Search by Scientific Name
200 records
| Scientific Name | Common Name | Other Names | Family |
|---|---|---|---|
| Pachysandra procumbens | allegheny-spurge | mountain spurge | Buxaceae |
| Packera glabella | butterweed | cress-leaf groundsel, yellowtop | Asteraceae |
| Packera obovata | roundleaf ragwort | golden groundsel, roundleaf groundsel, squawweed | Asteraceae |
| Packera tomentosa | woolly groundsel | woolly ragwort, southern woolly groundsel | Asteraceae |
| Palafoxia callosa | small palafoxia | small palafox | Asteraceae |
| Palafoxia texana | texas palafox | Asteraceae | |
| Pancratium maritimum | carolina spider-lily | carolina spiderlily, northern spiderlily, sea-daffodil | Liliaceae |
| Panicum amarum | bitter panicgrass | bitter panicum, beachgrass, coastal panic grass | Poaceae |
| Panicum brachyanthum | prairie panicgrass | Poaceae | |
| Panicum capillare | witchgrass | panicgrass, ticklegrass, tumble panic, tumbleweed grass, witches hair, annual witchgrass, common panic grass, common witchgrass | Poaceae |
| Panicum dichotomiflorum | fall panicum | western witchgrass, fall panicgrass, fall panic | Poaceae |
| Panicum hemitomon | maidencane | mountain panic, paille fine | Poaceae |
| Panicum repens | torpedo grass | couch panicum, creeping panic, panic, rampant, wainaku grass, torpedograss | Poaceae |
| Panicum rigidulum var. rigidulum | redtop panicgrass | Poaceae | |
| Panicum verrucosum | warty panicgrass | Poaceae | |
| Panicum virgatum | old switch panic grass | switchgrass, wand panic grass | Poaceae |
| Parapholis incurva | curved sicklegrass | Poaceae | |
| Parentucellia viscosa | yellow glandweed | Scrophulariaceae | |
| Parietaria pensylvanica | pennsylvania pellitory | pennsylvania cucumber plant, hammerwort | Urticaceae |
| Parkinsonia aculeata | jerusalem thorn | mexican palo verde, jerusalem-thorn, retama, paloverde, horsebean, lluvia de oro | Fabaceae |
| Parnassia grandifolia | largeleaf grass of parnassus | largeleaf grass-of-parnassus, bigleaf grass-of-parnassus, limeseep parnassia | Saxifragaceae |
| Paronychia drummondii | drummond's nailwort | Caryophyllaceae | |
| Paronychia erecta | squareflower | Caryophyllaceae | |
| Parthenium hysterophorus | false ragweed | santa maria feverfew, ragweed parthenium, whitetop weed, cicutilla | Asteraceae |
| Parthenium integrifolium | wild quinine | american fever-few, eastern parthenium | Asteraceae |
| Parthenocissus quinquefolia | virginia-creeper | virginia creeper, american ivy, fiveleaved ivy, woodbine | Vitaceae |
| Paspalidium geminatum | egyptian panicgrass | egyptian panicum | Poaceae |
| Paspalum bifidum | pitchfork crowngrass | Poaceae | |
| Paspalum denticulatum | longtom | tropic lalo | Poaceae |
| Paspalum dilatatum | dallisgrass | dallis grass, herbe de miel, herbe sirop, hiku nua, palpalum dilate, water grass, dallas grass, dallisgrass | Poaceae |
| Paspalum distichum | knotgrass | Poaceae | |
| Paspalum floridanum | florida paspalum | Poaceae | |
| Paspalum langei | rustyseed paspalum | Poaceae | |
| Paspalum modestum | water paspalum | Poaceae | |
| Paspalum monostachyum | gulfdune paspalum | Poaceae | |
| Paspalum notatum | common bahiagrass | bahia grass, bahiagrass | Poaceae |
| Paspalum plicatulum | brownseed paspalum | brownseed paspale | Poaceae |
| Paspalum praecox | early paspalum | Poaceae | |
| Paspalum pubiflorum | hairyseed paspalum | Poaceae | |
| Paspalum repens | horsetail paspalum | water paspalum | Poaceae |
| Paspalum setaceum | thin paspalum | slender crown grass, fringeleaf paspalum, sand paspalum | Poaceae |
| Paspalum urvillei | vaseygrass | vasey grass, vasey's grass, vaseygrass | Poaceae |
| Paspalum vaginatum | seashore paspalum | Poaceae | |
