Pennisetum
orientale ‘Karley Rose’
setaceum ‘Rubrum’
Pennsylvania
Pellitory (Parietaria pensylvanica)
Rhododendron (Rhododendron × pennsylvanicum)
Smartweed (Polygonum pensylvanicum)
Penny-cress, Field (Thlaspi arvense)
Pennycress, Field (Thlaspi arvense)
Pennyroyal,
Bastard (Trichostema dichotomum)
Mock (Hedeoma drummondii)
Pennywort,
Virginia (Obolaria virginica)
Water (Hydrocotyle umbellata)
Penstemon (Penstemon heterophyllus ‘Catherine de la Mare’)
Penstemon
bridgesii
bridgesii var. amplexicaulis
centranthifolius
davidsonii
digitalis
fendleri
heterophyllus ‘Catherine de la Mare’
laevigatus ssp. digitalis
laevigatus var. angulatus
palmeri
pinifolius
pseudospectabilis
rostriflorus
virgatus
× gloxinioides
Penstemon ‘Midnight’ (Penstemon × gloxinioides)
Penstemon,
Bridge’s (Penstemon rostriflorus)
Davidson’s (Penstemon davidsonii)
Desert (Penstemon pseudospectabilis)
Fendler’s (Penstemon fendleri)
Palmer’s (Penstemon palmeri)
Pine-needle (Penstemon pinifolius)
Pentaphylloides
floribunda
floribunda
floribunda
fruticosa
Pentas lanceola ‘New Look Rose’
Peony
(Paeonia ‘Bartzella’)
(Paeonia)
Peperomia
floridana
obtusifolia
Pepper
(Capsicum annuum ‘Black Pearl’)
Face Peperomia (Peperomia obtusifolia)
Pepper,
Cayenne (Capsicum annuum)
Ornamental (Capsicum annuum ‘Explosive Ember’)
Pepperbush,
Sweet (Clethra acuminata)
Sweet (Clethra alnifolia ‘Hummingbird’)
Sweet (Clethra alnifolia ‘Ruby Spice’)
Sweet (Clethra alnifolia)
Peppered Moon Lichen (Sticta fuliginosa)
Peppergrass (Lepidium virginicum)
Peppergrass,
Mountain (Lepidium montanum)
Western (Lepidium montanum)
Peppers, Ornamental (Capsicum annuum ‘Filius Blue’)
Peppervine, Amur (Ampelopsis brevipedunculata)
Pepperweed (Cardamine hirsuta)
Pepperweed, Mountain (Lepidium montanum)
Peramium pubescens
Perennial
Glasswort (Sarcocornia perennis)
Lespedeza (Lespedeza cuneata)
Pea (Lathyrus latifolius)
Peavine (Lathyrus latifolius)
Perfoliate Bellwort (Uvularia perfoliata)
Perfumed Passionflower (Passiflora vitifolia)
Perilla (Perilla frutescens var. purpurascens)
Perilla frutescens var. purpurascens
Periphyton [Genus]
Peritoma
serrulata
serrulata
Periwinkle (Vinca minor)
Periwinkle,
Common (Vinca minor)
Madagascar (Catharanthus roseus)
Persian
Shield (Strobilanthes dyerianus)
Silktree (Albizia julibrissin)
Speedwell (Veronica persica)
Persicaria (Polygonum persicaria)
Persicaria
arifolia
bicornis
careyi
hydropiperoides
hydropiperoides var. breviciliata
hydropiperoides var. euronotora
hydropiperoides var. opelousana
incarnata
incarnata
incarnata
lapathifolia
longistyla
maculata
maculosa
mississippiensis
opelousana
paludicola
pensylvanica
pensylvanica var. dura
perfoliata
perfoliata
persicaria
persicaria
persicaria
persicarioides
posumbu
posumbu
puritanorum
puritanorum
ruderalis
ruderalis var. vulgaris
sagittata
tomentosa
vulgaris
Persimmon (Diospyros sp.)
Peruvian Apple (Cereus hildmannianus)
Petalostemon tenuifolius
Petunia [Genus]
Petunia (Petunia)
Petunia,
Purple (Ruellia californica)
Wild (Ruellia californica)
Wild (Ruellia humilis)
Phacelia
Phacelia
campanularia
ciliata
cinerea
crenulata
distans
distans var. australis
Phaeolus schweinitzii
Phaeomeria magnifica
Phaethusa occidentalis
Phalaenopsis [Genus]
Phalaenopsis
sp.
‘Brother Sara Gold’
‘Gold Tris’
‘Talsuco Wonder’ ×
Phallus impudicus
Pharbitis cathartica
Phegopteris hexagonoptera
Phellinus
alni
ferruginosus
igniarius
igniarius
igniarius
igniarius var. alni
igniarius var. igniarius
igniarius var. trivialis
nigricans
trivialis
Phellodon niger
Phenianthus sempervirens
Philadelphus [Genus]
Philadelphus cv. Minnesota
Philodendron
pertusum
spp.
Philodendron ‘Prince of Orange’ (Philodendron spp.)
Phlebia
incarnata
radiata
tremellosa
Phleum
nodosum
pratense
pratense ssp. nodosum
pratense var. nodosum
Phlox
(Phlox subulata cv. ‘Candy Stripe’)
(Phlox subulata)
Phlox
bifida
brittonii
divaricata
paniculata
paniculata ‘Bright Eyes’
paniculata ‘Katerina’
subulata
subulata cv. ‘Candy Stripe’
subulata ssp. brittonii
subulata var. brittonii
Phlox,
Cleft (Phlox bifida)
Garden (Phlox paniculata ‘Katerina’)
Garden (Phlox paniculata)
Louisiana (Phlox divaricata)
Moss (Phlox subulata ssp. brittonii)
Summer (Phlox paniculata ‘Bright Eyes’)
Phlyctis argena
Phoenician Juniper (Juniperus phoenicea)
Phoenicophorium borsigianum
Phoenix dactylifera
Pholiota [Genus]
Pholiota mutabilis
Phoradendron
californicum
californicum var. distans
californicum var. leucocarpum
juniperinum
juniperinum ssp. libocedri
juniperinum var. libocedri
juniperinum var. ligatum
libocedri
ligatum
Phormium tenax ‘Rubra’
Photinia
floribunda
floribunda
×fraseri
Phragmites (Phragmites australis)
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Phragmites
australis
australis var. berlandieri
communis
communis ssp. berlandieri
communis ssp. berlandieri
communis ssp. berlandieri
communis var. berlandieri
phragmites
phragmites
phragmites
Phyllocactus
anguliger
darrahii
russellianus
Phymatosaurus grossus var.
Phymatosorus
grossus
scolopendria
Physalis
crassifolia
elliottii
maritima
virginiana
viscosa ssp. maritima
viscosa var. elliottii
viscosa var. maritima
walteri
Physcia adscendens
Physocarpus
intermedius
opulifolius var. intermedius
Physostegia virginiana
Phytolacca americana
Piaropus crassipes
Picea
abies
abies ‘Pendula’
australis
canadensis
excelsa
glauca
glauca var. albertiana
glauca var. albertiana ‘Conica’
glauca var. densata
glauca var. porsildii
mariana
mariana var. mariana
mariana var. mariana
pungens
pungens cv. Montgomery
pungens f. argentea
pungens var. glauca
pungens ‘Glauca’
rubens
sitchensis
Pickerelweed (Pontederia cordata)
Pickleweed
(Batis maritima)
(Sarcocornia pacifica)
Pieris
Pieris
floribunda f.
japonica
japonica ‘Dorothy Wyckoff’
Pieris,
Japanese (Pieris japonica ‘Dorothy Wyckoff’)
Mountain (Pieris floribunda f.)
Pigeon
Berry (Duranta erecta ‘Aurea Variegata’)
Grass (Setaria pumila)
Plum (Coccoloba diversifolia)
Pigface (Carpobrotus edulis)
Pignut
(Simmondsia chinensis)
Hickory (Carya glabra)
Pigskin Poison Puffball (Scleroderma citrinum)
Pigweed (Amaranthus retroflexus)
Pilea pumila
Pilewort (Ranunculus ficaria)
Pilocereus
pringlei
senilis
Pilosella aurantiaca
Pilosocereus glaucochrous
Pima Rhatany (Krameria erecta)
Pimpernel, Yellow (Taenidia integerrima)
Pincushion
Cactus (Cochemiea setispina)
Plant (Diapensia lapponica)
Protea (Leucospermum cordifolium)
Protea (Leucospermum ‘Hawaii Yellow’)
Pincushion,
Desert (Chaenactis fremontii)
Fremont’s (Chaenactis fremontii)
Pindo Palm (Butia capitata)
Pine
(Pinus)
Spiderwort (Tradescantia pinetorum)
Pine,
Austrian (Pinus nigra ‘Arnold Sentinel’)
Bristlecone (Pinus longaeva)
Buddhist (Podocarpus macrophyllus)
Bull (Pinus ponderosa)
Bull (Pinus taeda)
Bunya-bunya (Araucaria bidwillii)
Cook (Araucaria columnaris)
Cowtail (Cephalotaxus harringtonia)
Jeffrey (Pinus jeffreyi)
Loblolly (Pinus taeda)
Mountain (Pinus pungens)
Norfolk (Araucaria heterophylla)
Oldfield (Pinus taeda)
Pinyon (Pinus edulis)
Pinyon (Pinus monophylla)
Pitch (Pinus rigida)
Ponderosa (Pinus ponderosa)
Red (Pinus resinosa)
Rosemary (Pinus taeda)
Scotch (Pinus sylvestris ‘Hillside Creeper’)
Scotch (Pinus sylvestris)
Scots (Pinus sylvestris)
Slash (Pinus elliottii)
Sugar (Pinus lambertiana)
Torrey (Pinus torreyana)
Urn (Aechmea fasciata)
White (Pinus strobus)
Whitebark (Pinus albicaulis)
Yellow (Pinus ponderosa)
Pine-barren Tick-trefoil (Desmodium strictum)
Pine-needle Penstemon (Penstemon pinifolius)
Pineapple
(Ananas comosus)
Lily (Eucomis vandermerwei)
Lily (Eucomis ‘Sparkling Burgundy’)
Pineapple, Ornamental (Ananas comosus ‘Variegatus’)
Pinedrops, Woodland (Pterospora andromedea)
Pineland
Clustervine (Jacquemontia curtissii)
Heliotrope (Heliotropium polyphyllum)
Threeseed Mercury (Acalypha ostryifolia)
Pinesap (Monotropa hypopitys)
Pineweed (Hypericum gentianoides)
Pinewoods Spiderwort (Tradescantia pinetorum)
Pink
Azalea (Rhododendron periclymenoides)
Clover (Trifolium pratense)
Earth Lichen (Dibaeis baeomyces)
Evening Primrose (Oenothera speciosa)
Fairy Duster (Calliandra eriophylla)
Jasmine (Jasminum polyanthum)
Lady’s Slipper (Cypripedium acaule)
Lotus (Nelumbo nucifera)
Oyster (Pleurotus djamor)
Phalaenopsis Orchids (Phalaenopsis)
Queen (Cleome hassleriana)
Sand Verbena (Abronia umbellata)
Sensitive Briar (Mimosa microphylla)
Silktree (Albizia julibrissin)
Waxcap (Hygrophorus erubescens)
Windmills (Schoenocrambe linearifolia)
Pink,
Deptford (Dianthus armeria)
Fire (Silene virginica)
Indian (Spigelia marilandica)
Maiden (Dianthus deltoides)
Sea (Armeria maritima)
Swamp (Helonias bullata)
Pinkladies (Oenothera speciosa)
Pinkroot, Woodland (Spigelia marilandica)
Pinks (Dianthus)
Pinks, Cheddar (Dianthus ‘Mountain Mist’)
Pinkscale
Blazing Star (Liatris elegans)
Gayfeather (Liatris elegans)
Pino Real (Pinus ponderosa)
Pinus
Pinus
albicaulis
aristata var. longaeva
californiarum
californiarum
cembroides var. edulis
densiflora cv. Umbraculifera
densiflora ‘Low Glow’
densiflora ‘Umbraculifera Compacta’
edulis
edulis var. fallax
edulis var. fallax
elliottii
jeffreyi
lambertiana
longaeva
monophylla
monophylla ssp. californiarum
monophylla ssp. californiarum
monophylla ssp. fallax
monophylla ssp. fallax
monophylla var. californiarum
monophylla var. californiarum
monophylla var. fallax
monophylla var. fallax
monophylla var. monophylla
monophylla var. monophylla
nigra ‘Arnold Sentinel’
ponderosa
ponderosa
ponderosa ssp. jeffreyi
ponderosa ssp. jeffreyi
ponderosa ssp. jeffreyi
pungens
resinosa
rigida
strobus
sylvestris
sylvestris ‘Hillside Creeper’
taeda
torreyana
Pinxter Flower (Rhododendron periclymenoides)
Pinyon
Pine (Pinus edulis)
Pine (Pinus monophylla)
Pinyon, Two-needle (Pinus edulis)
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