| P |
| Pachysandra, Pachysandra terminalis |
| Pacific maidenhair; Maidenhair fern; Delta maidenhair, Adiantum raddianum |
| Painted Damask rose, Rosa 'Painted Damask' |
| Painted tongue, Salpiglossis sinuata |
| Pallida rose, Rosa 'Pallida' |
| Palm sedge, Carex muskingumensis |
| Palm, Cabbage, Sabal palmetto |
| Palm, Needle, Rhapidiophyllum hystrix |
| Palm, Windmill, Trachycarpus fortunei |
| Palmetto, Dwarf; Swamp palmetto, Sabal minor |
| Pam's Pink rose, Rosa 'Pam's Pink' |
| Pamela water lily, Nymphaea 'Pamela' |
| Pampas grass, Cortaderia selloana |
| Panache rose, Rosa 'POULtop' |
| Panama Pacific water lily, Nymphaea 'Panama Pacific' |
| Pandora vine, Pandorea pandorana |
| Pansy, Viola x wittrockiana |
| Paper flower, Bougainivillea spectabilis |
| Paprika, Rosa 'TANprik' |
| Papyrus, Dwarf, Cyperus prolifer (Cyperus isocladus) |
| Papyrus, Giant, Cyperus papyrus |
| Paradise rose, Rosa 'WEzip'; Rosa 'WEzeip' |
| Paris Pink rose, Rosa 'AROdousna' |
| Parrot feather, Myriophyllum aquaticum |
| Parsley, Petroselinum crispum |
| Parsnip, Meadow; Golden Alexander, Zizia trifoliate |
| Parson's Pink rose, Rosa 'Parson's Pink' |
| Partridge berry; Twinberry, Mitchella repens |
| Partridge pea; Senna, Cassia fasciculata (Chamaecrista fasciculata) |
| Parvifolia rose, Rosa centifolia parvifolia; Rosa burgundica |
| Pascali rose, Rosa 'LENip' |
| Pasque flower; Wind flower; Meadow anemone, Anemone pulsatilla |
| Passion flower; Maypops, Passiflora incarnata |
| Passion rose, Rosa 'Passion' |
| Pasture rose, Rosa carolina |
| Paul Neyron rose, Rosa 'Paul Neyron' |
| Pawpaw, Asimina triloba |
| Peace rose, Rosa 'Peace' |
| Peach, Corinthian, Prunus persica Corinthian hybrids |
| Peach, Prunus persica |
| Peachglow water lily, Nymphaea 'Peachglow' |
| Peacock flower, Moraea |
| Peacock moss, Selaginella uncinata |
| Pear, Callery, Pyrus calleryana |
| Pear, Chinese sand, Pyrus pyrifolia |
| Pearl Essence rose, Rosa 'JACsiho' |
| Pearlbush, Common, Exochorda racemosa |
| Pearlbush, Redbud, Exochorda giraldii |
| Pearlbush, The Bride, Exochorda x macrantha 'The Bride' |
| Pearly everlasting, Anaphalis spp. |
| Peashrub, Chinese, Caragana sinica |
| Peaudounce rose, Rosa 'DICjana' |
| Pecan, Carya illinoinensis |
| Pekin willow, Salix matsudana 'Scarlet Curles' |
| Pencil flower, Stylosanthes biflora |
| Penelope rose, Rosa 'Penelope' |
| Pennants, Chasmanthe |
| Pennywort, Marsh, Hydrocotyle umbellate |
| Penstemon, Penstemon canascens |
| Pentas, Pentas lanceolata |
| Peony, Paeonia hybrids |
| Pepper vine, Ampelopsis arborea |
| Pepper, Ornamental, Capsicum annuum |
| Pepperbush, Mountain, Clethra acuminata |
| Pepperbush, Sweet, Clethra alnifolia |
| Peppermint, Mentha x piperita |
| Perdita rose, Rosa 'AUSperd' |
| Perennial pea, Lathyrus latifolius |
| Perfect Moment rose, Rosa 'KORwilma' |
| Perfume Delight rose, Rosa 'Perfume Delight' |
| Perilla, Perilla frutescens |
| Periwinkle, Big leaf, Vinca major |
| Periwinkle, Madagascar, Catharanthus roseus |
| Periwinkle, Vinca minor |
| Periwinkle; Dwarf periwinkle, Vinca minor |
| Permanent Wave rose, Rosa 'Permanent Wave' |
| Perry's Baby Red water lily, Nymphaea 'Perry's Baby Red' |
