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7973 Plants Found

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Ordered by scientific name.

Scientific Name	Common Name	†	Map‡
Phacelia strictiflora (Engelm. & A. Gray) A. Gray	prairie phacelia
Phacelia tanacetifolia Benth.	lacy phacelia
Phacelia thermalis Greene	Heated Phacelia
Phalaris angusta Nees ex Trin.	timothy canarygrass
Phalaris aquatica L.	bulbous canarygrass
Phalaris arundinacea L.	Reed Canary Grass
Phalaris canariensis L.	Annual Canarygrass
Phalaris caroliniana Walter	Carolina Canarygrass
Phalaris minor Retz.	littleseed canarygrass
Phanerophlebia auriculata Underw.	eared veinfern
Phanopyrum gymnocarpon (Elliott) Nash	savannah-panicgrass
Phaseolus acutifolius A. Gray	tepary bean
Phaseolus angustissimus A. Gray	slimleaf bean
Phaseolus filiformis Benth.	slimjim bean
Phaseolus maculatus Scheele	spotted bean
Phaseolus pedicellatus Benth.	Sonoran Bean
Phaseolus polystachios	Thicket Bean
Phaseolus vulgaris L.	kidney bean
Phaulothamnus spinescens A. Gray	devilqueen
Phedimus aizoon (L.) 't Hart	Orpin Aizoon
Phedimus spurius (M. Bieb.) 't Hart	Caucasian stonecrop
Phegopteris connectilis (Michx.) Watt	long beechfern
Phegopteris hexagonoptera (Michx.) Fée	broad beechfern
Phemeranthus aurantiacus (Engelm.) Kiger	orange fameflower
Phemeranthus brevicaulis (S. Watson) Kiger	dwarf fameflower
Phemeranthus brevifolius (Torr.) Hershkovitz	Pygmy Fameflower
Phemeranthus calycinus (Engelm.) Kiger	Largeflower Fameflower
Phemeranthus confertiflorus (Greene) Hershkovitz	New Mexico fameflower
Phemeranthus longipes (Wooton & Standl.) Kiger	pink fameflower
Phemeranthus parviflorus (Nutt.) Kiger	sunbright
Phemeranthus rugospermus (Holz.) Kiger	Prairie Fameflower
Phemeranthus validulus (Greene) Kiger	Tusayan Fameflower
Philadelphus argyrocalyx Wooton	silvercup mock orange
Philadelphus coronarius L.	sweet mock orange
Philadelphus hitchcockianus Hu	Hitchcock's Mock Orange
Philadelphus inodorus L.	Scentless Mock Orange
Philadelphus lewisii Pursh	Lewis' mock orange
Philadelphus mearnsii W.H. Evans ex Koehne	Mearns' Mock Orange
Philadelphus microphyllus A. Gray	littleleaf mock orange
Philadelphus pubescens Loisel.	Hoary Mock Orange
Philadelphus texensis Hu	Texas Mock Orange
Philadelphus texensis var. ernestii (S.Y.Hu) Henrickson	Canyon Mock Orange
Philadelphus wootonii Hu	Wooton's Mock Orange
Philodendron hederaceum (Jacq.) Schott	Heartleaf Philodendron
Phippsia algida (Sol.) R. Br.	Icegrass
Phleum alpinum L.	Alpine Timothy
Phleum pratense L.	Timothy
Phlomis tuberosa L.	tuberous Jerusalem sage
Phlox albomarginata M.E. Jones	Whitemargin Phlox
Phlox alyssifolia Greene	alyssumleaf phlox
Phlox amplifolia Britton	Largeleaf Phlox
Phlox andicola E.E. Nelson	prairie phlox
Phlox bifida Beck	cleft phlox
Phlox condensata (A. Gray) E.E. Nelson	Dwarf Phlox
Phlox cuspidata Scheele	pointed phlox
Phlox diffusa Benth.	spreading phlox
Phlox divaricata L.	wild blue phlox
Phlox drummondii Hook.	Annual Phlox
Phlox glaberrima L.	Smooth Phlox
Phlox glabriflora (Brand) Whitehouse	Rio Grande phlox
Phlox hoodii Richardson	spiny phlox
Phlox kelseyi Britton	Kelsey's Phlox
Phlox longifolia Nutt.	longleaf phlox
Phlox maculata L.	Wild Sweetwilliam
Phlox mesoleuca Greene	threadleaf phlox
Phlox missoulensis Wherry	Missoula Phlox
Phlox multiflora A. Nelson	flowery phlox
Phlox nana Nutt.	Santa Fe phlox
Phlox oklahomensis Wherry	Oklahoma Phlox
Phlox paniculata L.	Fall Phlox
Phlox pilosa L.	Downy Phlox
Phlox pulvinata (Wherry) Cronquist	Cushion Phlox
Phlox roemeriana Scheele	goldeneye phlox
Phlox speciosa Pursh	showy phlox
Phlox stansburyi (Torr.) A. Heller	cold-desert phlox
Phlox subulata L.	Moss Phlox
Phoradendron bolleanum (Seem.) Eichl.	Bollean mistletoe
Phoradendron hawksworthii (Wiens) Wiens	Hawksworth's mistletoe
Phoradendron juniperinum Engelm. ex A. Gray	Juniper Mistletoe
Phoradendron leucarpum (Raf.) Reveal & M.C. Johnst.	Oak Mistletoe
Photinia glabra (Thunb.) Maxim.	Japanese Photinia
Photinia serratifolia (Desf.) Kalkm.	Taiwanese photinia
Phragmites americanus (Saltonst., P.M.Peterson & Soreng) A.Haines	American Common Reed
Phragmites australis (Cav.) Trin. ex Steud.	Eurasian Common Reed
Phryma leptostachya L.	American lopseed
Phyla cuneifolia (Torr.) Greene	wedgeleaf
Phyla fruticosa (Mill.) Kennedy	diamondleaf fogfruit
Phyla lanceolata (Michx.) Greene	Lanceleaf Fogfruit
Phyla nodiflora (L.) Greene	Turkey Tangle Fogfruit
Phyllanthopsis phyllanthoides (Nutt.) Voronts. & Petra Hoffm.	Missouri Maidenbush
Phyllanthus abnormis Baill.	Drummond's leaf-flower
Phyllanthus caroliniensis Walter	Carolina leaf-flower
Phyllanthus fraternus G.L. Webster	gulf leaf-flower
Phyllanthus polygonoides Nutt. ex Spreng.	smartweed leaf-flower
Phyllanthus tenellus Roxb.	Mascarene Island leaf-flower
Phyllanthus urinaria L.	chamber bitter
Phyllodoce empetriformis (Sm.) D. Don	pink mountainheath
Phyllodoce glanduliflora (Hook.) Coville	yellow mountainheath
Phyllostachys aurea Carrière ex A. Rivière & C. Rivière	golden bamboo
Phyllostachys aureosulcata McClure	yellow groove bamboo
Phyllostachys nigra (Lodd. ex Lindl.) Munro	black bamboo
Phyllostachys sulphurea (Carrière) A. Rivière & C. Rivière	Sulphur Bamboo
Physalis acutifolia (Miers) Sandw.	Sharpleaf Groundcherry
Physalis angulata L.	Cutleaf Groundcherry
Physalis angustifolia Nutt.	coastal groundcherry
Physalis caudella Standl.	southwestern groundcherry
Physalis cinerascens (Dunal) Hitchc.	Smallflower Groundcherry
Physalis cordata Mill.	heartleaf groundcherry
Physalis grisea (Waterf.) M. Martínez	Strawberry-Tomato
Physalis hederifolia A. Gray	ivyleaf groundcherry
Physalis heterophylla Nees	Clammy Groundcherry
Physalis longifolia Nutt.	Longleaf Groundcherry
Physalis minima L.	Pygmy Groundcherry
Physalis missouriensis Mack. & Bush	Missouri groundcherry
Physalis philadelphica Lam.	Mexican Groundcherry
Physalis pubescens L.	Husk Tomato
Physalis pumila Nutt.	Dwarf Groundcherry
Physalis pumila var. hispida (Waterf.) J.R.Sullivan	Prairie Groundcherry
Physalis subulata Rydb.	Chihuahuan groundcherry
Physalis virginiana Mill.	Virginia groundcherry
Physalis viscosa L.	Starhair Groundcherry
Physaria acutifolia Rydb.	sharpleaf twinpod
Physaria bellii G. Mulligan	Front Range Twinpod
Physaria brassicoides Rydb.	Double Twinpod
Physaria didymocarpa (Hook.) A. Gray	common twinpod
Physaria eburniflora Rollins	Devils Gate Twinpod
Physaria fendleri (A.Gray) O'Kane & Al-Shehbaz	Fendler's Bladderpod
Physaria floribunda Rydb.	Pointtip Twinpod
Physaria geyeri (Hook.) A. Gray	Geyer's Twinpod
Physaria gordonii (A.Gray) O'Kane & Al-Shehbaz	Gordon's Bladderpod
Physaria ludoviciana (Nutt.) O'Kane & Al-Shehbaz	Foothill Bladderpod
Physaria rectipes (Wooton & Standl) O'Kane & Al-Shehbaz	Straight Bladderpod
Physaria reediana O'Kane & Al-Shehbaz	Reed's Twinpod
Physaria saximontana Rollins	Fremont County twinpod
Physaria vitulifera Rydb.	Roundtip Twinpod
Physocarpus malvaceus (Greene) Kuntze	mallow ninebark
Physocarpus monogynus (Torr.) J.M. Coult.	mountain ninebark
Physocarpus opulifolius	Common Ninebark
Physostegia angustifolia Fernald	narrowleaf false dragonhead
Physostegia correllii (Lundell) Shinners	Correll's false dragonhead
Physostegia digitalis Small	finger false dragonhead
Physostegia intermedia (Nutt.) Engelm. & A. Gray	slender false dragonhead
Physostegia ledinghamii (B. Boivin) Cantino	Ledingham's false dragonhead
Physostegia longisepala Cantino	longsepal false dragonhead
Physostegia parviflora Nutt. ex A. Gray	Western False Dragonhead
Physostegia pulchella Lundell	showy false dragonhead
Physostegia virginiana (L.) Benth.	obedient plant
Phytolacca americana L.	American Pokeweed	✓
Picea abies (L.) Karst.	Norway Spruce	✓
Picea engelmannii Parry ex Engelm.	Engelmann Spruce
Picea glauca (Moench) Voss	White Spruce	✓
Picea mariana	Black Spruce	✓
Picea pungens Engelm.	Blue Spruce
Picradeniopsis oppositifolia (Nutt.) Rydb. ex Britton	oppositeleaf bahia
Picradeniopsis woodhousei (A. Gray) Rydb.	Woodhouse's Bahia
Pilea fontana (Lunell) Rydb.	Black-fruited Clearweed
Pilea microphylla (L.) Liebm.	rockweed
Pilea pumila (L.) A. Gray	Canadian Clearweed
Pilosella aurantiaca (L.) F.W.Schultz & Sch.Bip.	Fox-and-Cubs
Pilosella piloselloides (Vill.) Soják	Tall Hawkweed
Pilostyles thurberi A. Gray	Thurber's stemsucker
Pilularia americana A. Braun	American pillwort
Pinaropappus parvus S.F. Blake	small rocklettuce
Pinaropappus roseus (Less.) Less.	white rocklettuce
Pinguicula macroceras Link	California butterwort
Pinguicula pumila Michx.	small butterwort
Pinus albicaulis Engelm.	Whitebark Pine
Pinus aristata Engelm.	bristlecone pine
Pinus banksiana Lamb.	Jack Pine
Pinus contorta Douglas ex Loudon	Lodgepole Pine
Pinus echinata Mill.	Shortleaf Pine	✓
Pinus edulis Engelm.	Twoneedle Pinyon
Pinus elliottii Engelm.	Slash Pine
Pinus flexilis James	Limber Pine
Pinus monticola Douglas ex D. Don	Western White Pine
Pinus nigra Arnold	Austrian Pine
Pinus palustris Mill.	Longleaf Pine
Pinus pinea L.	Italian stone pine
Pinus ponderosa Lawson & C. Lawson	Ponderosa Pine
Pinus remota (Little) D.K. Bailey & Hawksw.	papershell pinyon
Pinus resinosa Aiton	Red Pine	✓
Pinus rigida Mill.	Pitch Pine	✓
Pinus strobiformis Engelm.	southwestern white pine
Pinus strobus L.	Eastern White Pine	✓
Pinus sylvestris L.	Scots Pine	✓
Pinus taeda L.	Loblolly Pine	✓
Pinus virginiana Mill.	Virginia Pine
Piperia unalascensis (Spreng.) Rydb.	slender-spire orchid
Piptatheropsis exigua (Thurb.) Romasch., P.M. Peterson & R.J. Soreng	Little Ricegrass
Piptatheropsis micrantha "(Trin. & Rupr.) Romasch.	littleseed ricegrass
Piptatheropsis pungens "(Torr.) Romasch.	mountain ricegrass
Piptochaetium avenaceum (L.) Parodi	blackseed speargrass
Piptochaetium fimbriatum (Kunth) Hitchc.	pinyon ricegrass
Piptochaetium pringlei (Beal) Parodi	Pringle's speargrass
Piptochaetium stipoides (Trin. & Rupr.) Hack. ex Arechav.	Purple Speargrass
Pisonia aculeata L.	pullback
Pistacia chinensis Bunge	Chinese Pistache
Pistacia mexicana Kunth	American Pistachio
Pistia stratiotes L.	Water Lettuce
Pisum sativum L.	Garden Pea
Pithecellobium dulce (Roxb.) Benth.	monkeypod
Pityopsis graminifolia (Michx.) Nutt.	narrowleaf silkgrass
Plagiobothrys figuratus (Piper) I.M. Johnst. ex M. Peck	fragrant popcornflower
Plagiobothrys leptocladus (Greene) I.M. Johnst.	finebranched popcornflower
Planera aquatica J.F. Gmel.	Planertree
Planodes virginicum (L.) Greene	Virginia Winged Rockcress
Plantago arenaria Waldst. & Kit.	sand plantain
Plantago argyrea Morris	Saltmeadow Plantain
Plantago aristata Michx.	Largebracted Plantain
Plantago canescens M.F. Adams	gray pubescent plantain
Plantago cordata Lam.	heartleaf plantain
Plantago coronopus L.	Buckhorn Plantain
Plantago eriopoda Torr.	redwool plantain
Plantago helleri Small	Heller's plantain
Plantago heterophylla Nutt.	slender plantain
Plantago hookeriana Fisch. & C.A. Mey.	California Plantain
Plantago lanceolata L.	Narrowleaf Plantain
Plantago major L.	Common Plantain
Plantago patagonica Jacq.	Woolly Plantain
Plantago pusilla Nutt.	Dwarf Plantain
Plantago rhodosperma Decne.	redseed plantain
Plantago rugelii Decne.	Blackseed Plantain
Plantago tweedyi A. Gray	Tweedy's Plantain
Plantago virginica L.	Virginia Plantain
Plantago wrightiana Decne.	Wright's plantain
Platanthera aquilonis Sheviak	northern green orchid
Platanthera brevifolia (Greene) Kranzlin	Shortflowered Bog Orchid
Platanthera chapmanii (Small) Luer	Chapman's Fringed Orchid
Platanthera ciliaris (L.) Lindl.	yellow fringed orchid
Platanthera clavellata (Michx.) Luer	small green wood orchid
Platanthera cristata (Michx.) Lindl.	Crested Yellow Orchid
Platanthera flava (L.) Lindl.	palegreen orchid
Platanthera hookeri (Torr. ex A. Gray) Lindl.	Hooker's orchid
Platanthera huronensis (Nutt.) Lindl.	Huron green orchid
Platanthera integra (Nutt.) A. Gray ex Beck	Yellow Fringeless Orchid
Platanthera lacera (Michx.) G. Don	Green Fringed Orchid
Platanthera leucophaea (Nutt.) Lindl.	Prairie White Fringed Orchid
Platanthera limosa Lindl.	Thurber's bog orchid
Platanthera nivea (Nutt.) Luer	snowy orchid
Platanthera obtusata (Banks ex Pursh) Lindl.	bluntleaved orchid
Platanthera orbiculata (Pursh) Lindl.	lesser roundleaved orchid
Platanthera praeclara Sheviak & Bowles	Great Plains white fringed orchid
Platanthera psycodes (L.) Lindl.	Lesser Purple Fringed Orchid
Platanthera sparsiflora (S. Watson) Schltr.	sparse-flowered bog orchid
Platanthera stricta Lindl.	slender bog orchid
Platanthera tescamnis Sheviak & W.F. Jenn.	Intermountain Bog Orchid
Platanus occidentalis L.	American Sycamore	✓
Platycladus orientalis (L.) Franco	Oriental Arborvitae
Platyschkuhria integrifolia (A. Gray) Rydb.	basindaisy
Plectocephalus americanus (Nutt.) D.Don	American Star-thistle
Plectocephalus rothrockii (Greenm.) D.J.N.Hind	Rothrock's Knapweed
Pleiacanthus spinosus (Nutt.) Rydb.	Thorn Skeletonweed
Pleopeltis polypodioides (L.) Andrews & Windham	resurrection fern
Pleuraphis mutica Buckley	tobosagrass
Pluchea camphorata (L.) DC.	camphor pluchea
Pluchea carolinensis (Jacq.) G. Don	cure for all
Pluchea foetida (L.) DC.	stinking camphorweed
Pluchea odorata (L.) Cass.	sweetscent
Pluchea sericea (Nutt.) Coville	Arrowweed
Plumbago auriculata Lam.	Cape leadwort
Plumbago zeylanica L.	Doctorbush
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 autumnalis Muhl. ex Elliott	autumn bluegrass
Poa bigelovii Vasey & Scribn.	Bigelow's bluegrass
Poa bulbosa L.	bulbous bluegrass
Poa chapmaniana Scribn.	Chapman's Bluegrass
Poa compressa L.	Canada bluegrass
Poa cusickii Vasey	Cusick's Bluegrass
Poa fendleriana (Steud.) Vasey	muttongrass
Poa glauca Vahl	Glaucous Bluegrass
Poa laxa Haenke	Mt. Washington bluegrass
Poa leptocoma Trin.	marsh bluegrass
Poa lettermanii Vasey	Letterman's bluegrass
Poa nemoralis L.	Wood Bluegrass
Poa occidentalis Vasey	New Mexico bluegrass
Poa paludigena Fernald & Wiegand	bog bluegrass
Poa palustris L.	Fowl Bluegrass
Poa paucispicula Scribn. & Merr.	Alaska bluegrass
Poa reflexa Vasey & Scribn. ex Vasey	Nodding Bluegrass
Poa saltuensis Fernald & Wiegand	oldpasture bluegrass
Poa secunda J. Presl	Sandberg Bluegrass
Poa stenantha Trin.	northern bluegrass
Poa sylvestris A. Gray	woodland bluegrass
Poa tracyi Vasey	Tracy's Bluegrass
Poa trivialis L.	Rough Bluegrass
Poa wheeleri Vasey	Wheeler's Bluegrass
Poa wolfii Scribn.	Wolf's bluegrass
Podistera eastwoodiae (J.M. Coult. & Rose) Mathias & Constance	Eastwood's Podistera
Podophyllum peltatum L.	Mayapple	✓
Pogonia ophioglossoides (L.) Ker Gawl.	snakemouth orchid
Polanisia dodecandra (L.) DC.	redwhisker clammyweed
Polanisia erosa (Nutt.) Iltis	large clammyweed
Polanisia jamesii (Torr. & A. Gray) Iltis	James' 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 micranthum Benth.	annual polemonium
Polemonium occidentale Greene	western polemonium
Polemonium pulcherrimum Hook.	Jacob's-ladder
Polemonium reptans L.	Jacob's Ladder
Polemonium viscosum Nutt.	Sticky Polemonium
Polycarpon tetraphyllum (L.) L.	fourleaf manyseed
Polygaloides paucifolia (Willd.) J.R.Abbott	Gaywings
Polygonatum biflorum (Walter) Elliott	Smooth Solomon's Seal
Polygonatum pubescens (Willd.) Pursh	hairy Solomon's seal
Polygonum achoreum S.F. Blake	leathery knotweed
Polygonum argyrocoleon Steud. ex Kunze	silversheath knotweed
Polygonum douglasii Greene	Douglas' knotweed
Polygonum erectum L.	Erect Knotweed
Polygonum minimum S. Watson	broadleaf knotweed
Polygonum patulum M. Bieb.	Bellard's smartweed
Polygonum pensylvanicum L.	Pennsylvania Smartweed
Polygonum ramosissimum Michx.	Bushy Knotweed
Polygonum striatulum B.L. Rob.	Striped Knotweed
Polygonum tenue Michx.	pleatleaf knotweed
Polymnia canadensis L.	whiteflower leafcup
Polypodium hesperium Maxon	western polypody
Polypodium saximontanum Windham	Rocky Mountain Polypody
Polypodium virginianum L.	rock polypody
Polypogon elongatus Kunth	streambank rabbitsfoot grass
Polypogon interruptus Kunth	ditch rabbitsfoot grass
Polypogon maritimus Willd.	Mediterranean rabbitsfoot grass
Polypogon monspeliensis (L.) Desf.	annual rabbitsfoot grass
Polypogon viridis (Gouan) Breistr.	beardless rabbitsfoot grass
Polypremum procumbens L.	Rustweed
Polystichum acrostichoides (Michx.) Schott	Christmas fern
Polystichum andersonii Hopkins	Anderson's hollyfern
Polystichum kruckebergii W.H. Wagner	Kruckeberg's Hollyfern
Polystichum lonchitis (L.) Roth	Northern Hollyfern
Polystichum munitum (Kaulf.) C. Presl	western swordfern
Polytaenia albiflora E.L. Keith	White Flowered Prairie Parsley
Polytaenia nuttallii DC.	Nuttall's Prairie Parsley
Polytaenia texana (J.M. Coult. & Rose) Mathias & Constance	Texas Prairie Parsley
Pomaria austrotexana B. Simpson	Texas holdback
Pomaria brachycarpa (A. Gray) B. Simpson	Broadpod Nicker
Pomaria jamesii (Torr. & A. Gray) Walp.	James' holdback
Pontederia azurea Sw.	Anchored Water Hyacinth
Pontederia cordata L.	Pickerelweed
Pontederia crassipes Mart.	Common Water Hyacinth
Ponthieva racemosa (Walter) C. Mohr	hairy shadow witch
Poolea reverchonii (A.Gray) Morin	Basin Bellflower
Populus ×canadensis Moench	Carolina Poplar
Populus ×jackii	Balm-of-Gilead
Populus alba L.	White Poplar
Populus angustifolia James	Narrowleaf Cottonwood
Populus balsamifera L.	Balsam Poplar
Populus deltoides W. Bartram ex Marshall	Eastern Cottonwood
Populus fremontii S. Watson	Fremont Cottonwood
Populus grandidentata Michx.	Large-tooth Aspen
Populus nigra L.	Lombardy poplar
Populus tremuloides Michx.	Quaking Aspen
Porophyllum scoparium A. Gray	Trans-Pecos poreleaf
Portulaca amilis Speg.	Paraguayan Purslane
Portulaca grandiflora Hook.	Rose Moss
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 amplifolius Tuck.	largeleaf pondweed
Potamogeton crispus L.	Curly Pondweed
Potamogeton diversifolius Raf.	waterthread pondweed
Potamogeton epihydrus Raf.	ribbonleaf pondweed
Potamogeton foliosus Raf.	Leafy Pondweed
Potamogeton friesii Rupr.	Fries' pondweed
Potamogeton gramineus L.	variableleaf pondweed
Potamogeton illinoensis Morong	Illinois Pondweed
Potamogeton natans L.	floating pondweed
Potamogeton nodosus Poir.	longleaf pondweed
Potamogeton obtusifolius Mert. & W.D.J. Koch	bluntleaf pondweed
Potamogeton praelongus Wulfen	whitestem pondweed
Potamogeton pulcher Tuck.	spotted pondweed
Potamogeton pusillus L.	small pondweed
Potamogeton richardsonii (Benn.) Rydb.	Richardson's pondweed
Potamogeton robbinsii Oakes	Robbins' Pondweed
Potamogeton spirillus Tuck.	spiral pondweed
Potamogeton strictifolius Benn.	narrowleaf pondweed
Potamogeton vaseyi J.W. Robbins	Vasey's pondweed
Potamogeton zosteriformis Fernald	flatstem pondweed
Potentilla ambigens Greene	Silkyleaf Cinquefoil
Potentilla anglica Laicharding	English Cinquefoil
Potentilla argentea L.	silver cinquefoil
Potentilla biennis Greene	biennial cinquefoil
Potentilla bipinnatifida Douglas ex Hook.	tansy cinquefoil
Potentilla canadensis L.	Dwarf 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 intermedia L.	downy cinquefoil
Potentilla macounii Rydb.	Macoun's Cinquefoil
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 reptans L.	European Cinquefoil
Potentilla rivalis Nutt.	Brook Cinquefoil
Potentilla rupincola Osterh.	Rock Cinquefoil
Potentilla sierrae-blancae Wooton & Rydb.	Sierra Blanca Cinquefoil
Potentilla simplex Michx.	Common Cinquefoil
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 conjugens (Greene) A.R.Mast & Reveal	Bonneville Shootingstar
Primula egaliksensis Wormsk. ex Hornem.	Greenland Primrose
Primula fassettii A.R.Mast & Reveal	Jeweled Shootingstar
Primula incana M.E. Jones	silvery primrose
Primula jeffreyi (Van Houtte) A.R.Mast & Reveal	Sierra Shootingstar
Primula latiloba (A.Gray) A.R.Mast & Reveal	White Shootingstar
Primula meadia (L.) A.R.Mast & Reveal	Pride of Ohio
Primula mistassinica Michx.	Mistassini primrose
Primula parryi A. Gray	Parry's Primrose
Primula pauciflora (Durand) A.R.Mast & Reveal	Darkthroat Shootingstar
Primula rusbyi Greene	Rusby's primrose
Priva lappulacea (L.) Pers.	catstongue
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 hookeri Torr.	drops-of-gold
Prosartes trachycarpa S. Watson	roughfruit fairybells
Proserpinaca intermedia Mack.	Intermediate Mermaidweed
Proserpinaca palustris L.	marsh mermaidweed
Proserpinaca pectinata Lam.	combleaf mermaidweed
Prosopis glandulosa Torr.	Honey Mesquite
Prosopis laevigata (Humb. & Bonpl. ex Willd.) M.C. Johnst.	Smooth Mesquite
Prosopis pubescens Benth.	screwbean mesquite
Prosopis reptans Benth.	tornillo
Prosopis velutina Wooton	velvet mesquite
Prunella vulgaris L.	Common Selfheal
Prunus americana Marshall	American Plum
Prunus angustifolia Marshall	Chickasaw plum
Prunus armeniaca L.	apricot
Prunus avium (L.) L.	Sweet Cherry
Prunus caroliniana Aiton	Carolina Laurelcherry
Prunus cerasifera Ehrh.	cherry plum
Prunus cerasus L.	sour cherry
Prunus domestica L.	European plum
Prunus emarginata (Douglas ex Hook.) D. Dietr.	Bitter Cherry
Prunus fruticosa Pall.	European Dwarf Cherry
Prunus gracilis Engelm. & A. Gray	Oklahoma plum
Prunus havardii (W. Wight) S.C. Mason	Havard's plum
Prunus hortulana L.H. Bailey	Hortulan Plum
Prunus mahaleb L.	Mahaleb Cherry
Prunus mexicana S. Watson	Mexican plum
Prunus minutiflora Engelm.	Texas almond
Prunus munsoniana W. Wight & Hedrick	Wild Goose Plum
Prunus murrayana Palmer	Murray's plum
Prunus nigra Aiton	Canadian Plum
Prunus pensylvanica L. f.	Pin Cherry
Prunus persica (L.) Batsch	Peach
Prunus pumila L.	Sandcherry
Prunus rivularis Scheele	creek plum
Prunus serotina Ehrh.	Black Cherry	✓
Prunus spinosa L.	blackthorn
Prunus susquehanae hort. ex Willd.	Sesquehana Sandcherry
Prunus texana D. Dietr.	peachbush
Prunus tomentosa Thunb.	Nanking cherry
Prunus triloba Lindl.	Flowering Plum
Prunus umbellata Elliott	hog plum
Prunus virginiana L.	Chokecherry
Psathyrostachys juncea (Fisch.) Nevski	Russian wildrye
Pseudabutilon umbellatum (L.) Fryxell	umbrella Indian mallow
Pseudoclappia arenaria Rydb.	Trans-Pecos false clapdaisy
Pseudoeriocoma eminens (Cav.) Romasch.	Southwestern Needlegrass
Pseudognaphalium austrotexanum G.L. Nesom	Texas rabbit-tobacco
Pseudognaphalium canescens (DC.) W.A. Weber	Wright's cudweed
Pseudognaphalium helleri (Britton) Anderb.	Heller's cudweed
Pseudognaphalium jaliscense (Greenm.) Anderb.	Jalisco rabbit-tobacco
Pseudognaphalium leucocephalum (A. Gray) Anderb.	white cudweed
Pseudognaphalium macounii (Greene) Kartesz	Macoun's cudweed
Pseudognaphalium obtusifolium (L.) Hilliard & B.L. Burtt	Rabbit-tobacco
Pseudognaphalium pringlei (A. Gray) Anderb.	Pringle's cudweed
Pseudognaphalium stramineum (Kunth) Anderb.	Cottonbatting Plant
Pseudogynoxys chenopodioides Kunth	Mexican flamevine
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
Psilactis heterocarpa (R.L. Hartm. & M.A. Lane) D. Morgan	San Patricio tansyaster
Psilocarphus brevissimus Nutt.	short woollyheads
Psilostrophe bakeri Greene	Baker's Paperflower
Psilostrophe tagetina (Nutt.) Greene	Woolly Paperflower
Psilotum nudum (L.) P. Beauv.	Whisk Fern
Psorothamnus scoparius (A. Gray) Rydb.	broom dalea
Ptelea trifoliata L.	Common Hoptree

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