| Passiflora incarnata | purple passion-flower | purple passionflower, maypop, apricot vine, purple passionflower, purple passion vine, may-pop, pasionaria | Passifloraceae |
| Passiflora lutea | yellow passionflower | yellow passion vine | Passifloraceae |
| Pastinaca sativa | wild parsnip | garden parsnip | Apiaceae |
| Paulownia tomentosa | princesstree | Scrophulariaceae | |
| Pedicularis canadensis | canadian louse-wort | common lousewort, early lousewort, canadian lousewort, wood betony, woody-betony, woody betony, wood betony | Scrophulariaceae |
| Pediomelum digitatum | palmleaf indian breadroot | palm-leaved scurf-pea | Fabaceae |
| Pediomelum rhombifolium | gulf indian breadroot | brown-flowered psoralea | Fabaceae |
| Peltandra sagittifolia | white arrow arum | white arum, spoonflower | Araceae |
| Peltandra virginica | green arrow-arum | green arrow arum, tuckahoe, arrow arum, green arum | Araceae |
| Penstemon digitalis | foxglove beardtongue | talus slope penstemon, mississippi penstemon, mississippi beardtongue, smooth white penstemon, smooth white beardtongue, talus slope beardtongue, foxglove penstemon, foxglove beardtongue, smooth penstemon | Scrophulariaceae |
| Penstemon laxiflorus | muskogee beardtongue | nodding penstemon, nodding beardtongue, loose-flowered penstemon, loose-flowered beardtongue | Scrophulariaceae |
| Penstemon murrayanus | scarlet beardtongue | scarlet penstemon, red penstemon, red beardtongue, cupleaf penstemon, cupleaf beardtongue | Scrophulariaceae |
| Penstemon tenuis | gulf coast penstemon | sharpsepal beardtongue, brazos penstemon, brazos beardtongue, gulf penstemon, gulf beardtongue, gulf coast penstemon, gulf coast beardtongue, sharp-sepal penstemon, sharp-sepal beardtongue | Scrophulariaceae |
| Penstemon tubaeflorus | white wand beardtongue | white wand penstemon, tube penstemon | Scrophulariaceae |
| Penthorum sedoides | ditch stonecrop | ditch stonecrop, virginia penthorum, ditch-stonecrop | Crassulaceae |
| Perilla frutescens | beefsteakplant | Lamiaceae | |
| Persea borbonia | red bay | Lauraceae | |
| Persea palustris | swamp bay | swampbay, swamp-bay | Lauraceae |
| Persicaria arifolium | halberdleaf tearthumb | Polygonaceae | |
| Persicaria glabra | denseflower knotweed | Polygonaceae | |
| Persicaria hydropiper | marshpepper knotweed | water smartweed, water pepper | Polygonaceae |
| Persicaria hydropiperoides | swamp smartweed | mild water pepper, mild waterpepper, false waterpepper | Polygonaceae |
| Persicaria lapathifolia | curlytop knotweed | curl-top smartweed, pale smartweed, dock-leaved smartweed | Polygonaceae |
| Persicaria maculosa | spotted ladysthumb | Polygonaceae | |
| Persicaria punctata | dotted smartweed | Polygonaceae | |
| Persicaria setacea | bog smartweed | Polygonaceae | |
| Persicaria virginiana | jumpseed | Polygonaceae | |
| Phacelia glabra | smooth phacelia | Hydrophyllaceae | |
| Phacelia strictiflora | prairie phacelia | Hydrophyllaceae | |
| Phalaris angusta | timothy canarygrass | Poaceae | |
| Phalaris caroliniana | carolina canary grass | carolina canarygrass, maygrass | Poaceae |
| Phanopyrum gymnocarpon | cottonmouth grass | savannah-panicgrass, savannah panic grass, savannah panicum | Poaceae |
| Phaseolus polystachios | thicket bean | Fabaceae | |
| Phemeranthus parviflorus | sunbright | dwarf flameflower, prairie flameflower | Portulacaceae |
| Phlox cuspidata | pointed phlox | Polemoniaceae | |
| Phlox divaricata | wild blue phlox | louisiana phlox, blue woodland phlox, sweet william, wild sweet william, blue phlox | Polemoniaceae |
| Phlox drummondii | annual phlox | phlox, drummond phlox | Polemoniaceae |
| Phlox paniculata | fall phlox | perennial phlox, summer phlox | Polemoniaceae |
| Phlox pilosa | downy phlox | prairie phlox, fragrant phlox | Polemoniaceae |
| Phlox subulata | moss phlox | creeping phlox, moss pink, rock pink | Polemoniaceae |
| Phoradendron serotinum ssp. serotinum | oak mistletoe | mistletoe, american christmas-mistletoe | Viscaceae |
| Phoradendron serotinum ssp. tomentosum | christmas mistletoe | Viscaceae | |
| Phragmites australis | common reed | phragmites | Poaceae |
| Phryma leptostachya | american lopseed | lopseed | Verbenaceae |
| Phyla lanceolata | lanceleaf fogfruit | lanceleaf frog fruit, northern fogfruit, frog fruit, lanceleaf fogfruit, lanceleaf frogfruit, northern frog-fruit | Verbenaceae |
| Phyla nodiflora | common frogfruit | common frog-fruit, cape-weed, turkey-tangle, mat-grass, hierba de la vargen maria, frog fruit, frogfruit, sawtooth fogfruit, turkey tangle, turkey tangle fogfruit, turkey tangle frogfruit, texas frogfruit | Verbenaceae |
| Phyllanthus evanescens | birdseed leaf-flower | Euphorbiaceae | |
| Phyllanthus urinaria | leaf flower | chamber bitter | Euphorbiaceae |
| Physalis angulata | cut-leaf ground-cherry | cutleaf groundcherry, cut-leaf ground-cherry, lanceleaf groundcherry | Solanaceae |
| Physalis angustifolia | coastal groundcherry | Solanaceae | |
| Physalis cinerascens | smallflower groundcherry | Solanaceae | |
| Physalis pubescens | downy ground-cherry | husk tomato, groundcherry, husk-tomato, tomate fresadilla | Solanaceae |
| Physalis virginiana | virginia groundcherry | Solanaceae | |
| Physostegia angustifolia | narrowleaf false dragonhead | narrowleaf dragonhead, false dragon-head | Lamiaceae |
| Physostegia correllii | correll's false dragonhead | Lamiaceae | |
| Physostegia digitalis | finger false dragonhead | false dragonhead | Lamiaceae |
| Physostegia intermedia | slender false dragonhead | intermediate dragonhead, marsh obedient-plant, obedient-plant, spring obedient plant | Lamiaceae |
| Physostegia longisepala | longsepal false dragonhead | Lamiaceae | |
| Physostegia virginiana | obedient plant | obedient-plant, fall obedient plant, false dragonhead, virginia lions-heart, obedience | Lamiaceae |
| Phytolacca americana | polkweed | inkberry, pigeonberry, pokeberry, common pokeweed, phytolaque d'amérique, poke, american pokeweed, great pokeweed, red ink plant | Phytolaccaceae |
| Pilea pumila | canadian clearweed | canada clearweed, clearweed | Urticaceae |
| Pinguicula lutea | yellow butterwort | Lentibulariaceae | |
| Pinguicula pumila | small butterwort | bog violet, dwarf butterwort | Lentibulariaceae |
| Pinus echinata | shortleaf pine | yellow pine, spruce pine, arkansas pine, shortleaf yellow pine, shortstraw pine, southern yellow pine | Pinaceae |
| Pinus elliottii | slash pine | pitch pine, yellow slash pine | Pinaceae |
| Pinus glabra | spruce pine | bottom white pine, cedar pine, walter pine, walter's pine | Pinaceae |
| Pinus palustris | long-leaf pine | longleaf pine, georgia pine, longleaf yellow pine | Pinaceae |
| Pinus taeda | loblolly pine | old field pine, bull pine, rosemary pine | Pinaceae |
| Pinus virginiana | virginia pine | jersey pine, scrub pine | Pinaceae |
| Piptochaetium avenaceum | blackseed speargrass | blackseed needlegrass | Poaceae |
| Pistia stratiotes | water lettuce | water-lettuce, apon-apon, pistie, tropical duckweed, laitue d'eau, lechuguita de agua | Araceae |
| Pityopsis graminifolia | silkgrass | narrowleaf silkgrass, grass-leaved golden-aster, silk-grass | Asteraceae |
| Planera aquatica | planertree | water-elm, water elm, planer-tree | Ulmaceae |
| Plantago aristata | bracted plantain | bottlebrush indianwheat, largebracted plantain, buckthorn | Plantaginaceae |
| Plantago lanceolata | buckhorn plantain | english plantain, lanceleaf indianwheat, lanceleaf plantain, ribgrass, ribwort, narrowleaf plantain, narrow-leaved plantain | Plantaginaceae |
