Home » Search: All Plants in Arizona/New Mexico Plateau

3967 Plants Found

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Ordered by scientific name.

Scientific Name	Common Name	†	Map‡
Plectocephalus americanus (Nutt.) D.Don	American Star-thistle
Plectocephalus rothrockii (Greenm.) D.J.N.Hind	Rothrock's Knapweed
Plectritis ciliosa (Greene) Jeps.	longspur seablush
Pleiacanthus spinosus (Nutt.) Rydb.	Thorn Skeletonweed
Pleuraphis mutica Buckley	tobosagrass
Pleuraphis rigida Thurb.	big galleta
Pleurocoronis pluriseta (A. Gray) R.M. King & H. Rob.	bush arrowleaf
Pluchea odorata (L.) Cass.	sweetscent
Pluchea sericea (Nutt.) Coville	Arrowweed
Poa abbreviata R. Br.	short bluegrass
Poa alpina L.	Alpine Bluegrass
Poa annua L.	annual bluegrass
Poa arachnifera Torr.	Texas Bluegrass
Poa arctica R. Br.	arctic bluegrass
Poa arida Vasey	Plains Bluegrass
Poa bigelovii Vasey & Scribn.	Bigelow's bluegrass
Poa bulbosa L.	bulbous bluegrass
Poa compressa L.	Canada bluegrass
Poa cusickii Vasey	Cusick's Bluegrass
Poa fendleriana (Steud.) Vasey	muttongrass
Poa glauca Vahl	Glaucous Bluegrass
Poa leptocoma Trin.	marsh bluegrass
Poa occidentalis Vasey	New Mexico bluegrass
Poa palustris L.	Fowl Bluegrass
Poa reflexa Vasey & Scribn. ex Vasey	Nodding Bluegrass
Poa secunda J. Presl	Sandberg Bluegrass
Poa tracyi Vasey	Tracy's Bluegrass
Poa trivialis L.	Rough Bluegrass
Poa wheeleri Vasey	Wheeler's Bluegrass
Podistera eastwoodiae (J.M. Coult. & Rose) Mathias & Constance	Eastwood's Podistera
Polanisia dodecandra (L.) DC.	redwhisker clammyweed
Polanisia uniglandulosa (Cav.) DC.	Mexican clammyweed
Polemonium brandegeei (A. Gray) Greene	Brandegee's Jacob's-ladder
Polemonium confertum A. Gray	Rocky Mountain Jacob's-Ladder
Polemonium foliosissimum A. Gray	towering Jacob's-ladder
Polemonium occidentale Greene	western polemonium
Polemonium pulcherrimum Hook.	Jacob's-ladder
Polemonium viscosum Nutt.	Sticky Polemonium
Poliomintha incana (Torr.) A. Gray	frosted mint
Polygonatum biflorum (Walter) Elliott	smooth Solomon's seal
Polygonum argyrocoleon Steud. ex Kunze	silversheath knotweed
Polygonum douglasii Greene	Douglas' knotweed
Polygonum erectum L.	Erect Knotweed
Polygonum minimum S. Watson	broadleaf knotweed
Polygonum pensylvanicum L.	Pennsylvania Smartweed
Polygonum ramosissimum Michx.	Bushy Knotweed
Polypodium hesperium Maxon	western polypody
Polypodium saximontanum Windham	Rocky Mountain Polypody
Polypogon australis Brongn.	Chilean rabbitsfoot grass
Polypogon interruptus Kunth	ditch rabbitsfoot grass
Polypogon monspeliensis (L.) Desf.	annual rabbitsfoot grass
Polypogon viridis (Gouan) Breistr.	beardless rabbitsfoot grass
Polystichum lonchitis (L.) Roth	northern hollyfern
Polystichum scopulinum (D.C. Eaton) Maxon	Mountain Hollyfern
Pomaria jamesii (Torr. & A. Gray) Walp.	James' holdback
Pontederia crassipes Mart.	Common Water Hyacinth
Populus ×canadensis Moench	Carolina Poplar
Populus ×jackii	Balm-of-Gilead
Populus alba L.	White Poplar
Populus angustifolia James	Narrowleaf Cottonwood
Populus deltoides W. Bartram ex Marshall	Eastern Cottonwood