| Perry's Fire Opal water lily, Nymphaea 'Perry's Fire Opal' |
| Perry's Red Wonder water lily, Nymphaea 'Perry's Red Wonder' |
| Persian buttercup, Ranunculus |
| Persian parrotia, Parrotia persica |
| Persian shield, Strobilanthes dyerianus |
| Persian violet, Cyclamen |
| Persimmon, Diospyros virginiana |
| Persimmon, Japanese, Diospyros khaki |
| Peter Slocum water lily, Nymphaea 'Peter Slocum' |
| Petite Pink Scotch rose, Rosa 'Petite Pink Scotch' |
| Petunia, Petunia x hybrida |
| Petunia, Trailing, Calibrachoa xhybrida |
| Phacelia, Purple; Loose-flowered phacelia, Phacelia bipinnatifida |
| Phlox, Blue, Phlox divaricata |
| Phlox, Carolina, Phlox carolina |
| Phlox, Creeping, Phlox stolonifera |
| Phlox, Fall, Phlox paniculata |
| Phlox, Phlox spp. |
| Phlox, Smooth; Appalachian smooth phlox, Marsh phlox, Phlox glaberrima |
| Photinia, Chinese, Photinia davidiana |
| Photinia, Chinese, Photinia serrulata |
| Photinia, Fraser, Photinia x fraseri |
| Photinia, Japanese, Photinia glabra |
| Photinia, Oriental, Photinia serrulata |
| Photinia, Oriental, Photinia villosa |
| Pickerel weed, Pontederia cordata |
| Pickerel weed, Pontederia cordata |
| Pickerel weed, White, Pontederia cordata alba |
| Pieris, Bent Chandler, Pieris x 'Bent Chandler' |
| Pieris, Brouwer's Beauty, Pieris x 'Brouwer's Beauty' |
| Pieris, Himalayan, Pieris formosa |
| Pieris, Himalayan, Pieris formosa var. forrestii |
| Pieris, Japanese, Pieris japonica |
| Pieris, Mountain, Pieris floribunda |
| Pigon berry, Duranta erecta |
| Pilgrim rose, Rosa 'Pilgrim' |
| Pincushion flower, Scabiosa caucasica |
| Pine, Albyns Scotch, Pinus sylvestris 'Albyns' |
| Pine, Arolla, Pinus cembra |
| Pine, Austrian, Pinus nigra |
| Pine, Balen, Pinus peucea |
| Pine, Bosian, Pinus korariensis |
| Pine, Bosnian, Pinus heldreichii |
| Pine, Bristlecone, Pinus aristata |
| Pine, Butan, Pinus wallichiana |
| Pine, Cluster, Pinus piaster |
| Pine, David's, Pinus armandii |
| Pine, Dragon's-eye, Pinus densiflora 'Oculusdraconis' |
| Pine, Dwarf blue Scotch, Pinus sylvestris 'Glauca Nana' |
| Pine, Dwarf eastern white, Pinus strobus 'Nana' |
| Pine, Dwarf loblolly, Pinus taeda 'Dixie', 'Nana' |
| Pine, Dwarf Scotch, Pinus sylvestris 'Nana' |
| Pine, Dwarf Swiss mountain; Little mugo pine, Pinus mugo var. pumilio |
| Pine, Eastern white, Pinus strobus |
| Pine, Heldreich, Pinus heldreichii var. leucodermis |
| Pine, Hillside Creeper, Pinus sylvestris 'Hillside Creeper' |
| Pine, Himalayan, Pinus wallichiana |
| Pine, Jack, Pinus banksiana |
| Pine, Japanese black, Pinus thunbergiana |
| Pine, Japanese red, Pinus densifolia |
| Pine, Japanese umbrella, Sciadopitys verticillata |
| Pine, Japanese white, Pinus parviflora |
| Pine, Korean, Pinus korariensis |
| Pine, Lacebark, Pinus bungeana |
| Pine, Limber, Pinus flexilis |
| Pine, Loblolly, Pinus taeda |
| Pine, Longleaf, Pinus palustris |
| Pine, Macedonian, Pinus peucea |
| Pine, Maritime, Pinus piaster |
| Pine, Mops mugo, Pinus mugo 'Mops' |
| Pine, Mugo, Pinus mugo |
| Pine, Ontario white, Pinus strobus 'Ontario' |
| Pine, Pitch, Pinus rigida |
| Pine, Pond, Pinus serotina |
| Pine, Ponderosa, Pinus ponderosa |
| Pine, Ponderosa, Pinus ponderosa (var. scopulorum) |
| Pine, Radiata white, