	sand phacelia
Artemisia filifolia Torr.	sand sagebrush
Carex perdentata S.D. Jones	sand sedge
Eleocharis montevidensis Kunth	sand spikerush
Eragrostis frankii C.A. Mey. ex Steud.	Sandbar Lovegrass
Salix interior Rowlee	Sandbar Willow
Poa secunda J. Presl	Sandberg Bluegrass
Prunus pumila L.	Sandcherry
Erysimum capitatum (Douglas ex Hook.) Greene	Sanddune Wallflower
Amaranthus arenicola I.M. Johnst.	Sandhill Amaranth
Chenopodium cycloides A. Nelson	sandhill goosefoot
Muhlenbergia pungens Thurb.	sandhill muhly
Quercus vaseyana Buckley	sandpaper oak
Verbena scabra Vahl	sandpaper vervain
Parthenium hysterophorus L.	Santa Maria Feverfew
Carex sartwellii Dewey	Sartwell's sedge
Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem.	Saskatoon serviceberry
Sassafras albidum (Nutt.) Nees	Sassafras	✓
Phanopyrum gymnocarpon (Elliott) Nash	savannah-panicgrass
Smilax bona-nox L.	saw greenbrier
Rubus argutus Link	Sawtooth Blackberry
Helianthus grosseserratus M. Martens	Sawtooth Sunflower
Cuscuta gronovii Willd. ex Schult.	Scaldweed
Cuscuta squamata Engelm.	scaleflower dodder
Liatris squarrosa (L.) Michx.	Scaly Blazing Star
Oenothera suffrutescens (Moc. & Sessé ex Ser.) W.L.Wagner & Hoch	Scarlet Beeblossom
Pyracantha coccinea M. Roem.	scarlet firethorn
Ipomopsis aggregata (Pursh) V.E. Grant	scarlet gilia
Sphaeralcea coccinea (Nutt.) Rydb.	scarlet globemallow
Echinocereus coccineus Engelm.	scarlet hedgehog cactus
Castilleja coccinea (L.) Spreng.	Scarlet Indian Paintbrush
Boerhavia coccinea Mill.	scarlet spiderling
Cyperus schweinitzii Torr.	Schweinitz's flatsedge
Onopordum acanthium L.	Scotch cottonthistle
Pinus sylvestris L.	Scots Pine	✓
Equisetum hyemale L.	scouringrush horsetail
Corydalis aurea Willd.	scrambled eggs

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