Populus fremontii S. Watson	Fremont Cottonwood
Populus nigra L.	Lombardy poplar
Populus tremuloides Michx.	Quaking Aspen
Porophyllum gracile Benth.	slender poreleaf
Porophyllum scoparium A. Gray	Trans-Pecos poreleaf
Porterella carnosula (Hook. & Arn.) Torr.	Fleshy Porterella
Portulaca halimoides L.	silkcotton purslane
Portulaca oleracea L.	Common Purslane
Portulaca pilosa L.	kiss me quick
Portulaca suffrutescens Engelm.	shrubby purslane
Portulaca umbraticola Kunth	wingpod purslane
Potamogeton alpinus Balbis	alpine pondweed
Potamogeton crispus L.	Curly Pondweed
Potamogeton diversifolius Raf.	waterthread pondweed
Potamogeton epihydrus Raf.	ribbonleaf pondweed
Potamogeton foliosus Raf.	Leafy Pondweed
Potamogeton gramineus L.	variableleaf pondweed
Potamogeton illinoensis Morong	Illinois Pondweed
Potamogeton natans L.	floating pondweed
Potamogeton nodosus Poir.	longleaf pondweed
Potamogeton praelongus Wulfen	whitestem pondweed
Potamogeton pusillus L.	small pondweed
Potamogeton richardsonii (Benn.) Rydb.	Richardson's pondweed
Potentilla ambigens Greene	Silkyleaf Cinquefoil
Potentilla biennis Greene	biennial cinquefoil
Potentilla bipinnatifida Douglas ex Hook.	tansy cinquefoil
Potentilla concinna Richardson	elegant cinquefoil
Potentilla crinita A. Gray	bearded cinquefoil
Potentilla effusa Douglas ex Lehm.	Branched Cinquefoil
Potentilla gracilis Douglas ex Hook.	slender cinquefoil
Potentilla hippiana Lehm.	Woolly Cinquefoil
Potentilla multifoliolata (Torr.) Kearney & Peebles	Manyleaf Mousetail
Potentilla nivea L.	Snow Cinquefoil
Potentilla norvegica L.	Rough Cinquefoil
Potentilla ovina Macoun ex J.M. Macoun	sheep cinquefoil
Potentilla pensylvanica L.	Pennsylvania cinquefoil
Potentilla plattensis Nutt.	Platte River cinquefoil
Potentilla pulcherrima Lehm.	beautiful cinquefoil
Potentilla recta L.	sulphur cinquefoil
Potentilla rivalis Nutt.	Brook Cinquefoil
Potentilla sabulosa M.E.Jones	Intermountain Mousetail
Potentilla subjuga Rydb.	Colorado Cinquefoil
Potentilla subviscosa Greene	Navajo cinquefoil
Potentilla supina L.	Paradox Cinquefoil
Potentilla thurberi A. Gray	Scarlet Cinquefoil
Prenanthella exigua (A. Gray) Rydb.	brightwhite
Primula angustifolia Torr.	Alpine Primrose
Primula latiloba (A.Gray) A.R.Mast & Reveal	White Shootingstar
Primula parryi A. Gray	Parry's Primrose
Primula pauciflora (Durand) A.R.Mast & Reveal	Darkthroat Shootingstar
Primula rusbyi Greene	Rusby's primrose
Primula specuicola Rydb.	Cavedwelling Primrose
Primula tetrandra (Suksd.) A.R.Mast & Reveal	Alpine Shootingstar
Proatriplex pleiantha (W.A. Weber) Stutz & G.L. Chu	Mancos Shadscale
Proboscidea althaeifolia (Benth.) Decne.	desert unicorn-plant
Proboscidea louisianica (Mill.) Thell.	Ram's Horn
Proboscidea parviflora (Wooton) Wooton & Standl.	Doubleclaw
Proboscidea sabulosa Correll	sanddune unicorn-plant
Prosartes trachycarpa S. Watson	roughfruit fairybells
Prosopis glandulosa Torr.	Honey Mesquite
Prosopis pubescens Benth.	screwbean mesquite
Prosopis velutina Wooton	velvet mesquite
