Piptoporus betulinus
Pisang Awak (Musa ‘Dwarf Namwah’)
Pisonia
discolor
discolor var. longifolia
Pistacia simaruba
Pistia stratiotes
Pitavia dumosa
Pitaya (Hylocereus undatus)
Pitayita (Echinocereus pensilis)
Pitcairnia sanguinea
Pitch Pine (Pinus rigida)
Pitchfork Weed (Bidens frondosa)
Pithecellobium
ebano
flexicaule
guadalupense
keyense
minutum
pallens
tortum
Pitted Beard Lichen (Usnea cavernosa)
Piñon (Pinus edulis)
Piñon, Singleleaf (Pinus monophylla)
Placodes
igniarius
nigricans
Plains
Prickly Pear (Opuntia macrorhiza var. macrorhiza)
Wild Indigo (Baptisia bracteata var. leucophaea)
Plananthus selago
Plant,
Candelabra (Euphorbia lactea)
Century (Agave americana)
Century (Agave parryi var. parryi)
Corpse (Monotropa uniflora)
Cup (Silphium perfoliatum)
Eyeball (Acmella oleracea)
Felt (Kalanchoe beharensis)
Ghost (Monotropa uniflora)
Gout (Jatropha podagrica)
Ice (Carpobrotus edulis)
Ice (Delosperma ‘Beaufort West’)
Jade (Crassula ovata)
Lollipop (Pachystachys lutea)
Love (Oxalis triangularis)
Money (Lunaria annua)
Mosaic (Ludwigia sedioides)
Mother-of-Pearl (Graptopetalum paraguayense)
Nosebleed (Achillea millefolium)
Obedient (Physostegia virginiana)
Paddle (Kalanchoe thrysiflora)
Pagoda (Crassula perforata)
Pincushion (Diapensia lapponica)
Propellor (Crassula perfoliata var. minor)
Rattlesnake (Calathea crotalifera)
Slipper (Pedilanthus macrocarpus)
Spider (Cleome hassleriana)
Ti (Cordyline fruticosa)
Toothache (Acmella oleracea)
Umbrella (Cyperus involucratus)
Umbrella (Podophyllum peltatum)
Unicorn (Proboscidea parviflora)
Zebra (Calathea zebrina)
Zebra (Cryptanthus zonatus ‘Zebrinus’)
Planta de Sal (Batis maritima)
Plantago
altissima
aristata
aristata var. nuttallii
asiatica
halophila
lanceolata
lanceolata var. sphaerostachya
major
major ssp. intermedia
major var. asiatica
major var. intermedia
major var. pachyphylla
major var. pilgeri
major var. scopulorum
patagonica var. aristata
Plantain
Lily (Hosta sieboldiana ‘Big Daddy’)
Lily (Hosta ‘Fire and Ice’)
Lily (Hosta ‘Hadspen Heron’)
Lily (Hosta ‘Sum and Substance’)
Plantain,
Common (Plantago major)
English (Plantago lanceolata)
Ribwort (Plantago lanceolata)
Plantain-leaf Sedge (Carex plantaginea)
Plantain-leaved Pussytoes (Antennaria plantaginifolia)
Plants, Air (Tillandsia)
Plaster, Adam’s (Polygonum persicaria)
Platanthera psycodes
Platanus
occidentalis
occidentalis var. glabrata
Platycladus orientalis
Platycodon
grandiflorum var.
grandiflorus
Platyopuntia
cordobensis
vulgaris
Pleopeltis polypodioides
Pleuraphis rigida
Pleurisy Root (Asclepias tuberosa)
Pleurocybella porrigens
Pleuropterus
cuspidatus
zuccarinii
Pleurotus
citrinopileatus
djamor
flabellatus
ostreatus
sp.
Pleurozium
schreberi
schreberi var. tananae
Plitt’s Rock Shield (Xanthoparmelia plittii)
Pluchea
rosea
sericea
Plum Yew (Cephalotaxus harringtonia ‘Prostrata’)
Plum,
Beach (Prunus maritima)
Natal (Carissa macrocarpa)
Pigeon (Coccoloba diversifolia)
Saffron (Sideroxylon celastrinum)
Plumbago larpentiae
Plumbago, Blue (Ceratostigma plumbaginoides)
Plume,
Apache (Fallugia paradoxa)
Ostrich (Alpinia purpurata cv. ‘Tahitian Ginger’)
Ostrich (Alpinia purpurata)
Prince’s (Stanleya pinnata)
Solomon’s (Maianthemum racemosum ssp. racemosum)
Plumeria sp.
Plymouth Gentian (Sabatia kennedyana)
Poa
compressa
pilosa
pratensis
spectabilis
Pocilla persica
Pod,
Spectacle (Dimorphocarpa wislizeni)
Spectacle (Dithyrea californica)
Podocarpus
henkelii
macrophyllus
Podophyllum peltatum
Pogonatum
alpinum
alpinum var. arcticum
alpinum var. brevifolium
alpinum var. campanulatum
alpinum var. macounii
alpinum var. septentrionale
alpinum var. sylvaticum
macounii
urnigerum
urnigerum var. subintegrifolium
Pogonatum, Blue-green (Pogonatum urnigerum)
Pogonia
ophioglossoides
ophioglossoides var. brachypogon
Pogonia,
Nodding (Triphora trianthophora)
Rose (Pogonia ophioglossoides)
Poinciana
gilliesii
pulcherrima
Poinciana, Royal (Delonix regia)
Poinsettia (Euphorbia pulcherrima)
Poinsettia
barbellata
cyathophora
cyathophora var. graminifolia
graminifolia
havanensis
pulcherrima
Pointed Broom Sedge (Carex scoparia)
Poison Ivy (Toxicodendron radicans)
Poisontree, Florida (Metopium toxiferum)
Poisonwood (Metopium toxiferum)
Poke Milkweed (Asclepias exaltata)
Poke, Indian (Veratrum viride)
Poker, Redhot (Kniphofia uvaria)
Pokeweed (Phytolacca americana)
Pokeweed, American (Phytolacca americana)
Polanisia dodecandra
Polecat Weed (Symplocarpus foetidus)
Polemonium
caeruleum
caeruleum ssp. vanbruntiae
caeruleum var. album
reptans
vanbruntiae
Polianthes
lata
virginica
Polyalthia longifolia
Polygala
balduinii
balduinii var. balduinii
balduinii var. carteri
paucifolia
sanguinea
viridescens
Polygala, Fringed (Polygala paucifolia)
Polygonatum
Polygonatum
biflorum
biflorum var. commutatum
canaliculatum
commutatum
humile
odoratum
odoratum var. pluriflorum ‘Variegatum’
Polygonella articulata
Polygonum
amphibium
arifolium
arifolium var. lentiforme
arifolium var. pubescens
articulatum
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Polygonum
bicorne
caespitosum var.
careyi
cespitosum
cilinode
cilinode var. laevigatum
convolvulus var. convolvulus
cuspidatum
cuspidatum var. compactum
dubium
fusiforme
hydropiperoides
hydropiperoides var. adenocalyx
hydropiperoides var. asperifolium
hydropiperoides var. breviciliatum
hydropiperoides var. bushianum
hydropiperoides var. digitatum
hydropiperoides var. euronotorum
hydropiperoides var. opelousanum
hydropiperoides var. psilostachyum
hydropiperoides var. strigosum
incanum
incarnatum
lapathifolium
lapathifolium ssp. pallidum
lapathifolium var. incanum
lapathifolium var. nodosum
lapathifolium var. ovatum
lapathifolium var. prostratum
lapathifolium var. salicifolium
longistylum
longistylum var. omissum
mexicanum
minus
minus var. subcontinuum
mississippiense
mississippiense var. interius
nodosum
oneillii
opelousanum
opelousanum var. adenocalyx
pensylvanicum
pensylvanicum ssp. oneillii
pensylvanicum var. durum
pensylvanicum var. eglandulosum
pensylvanicum var. genuinum
pensylvanicum var. laevigatum
pensylvanicum var. rosiflorum
perfoliatum
persicaria
persicaria var. angustifolium
persicaria var. ruderale
persicarioides
puritanorum
sachalinense
sagittatum
sagittatum var. gracilentum
scabrum
scandens
tomentosum
uvifera
zuccarinii
Polypappus sericeus
Polypodium
noveboracense
pellucidum var. vulcanicum
virginianum
vulgare
vulgare var. virginianum
Polypody,
Common (Polypodium virginianum)
Dotted (Polypodium pellucidum var. vulcanicum)
Rock (Polypodium virginianum)
Polypore,
Artist’s (Ganoderma applanatum)
Birch (Piptoporus betulinus)
Black-staining (Meripilus sumstinei)
Cinnabar (Pycnoporus cinnabarinus)
Dyer's (Phaeolus schweinitzii)
Laquered (Ganoderma lucidum)
Red-banded (Fomitopsis pinicola)
Red-belted (Fomitopsis pinicola)
Resinous (Ischnoderma resinosum)
Polyporites igniarius
Polyporus
cinnabarinus
igniarius
igniarius var. nigricans
nigricans
nigricans
squamosus
Polystepha pilulae
Polystichum
acrostichoides
adiantiforme
braunii
braunii ssp. purshii
braunii var. purshii
falcatum
polyblepharum
Polytrichastrum
alpinum var. alpinum
alpinum var. septentrionale
ohioense
Polytrichum
alpinum
alpinum var. brevifolium
alpinum var. campanulatum
alpinum var. macounii
alpinum var. septentrionale
alpinum var. sylvaticum
apiculatum
arcticum
commune
juniperinum
juniperinum var. waghornei
norvegicum
ohioense
Pom Pom Mushroom (Hericium erinaceus)
Pomegranate (Punica granatum)
Pond
Apple (Annona glabra)
Cypress (Taxodium ascendens)
Pondcypress (Taxodium distichum var. imbricarium)
Ponderosa Pine (Pinus ponderosa)
Pondweed, Snail-seed (Potamogeton bicupulatus)
Pontederia
cordata
cordata var. angustifolia
cordata var. lanceolata
cordata var. lancifolia
lanceolata
Ponytail Palm (Beaucarnea recurvata)
Poplar Sunburst Lichen (Xanthomendoza hasseana)
Poplar,
Tulip (Liriodendron tulipifera)
White (Populus grandidentata)
Yellow (Liriodendron tulipifera)
Poppy,
Celandine (Stylophorum diphyllum)
Corn (Papaver rhoeas)
Desert (Eschscholzia glyptosperma)
Desert (Eschscholzia parishii)
Field (Papaver rhoeas)
Flanders (Papaver rhoeas)
Parish's (Eschscholzia parishii)
Red (Papaver rhoeas)
Populus
aurea
cercidiphylla
deltoides
fremontii
grandidentata
grandidentata var. angustata
grandidentata var. meridionalis
grandidentata var. subcordata
tremula ssp. tremuloides
tremuloides
tremuloides var. aurea
tremuloides var. cercidiphylla
tremuloides var. intermedia
tremuloides var. magnifica
tremuloides var. rhomboidea
tremuloides var. vancouveriana
vancouveriana
×polygonifolia
Porcelain Berry (Ampelopsis brevipedunculata)
Porcelain-berry (Ampelopsis brevipedunculata)
Porcupine Tomato (Solanum pyracanthum)
Porecrust, Cinnamon (Phellinus ferruginosus)
Porpidia albocaerulescens
Porsild Spruce (Picea glauca)
Porteranthus
stipulatus
trifoliatus
Porterweed, Blue (Stachytarpheta jamaicensis)
Portulaca
Portulaca (Portulaca)
Portulaca
neglecta
oleracea
oleracea ssp. granulatostellulata
oleracea ssp. impolita
oleracea ssp. nicaraguensis
oleracea ssp. nitida
oleracea ssp. papillatostellulata
oleracea ssp. stellata
portulacastrum
retusa
Portulaca, Wild (Portulaca oleracea)
Portulacaria afra
Possumhaw Viburnum (Viburnum nudum var. cassinoides)
Potamogeton
bicupulatus
diversifolius var. trichophyllus
Potato Bean (Apios americana)
Potato,
Bog (Apios americana)
Duck (Sagittaria latifolia)
Indian (Apios americana)
Indian (Sagittaria latifolia)
Sweet (Ipomoea batatas)
Virginia (Apios americana)
Wild (Apios americana)
Potbelly Air Plant (Tillandsia paucifolia)
Potentilla
Potentilla
anserina
anserina ssp. anserina
anserina var. concolor
anserina var. sericea
anserina var. yukonensis
argentea
canadensis
egedii ssp. yukonensis
floribunda
fruticosa
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