| Plantago major | broadleaf plantain | great plantain, buckthorn plantain, rippleseed plantain, common plantain, lanten | Plantaginaceae |
| Plantago patagonica | woolly plantain | bristle-bract plantain, patagonian plantain | Plantaginaceae |
| Plantago virginica | pale-seed plantain | paleseed indianwheat, virginia plantain, paleseed indian-wheat, dwarf plantain, paleseed plantain, hoary plantain, southern plantain | Plantaginaceae |
| Platanthera blephariglottis | white fringed orchid | Orchidaceae | |
| Platanthera ciliaris | yellow fringed orchid | orange-fringed orchid, orange plume | Orchidaceae |
| Platanthera flava | palegreen orchid | southern rein orchid, platanthère à gorge tuberculée variété petite-herbe | Orchidaceae |
| Platanus occidentalis | american sycamore | sycamore, buttonwood, plane-tree | Platanaceae |
| Platythelys querceticola | jug orchid | Orchidaceae | |
| Pleopeltis polypodioides | resurrection fern | Polypodiaceae | |
| Pluchea baccharis | rosy camphor-weed | rosy camphorweed | Asteraceae |
| Pluchea camphorata | salt-marsh camphor-weed | camphor pluchea, camphor weed, camphor-weed | Asteraceae |
| Pluchea foetida | stinking camphorweed | stinking fleabane | Asteraceae |
| Pluchea odorata | sweetscent | marsh fleabane, saltmarsh fleabane | Asteraceae |
| Poa annua | annual bluegrass | annual blue grass, walkgrass, speargrass, spear grass | Poaceae |
| Poa autumnalis | autumn bluegrass | Poaceae | |
| Poa pratensis | kentucky bluegrass | Poaceae | |
| Podophyllum peltatum | mayapple | indian apple, wild mandrake, pomme de mai, podophylle pelt | Berberidaceae |
| Pogonia ophioglossoides | snakemouth orchid | snake-mouth orchid, beard flower, rose pogonia, snake-mouth | Orchidaceae |
| Pogonia ophioglossoides var. brachypogon | snakemouth orchid | Orchidaceae | |
| Polanisia dodecandra | redwhisker clammyweed | clammyweed, roughseed clammyweed | Capparaceae |
| Polanisia erosa | large clammyweed | Capparaceae | |
| Polygala crenata | scalloped milkwort | Polygalaceae | |
| Polygala cruciata | cross-leaf milkwort | drumheads, candy root, drum-heads | Polygalaceae |
| Polygala cymosa | tall pinebarren milkwort | tall pine-barren milkwort | Polygalaceae |
| Polygala grandiflora | showy milkwort | Polygalaceae | |
| Polygala incarnata | pink milkwort | procession flower, slender milkwort | Polygalaceae |
| Polygala leptocaulis | swamp milkwort | Polygalaceae | |
| Polygala lutea | orange milkwort | Polygalaceae | |
| Polygala mariana | maryland milkwort | Polygalaceae | |
| Polygala nana | dwarf milkwort | candy root, candyroot, bachelor's buttons, bachelor's button | Polygalaceae |
| Polygala polygama | racemed milkwort | pink milkwort | Polygalaceae |
| Polygala ramosa | low pinebarren milkwort | yellow savannah milkwort | Polygalaceae |
| Polygala verticillata | whorled milkwort | Polygalaceae | |
| Polygonatum biflorum | smooth solomon's seal | great solomon's seal, sealwort | Liliaceae |
| Polygonella americana | southern jointweed | Polygonaceae | |
| Polygonella polygama | october flower | Polygonaceae | |
| Polypogon monspeliensis | annual rabbitsfoot grass | rabbitfoot-grass, rabbitfoot grass, montpelier beardgrass, rabbitfootgrass, rabbitfoot polypogon, annual rabbitsfoot grass, rabbit'sfootgrass, rabbitfoot beardgrass | Poaceae |
| Polypremum procumbens | juniper-leaf | juniper leaf | Buddlejaceae |
| Polystichum acrostichoides | christmas fern | Dryopteridaceae | |
| Polytaenia nuttallii | nuttall's prairie parsley | prairie parsley, wild dill, prairie parsnip | Apiaceae |
| Poncirus trifoliata | hardy orange | trifoliate orange, bitter orange | Rutaceae |
| Pontederia cordata | pickerelweed | pickerel rush | Pontederiaceae |
| Ponthieva racemosa | hairy shadow witch | ponthieva racemosa, shadow-witch | Orchidaceae |
| Populus alba | white poplar | silver poplar, alamo blanco | Salicaceae |
| Populus deltoides | eastern cottonwood | plains cottonwood, common cottonwood, alamo, carolina poplar, necklace poplar | Salicaceae |
| Populus heterophylla | swamp cottonwood | swamp poplar, black cottonwood, downy poplar | Salicaceae |
| Populus nigra | lombardy poplar | lombady's poplar, black poplar, black cottonwood | Salicaceae |
| Portulaca oleracea | little hogweed | little-hogweed, purslane, common purslane, akulikuli-kula, duckweed, pursley, wild portulaca, garden purslane, pigweed, verdolaga | Portulacaceae |
| Portulaca pilosa | kiss me quick | chisme | Portulacaceae |
| Potamogeton crispus | curly pondweed | curly-leaved pondweed, curly muckweed | Potamogetonaceae |
| Potamogeton nodosus | longleaf pondweed | long-leaf pondweed | Potamogetonaceae |
| Potentilla recta | sulphur cinquefoil | Rosaceae | |
| Prenanthes barbata | barbed rattlesnakeroot | Asteraceae | |
| Proserpinaca palustris | marsh mermaidweed | marsh mermaid-weed, proserpinie des marais, common mermaid-weed | Haloragaceae |
| Proserpinaca pectinata | combleaf mermaidweed | mermaidweed, coastal plain mermaid-weed | Haloragaceae |
| Prosopis glandulosa | honey mesquite | glandular mesquite, algarroba | Fabaceae |
| Prunella vulgaris | heal-all | heal all, healall, selfheal, common selfheal, carpenter-weed | Lamiaceae |
| Prunus americana | american plum | wild plum | Rosaceae |
| Prunus angustifolia | chickasaw plum | sandhill plum | Rosaceae |
| Prunus caroliniana | carolina laurelcherry | cherry laurel, carolina cherry laurel, laurel cherry | Rosaceae |
| Prunus mexicana | mexican plum | bigtree plum, inch plum | Rosaceae |
| Prunus serotina | black cherry | black chokecherry, rum cherry, wild black cherry | Rosaceae |
| Prunus umbellata | hog plum | flatwoods plum, black sloe | Rosaceae |
| Pseudognaphalium helleri | heller's cudweed | Asteraceae | |
| Pseudognaphalium obtusifolium | rabbit-tobacco | sweet everlasting | Asteraceae |
| Ptelea trifoliata | common hoptree | wafer ash, hop tree, skunk-bush, cola de zorrillo | Rutaceae |
| Pteridium aquilinum | bracken fern | bracken, brackenfern, northern bracken fern, western brackenfern, fougère des aigle, western bracken | Dennstaedtiaceae |
| Pterocaulon virgatum | wand black root | wand blackroot | Asteraceae |
| Pteroglossaspis ecristata | wild coco | eulophia, giant orchid | Orchidaceae |
| Ptilimnium capillaceum | herbwilliam | threadleaf mockbishopweed | Apiaceae |
| Ptilimnium costatum | ribbed mock bishop-weed | ribbed mock bishopweed | Apiaceae |
| Ptilimnium nuttallii | laceflower | nuttall's mockbishopweed, mock bishop's-weed, ozark mock bishop-weed, mock bishop's weed | Apiaceae |
| Pueraria montana | kudzu | Fabaceae | |
| Punica granatum | pomegranate | Punicaceae | |
| Pycnanthemum albescens | white mountain-mint | white mountain mint, whiteleaf mountainmint | Lamiaceae |
| Pycnanthemum muticum | blue mountain-mint | clustered mountainmint, blue mountain mint | Lamiaceae |
| Pycnanthemum tenuifolium | slender mountain-mint | narrowleaf mountainmint, slender mountainmint, slender mountain mint, common horsemint | Lamiaceae |
| Pyracantha coccinea | scarlet firethorn | Rosaceae | |
| Pyrrhopappus carolinianus | false dandelion | carolina desert-chicory, carolina false dandelion, carolina desert chicory, carolina false-dandelion, texas dandelion | Asteraceae |
| Pyrrhopappus pauciflorus | smallflower desert-chicory | texas dandelion, false dandelion | Asteraceae |
| Pyrus calleryana | callery pear | Rosaceae | |
| Pyrus communis | common pear | pera | Rosaceae |