Prunella vulgaris L.	Common Selfheal
Prunus americana Marshall	American Plum
Prunus armeniaca L.	apricot
Prunus avium (L.) L.	Sweet Cherry
Prunus cerasus L.	sour cherry
Prunus emarginata (Douglas ex Hook.) D. Dietr.	bitter cherry
Prunus fasciculata (Torr.) A. Gray	desert almond
Prunus pensylvanica L. f.	Pin Cherry
Prunus persica (L.) Batsch	Peach
Prunus serotina Ehrh.	Black Cherry	✓
Prunus virginiana L.	Chokecherry
Psacalium decompositum (A. Gray) H. Rob. & Brettell	desert Indianbush
Psathyrostachys juncea (Fisch.) Nevski	Russian wildrye
Psathyrotes annua (Nutt.) A. Gray	annual psathyrotes
Psathyrotes pilifera A. Gray	Hairybeast Turtleback
Psathyrotes ramosissima (Torr.) A. Gray	velvet turtleback
Pseudoclappia arenaria Rydb.	Trans-Pecos false clapdaisy
Pseudognaphalium arizonicum (A. Gray) Anderb.	Arizona cudweed
Pseudognaphalium canescens (DC.) W.A. Weber	Wright's cudweed
Pseudognaphalium jaliscense (Greenm.) Anderb.	Jalisco rabbit-tobacco
Pseudognaphalium leucocephalum (A. Gray) Anderb.	white cudweed
Pseudognaphalium macounii (Greene) Kartesz	Macoun's cudweed
Pseudognaphalium pringlei (A. Gray) Anderb.	Pringle's cudweed
Pseudognaphalium stramineum (Kunth) Anderb.	Cottonbatting Plant
Pseudoroegneria spicata (Pursh) Á. Löve	Bluebunch Wheatgrass
Pseudostellaria jamesiana (Torr.) W.A. Weber & R.L. Hartm.	tuber starwort
Pseudotsuga menziesii (Mirb.) Franco	Douglas Fir
Psilactis asteroides A. Gray	New Mexico tansyaster
Psilostrophe cooperi (A. Gray) Greene	whitestem paperflower
Psilostrophe sparsiflora (A. Gray) A. Nelson	Greenstem Paperflower
Psilostrophe tagetina (Nutt.) Greene	Woolly Paperflower
Psorothamnus arborescens (Torr. ex A. Gray) Barneby	Mojave indigobush
Psorothamnus fremontii (Torr. ex A. Gray) Barneby	Fremont's dalea
Psorothamnus scoparius (A. Gray) Rydb.	broom dalea
Psorothamnus spinosus (A. Gray) Barneby	smoketree
Psorothamnus thompsoniae (Vail) S.L. Welsh & N.D. Atwood	Thompson's Dalea
Ptelea trifoliata L.	Common Hoptree
Pteridium aquilinum (L.) Kuhn	western brackenfern
Pterospora andromedea Nutt.	woodland pinedrops
Pterostegia drymarioides Fisch. & C.A. Mey.	woodland pterostegia
Puccinellia distans (Jacq.) Parl.	weeping alkaligrass
Puccinellia fasciculata (Torr.) E.P. Bicknell	saltmarsh alkaligrass
Puccinellia nuttalliana (Schult.) Hitchc.	Nuttall's Alkaligrass
Puccinellia parishii Hitchc.	bog alkaligrass
Pulsatilla patens (L.) Mill.	eastern pasqueflower
Punica granatum L.	pomegranate
Purshia ×subintegra	Arizona Cliffrose
Purshia glandulosa Curran	desert bitterbrush
Purshia mexicana (D. Don) Henrickson	Mexican cliffrose
Purshia stansburiana (Torr.) Henrickson	Stansbury Cliffrose
Purshia tridentata (Pursh) DC.	Antelope Bitterbrush
Pyracantha coccinea M. Roem.	scarlet firethorn
Pyrola asarifolia Michx.	Liverleaf Wintergreen
Pyrola chlorantha Sw.	Greenflowered Wintergreen
Pyrola elliptica Nutt.	waxflower shinleaf
Pyrola minor L.	snowline wintergreen
Pyrola picta Sm.	whiteveined wintergreen
Pyrrhopappus pauciflorus (D. Don) DC.	smallflower desert-chicory
Pyrrocoma clementis Rydb.	Tranquil Goldenweed
Pyrrocoma crocea (A. Gray) Greene	Curlyhead Goldenweed
Pyrrocoma lanceolata (Hook.) Greene	lanceleaf goldenweed
Pyrrocoma uniflora (Hook.) Greene	Plantain Goldenweed
Pyrus communis L.	Common Pear
Quercus ×undulata Torr.	Wavyleaf Oak
Quercus ajoensis C.H. Mull.	Ajo Mountain scrub oak
Quercus arizonica Sarg.	Arizona white oak
Quercus chrysolepis Liebm.	Canyon Live Oak
Quercus emoryi Torr.	Emory oak
Quercus gambelii Nutt.	Gambel Oak
Quercus grisea Liebm.	Gray Oak
Quercus havardii Rydb.	Havard Oak
Quercus hypoleucoides A. Camus	silverleaf oak
Quercus palmeri Engelm.	Palmer oak
Quercus pungens Liebm.	pungent oak
Quercus rugosa Née	netleaf oak
Quercus turbinella Greene	Sonoran scrub oak
Quincula lobata (Torr.) Raf.	Chinese lantern
Rafinesquia californica Nutt.	California plumeseed
Rafinesquia neomexicana A. Gray	New Mexico plumeseed
Ranunculus abortivus L.	Small-Flowered Buttercup
Ranunculus acris L.	tall buttercup
Ranunculus alismifolius Geyer ex Benth.	plantainleaf buttercup
Ranunculus cardiophyllus Hook.	heartleaf buttercup
Ranunculus cymbalaria Pursh	Alkali Buttercup
Ranunculus egglestonii (Wooton & Standl.) Christenh. & Byng	Western Mousetail
Ranunculus eschscholtzii Schltdl.	Eschscholtz's Buttercup
Ranunculus eschscholtzii var. eximius (Greene) L.D.Benson	Tundra Buttercup
Ranunculus flammula L.	greater creeping spearwort
Ranunculus glaberrimus Hook.	sagebrush buttercup
Ranunculus gmelinii DC.	Gmelin's buttercup
Ranunculus hydrocharoides A. Gray	frogbit buttercup
Ranunculus hyperboreus Rottb.	High Northern Buttercup
Ranunculus inamoenus Greene	Graceful Buttercup
Ranunculus longirostris Godr.	Longbeak Buttercup
Ranunculus macauleyi A. Gray	Rocky Mountain Buttercup
Ranunculus macounii Britton	Macoun's buttercup
Ranunculus oreogenes Greene	Oregon Buttercup
Ranunculus pedatifidus Sm.	surefoot buttercup
Ranunculus pensylvanicus L. f.	Pennsylvania buttercup
Ranunculus petiolaris Kunth ex DC.	Latin American buttercup
Ranunculus ranunculinus (Nutt.) Rydb.	Tadpole Buttercup
Ranunculus repens L.	creeping buttercup
Ranunculus sceleratus L.	cursed buttercup
Ranunculus testiculatus Crantz	Curveseed Butterwort
Ranunculus trichophyllus Chaix	threadleaf crowfoot
Ranunculus uncinatus D. Don ex G. Don	woodland buttercup
Raphanus raphanistrum L.	wild radish
Raphanus sativus L.	cultivated radish
Ratibida columnifera (Nutt.) Wooton & Standl.	Upright Prairie Coneflower
Ratibida tagetes (James) Barnhart	green prairie coneflower
Rayjacksonia annua (Rydb.) R.L. Hartm. & M.A. Lane	viscid tansyaster
Redfieldia flexuosa (Thurb.) Vasey	blowout grass
Reseda lutea L.	yellow mignonette
Reseda luteola L.	weld
Rhamnus cathartica L.	Common Buckthorn
Rhamnus crocea Nutt.	Redberry Buckthorn
Rhamnus ilicifolia Kellogg	hollyleaf redberry
Rhamnus serrata Humb. & Bonpl. ex Schult.	sawleaf buckthorn
Rhamnus smithii Greene	Smith's buckthorn
Rhinanthus minor L.	little yellow rattle
Rhinotropis acanthoclada (A.Gray) J.R.Abbott	Thorn Milkwort
Rhinotropis intermontana (T.Wendt) J.R.Abbott	Intermountain Milkwort
Rhinotropis lindheimeri (A.Gray) J.R.Abbott	Shrubby Milkwort
Rhinotropis rusbyi (Greene) J.R.Abbott	Rusby's Milkwort
Rhinotropis subspinosa (S.Watson) J.R.Abbott	Spiny Milkwort
Rhodiola integrifolia Raf.	ledge stonecrop
Rhodiola rhodantha (A. Gray) H. Jacobsen	Redpod Stonecrop
Rhus aromatica Aiton	Fragrant Sumac
Rhus glabra L.	Smooth Sumac
Rhus microphylla Engelm. ex A. Gray	littleleaf sumac
Rhus ovata S. Watson	sugar sumac
Rhus trilobata Nutt.	Skunkbush Sumac
Rhynchosia senna Gillies ex Hook.	Texas snoutbean
Rhynchosida physocalyx (A. Gray) Fryxell	buffpetal
Ribes americanum Mill.	American Black Currant
Ribes aureum Pursh	Golden Currant
Ribes cereum Douglas	wax currant
Ribes inerme Rydb.	whitestem gooseberry
Ribes lacustre (Pers.) Poir.	prickly currant
Ribes laxiflorum Pursh	trailing black currant
Ribes leptanthum A. Gray	trumpet gooseberry
Ribes montigenum McClatchie	gooseberry currant
Ribes niveum Lindl.	snow currant
Ribes pinetorum Greene	orange gooseberry
Ribes velutinum Greene	desert gooseberry
Ribes viscosissimum Pursh	sticky currant
Ribes wolfii Rothr.	Wolf's currant
Ricinus communis L.	castorbean
Robinia neomexicana A. Gray	New Mexico locust
Robinia pseudoacacia L.	Black Locust
Rorippa alpina (S. Watson) Rydb.	Alpine Yellowcress
Rorippa curvipes Greene	bluntleaf yellowcress
Rorippa microtitis (B.L. Rob.) Rollins	Chihuahuan Yellowcress
Rorippa palustris (L.) Besser	bog yellowcress
Rorippa sinuata (Nutt.) Hitchc.	spreading yellowcress
Rorippa sphaerocarpa (A. Gray) Britton	roundfruit yellowcress
Rorippa sylvestris (L.) Besser	Creeping Yellowcress
Rorippa tenerrima Greene	Modoc yellowcress
Rosa acicularis Lindl.	Prickly Rose
Rosa arkansana Porter	prairie rose
Rosa multiflora Thunb.	Multiflora Rose
Rosa nutkana C. Presl	Nootka Rose
Rosa spinosissima L.	Scotch rose
Rosa stellata Wooton	desert rose
Rosa woodsii Lindl.	Woods' Rose
Rostraria cristata (L.) Tzvelev	Mediterranean hairgrass
Rotala ramosior (L.) Koehne	lowland rotala
Rubus arizonensis Focke	Arizona dewberry
Rubus deliciosus Torr.	Delicious Raspberry
Rubus leucodermis Douglas ex Torr. & A. Gray	whitebark raspberry
Rubus neomexicanus A. Gray	New Mexico raspberry
Rubus parviflorus Nutt.	thimbleberry
Rubus strigosus Michx.	American Red Raspberry
Rudbeckia amplexicaulis Vahl	Clasping Coneflower
Rudbeckia hirta L.	Black-eyed Susan	✓
Rudbeckia laciniata L.	Cutleaf Coneflower	✓
Rumex acetosella L.	Common Sheep Sorrel
Rumex altissimus Alph. Wood	pale dock
Rumex crispus L.	curly dock
Rumex densiflorus Osterh.	Denseflowered Dock
Rumex dentatus L.	toothed dock
Rumex hastatulus Baldw.	Heartwing Sorrel
Rumex hymenosepalus Torr.	canaigre dock
Rumex nematopodus Rech. f.	Arizona dock
Rumex obtusifolius L.	Bitter Dock
Rumex occidentalis S. Watson	Western Dock
Rumex orthoneurus Rech. f.	Chiricahua Mountain dock
Rumex patientia L.	Patience Dock
Rumex pulcher L.	fiddle dock
Rumex venosus Pursh	Veiny Dock
Rumex verticillatus L.	Swamp Dock
Rumex violascens Rech. f.	Violet Dock
Ruppia cirrhosa (Petagna) Grande	spiral ditchgrass
Sabulina macrantha (Rydb.) Dillenb. & Kadereit	House's Stitchwort
Sabulina rubella (Wahlenb.) Dillenb. & Kadereit	Beautiful Sandwort
Saccharum ravennae (L.) L.	ravennagrass
Sageretia wrightii S. Watson	Wright's mock buckthorn
Sagina saginoides (L.) Karst.	arctic pearlwort
Sagittaria brevirostra Mack. & Bush	shortbeak arrowhead
Sagittaria calycina Engelm.	Hooded Arrowhead
Sagittaria cuneata Sheldon	arumleaf arrowhead
Sagittaria latifolia Willd.	Broadleaf Arrowhead
Sagittaria longiloba Engelm. ex J.G. Sm.	longbarb arrowhead
Sairocarpus kingii (S. Watson) D.A. Sutton	Least Snapdragon
Sairocarpus pusillus (Brandegee) D.A. Sutton	lesser snapdragon
Salazaria mexicana Torr.	Mexican bladdersage
Salicornia rubra A. Nelson	red swampfire
Salix alba L.	White Willow
Salix amygdaloides Andersson	peachleaf willow
Salix arizonica Dorn	Arizona Willow
Salix bebbiana Sarg.	Bebb Willow
Salix bonplandiana Kunth	Bonpland willow
Salix boothii Dorn	Booth's willow
Salix brachycarpa Nutt.	Shortfruit Willow
Salix cascadensis Cockerell	cascade willow
Salix drummondiana Barratt ex Hook.	Drummond's willow
Salix exigua Nutt.	narrowleaf willow
Salix geyeriana Andersson	Geyer willow
Salix glauca L.	grayleaf willow
Salix gooddingii C.R. Ball	Goodding's Willow
Salix interior Rowlee	Sandbar Willow
Salix irrorata Andersson	dewystem willow
Salix laevigata Bebb	red willow
Salix lasiolepis Benth.	arroyo willow
Salix ligulifolia (C.R. Ball) C.R. Ball ex C.K. Schneid.	Strapleaf Willow
Salix lutea Nutt.	yellow willow
Salix monticola Bebb	Park Willow
Salix nivalis Hook.	snow willow
Salix petiolaris Sm.	meadow willow
Salix petrophila Rydb.	alpine willow
Salix planifolia Pursh	Diamondleaf Willow
Salix reticulata L.	Netleaf Willow
Salix scouleriana Barratt ex Hook.	Scouler's willow
Salix wolfii Bebb	Wolf's Willow
Salpichroa origanifolia (Lam.) Thell.	lily of the valley vine
Salsola collina Pall.	slender Russian thistle
Salsola paulsenii Litv.	barbwire Russian thistle
Salsola tragus L.	prickly Russian thistle
Salvia aethiopis L.	Mediterranean sage
Salvia azurea Michx. ex Lam.	Azure Blue Sage
Salvia columbariae Benth.	chia
Salvia dorrii (Kellogg) Abrams	purple sage
Salvia farinacea Benth.	mealycup sage
Salvia henryi A. Gray	crimson sage
Salvia mohavensis Greene	Mojave sage
Salvia pachyphylla Epling ex Munz	Blue Sage
Salvia pinguifolia (Fernald) Wooton & Standl.	rock sage
Salvia pratensis L.	introduced sage
Salvia reflexa Hornem.	Lanceleaf Sage
Salvia sclarea L.	Clary Sage
Salvia subincisa Benth.	sawtooth sage
Salvinia minima Baker	water spangles
Sambucus racemosa L.	Red Elderberry
Sanicula marilandica L.	Maryland Sanicle
Sanvitalia abertii A. Gray	Abert's creeping zinnia
Sapindus saponaria L.	wingleaf soapberry
Saponaria officinalis L.	bouncingbet
Sarcobatus vermiculatus (Hook.) Torr.	Greasewood
Sarcocornia utahensis (Tidestr.) A.J. Scott	Utah swampfire
Sartwellia flaveriae A. Gray	threadleaf glowwort
Saxifraga adscendens L.	wedgeleaf saxifrage
Saxifraga bronchialis L.	Yellowdot Saxifrage
Saxifraga caespitosa L.	tufted alpine saxifrage
Saxifraga cernua L.	Nodding Saxifrage
Saxifraga chrysantha A. Gray	Goldbloom Saxifrage
Saxifraga flagellaris Willd. ex Sternb.	Whiplash Saxifrage
Saxifraga hyperborea R. Br.	Pygmy Saxifrage
Scabrethia scabra (Hook.) W.A. Weber	Badlands Mule-Ears
Schedonnardus paniculatus (Nutt.) Trel.	tumblegrass
Schiedeella arizonica P.M. Brown	parasitic lady's tresses
Schismus arabicus Nees	Arabian schismus
Schismus barbatus (Loefl. ex L.) Thell.	common Mediterranean grass
Schistophragma intermedia (A. Gray) Pennell	harlequin spiralseed
Schizachne purpurascens (Torr.) Swallen	false melic
Schizachyrium cirratum (Hack.) Wooton & Standl.	Texas bluestem
Schizachyrium sanguineum (Retz.) Alston	crimson bluestem
Schizachyrium scoparium (Michx.) Nash	Little Bluestem
Schkuhria multiflora Hook. & Arn.	manyflower false threadleaf
Schkuhria pinnata (Lam.) Kuntze ex Thell.	pinnate false threadleaf
Schoenoplectus acutus (Muhl. ex Bigelow) Á. Löve & D. Löve	Hardstem Bulrush
Schoenoplectus americanus (Pers.) Volkart ex Schinz & R. Keller	chairmaker's bulrush
Schoenoplectus californicus (C.A. Mey.) Palla	California Bulrush
Schoenoplectus pungens (Vahl) Palla	common threesquare
Schoenoplectus tabernaemontani (C.C. Gmel.) Palla	softstem bulrush
Scirpus atrovirens Willd.	green bulrush
Scirpus microcarpus J. Presl & C. Presl	panicled bulrush
Scirpus nevadensis S. Watson	Nevada bulrush
Scirpus pallidus (Britton) Fernald	Cloaked Bulrush
Sclerocactus mesae-verdae (Boissev. & C. Davidson) L.D. Benson	Mesa Verde Fishhook Cactus
Sclerocactus papyracanthus (Engelm.) N.P. Taylor	paperspine fishhook cactus
Sclerocactus parviflorus Clover & Jotter	Smallflower Fishhook Cactus
Sclerocactus sileri (L.D. Benson) K.D. Heil & J.M. Porter	Siler Fishhook Cactus
Sclerocactus whipplei (Engelm. & J.M. Bigelow) Britton & Rose	Whipple's Fishhook Cactus
Sclerochloa dura (L.) P. Beauv.	common hardgrass
Scleropogon brevifolius Phil.	burrograss
Scolochloa festucacea (Willd.) Link	common rivergrass
Scopulophila rixfordii (Brandegee) Munz & I.M. Johnst.	Rixford's Rockwort
Scorzonera laciniata L.	cutleaf vipergrass
Scrophularia californica Cham. & Schltdl.	California figwort
Scrophularia lanceolata Pursh	lanceleaf figwort
Scrophularia macrantha Greene ex Stiefelhagen	New Mexico figwort
Scrophularia montana Wooton	mountain figwort
Scrophularia parviflora Wooton & Standl.	pineland figwort
Scutellaria brittonii Porter	Britton's Skullcap
Scutellaria drummondii Benth.	Drummond's skullcap
Scutellaria galericulata L.	marsh skullcap
Scutellaria lateriflora L.	blue skullcap
Scutellaria potosina Brandegee	Mexican skullcap
Secale cereale L.	Cereal Rye
Securigera varia (L.) Lassen	crownvetch
Sedum cockerellii Britton	Cockerell's stonecrop
Sedum lanceolatum Torr.	spearleaf stonecrop
Sedum stelliforme S. Watson	Huachuca Mountain stonecrop
Sedum wrightii A. Gray	Wright's stonecrop
Selaginella arizonica Maxon	Arizona spikemoss
Selaginella densa Rydb.	lesser spikemoss
Selaginella lepidophylla (Hook. & Grev.) Spring	flower of stone
Selaginella leucobryoides Maxon	Mojave Spikemoss
Selaginella mutica D.C. Eaton ex Underw.	bluntleaf spikemoss
Selaginella peruviana (Milde) Hieron.	Peruvian spikemoss
Selaginella rupincola Underw.	Rockloving Spikemoss
Selaginella underwoodii Hieron.	Underwood's spikemoss
Selaginella watsonii Underw.	Watson's spikemoss
Selaginella weatherbiana R. Tryon	Weatherby's Spikemoss
Selenia dissecta Torr. & A. Gray	Texas selenia
Senecio actinella Greene	Flagstaff ragwort
Senecio amplectens A. Gray	Showy Alpine Ragwort
Senecio arizonicus Greene	Arizona ragwort
Senecio atratus Greene	Tall Blacktip Ragwort
Senecio bigelovii A. Gray	nodding ragwort
Senecio crassulus A. Gray	thickleaf ragwort
Senecio eremophilus Richardson	desert ragwort
Senecio flaccidus Less.	threadleaf ragwort
Senecio fremontii Torr. & A. Gray	dwarf mountain ragwort
Senecio integerrimus Nutt.	lambstongue ragwort
Senecio lemmonii A. Gray	Lemmon's ragwort
Senecio mohavensis A. Gray	Mojave ragwort
Senecio parryi A. Gray	mountain ragwort
Senecio pudicus Greene	Bashful Ragwort
Senecio riddellii Torr. & A. Gray	Riddell's ragwort
Senecio serra Hook.	tall ragwort
Senecio soldanella A. Gray	Colorado Ragwort
Senecio spartioides Torr. & A. Gray	broom-like ragwort
Senecio taraxacoides (A. Gray) Greene	Dandelion Ragwort
Senecio triangularis Hook.	arrowleaf ragwort
Senecio vulgaris L.	Common Groundsel
Senecio wootonii Greene	Wooton's ragwort
Senega alba (Nutt.) J.F.B.Pastore & J.R.Abbott	White Milkwort
Senega sanguinea (L.) J.F.B.Pastore & J.R.Abbott	Field Milkwort
Senega scoparioides (Chodat) J.F.B.Pastore & J.R.Abbott	Broom Milkwort
Senegalia greggii (A. Gray) Britton & Rose	Catclaw Acacia
Senna armata (S. Watson) Irwin & Barneby	desertsenna
Senna artemisioides (Gaudich. ex DC.) Randell	silver senna
Senna bauhinioides (A. Gray) Irwin & Barneby	twinleaf senna
Senna covesii (A. Gray) Irwin & Barneby	Coues' cassia
Senna lindheimeriana (Scheele) Irwin & Barneby	velvet leaf senna
Senna roemeriana (Scheele) Irwin & Barneby	twoleaf senna
Sesbania herbacea (Mill.) McVaugh	Bigpod Sesbania
Sesuvium verrucosum Raf.	verrucose seapurslane
Setaria adhaerens (Forssk.) Chiov.	bur bristlegrass
Setaria faberi Herrm.	Giant Foxtail
Setaria grisebachii Fourn.	Grisebach's bristlegrass
Setaria italica (L.) P. Beauv.	Foxtail Millet
Setaria leucopila (Scribn. & Merr.) K. Schum.	streambed bristlegrass
Setaria liebmannii Fourn.	Liebmann's Bristlegrass
Setaria macrostachya Kunth	Large-Spike Bristlegrass
Setaria pumila (Poir.) Roem. & Schult.	yellow foxtail
Setaria verticillata (L.) P. Beauv.	hooked bristlegrass
Setaria viridis (L.) P. Beauv.	green bristlegrass
Setaria vulpiseta (Lam.) Roem. & Schult.	Plains Bristlegrass
Shepherdia argentea (Pursh) Nutt.	Silver Buffaloberry
Shepherdia canadensis (L.) Nutt.	Russet Buffaloberry
Shepherdia rotundifolia Parry	roundleaf buffaloberry
Shinnersoseris rostrata (A. Gray) S. Tomb	beaked skeletonweed
Sibbaldia procumbens L.	Creeping Sibbaldia
Sicyos laciniatus L.	Cutleaf Bur Cucumber
Sicyos parviflorus Willd.	smallflower bur cucumber

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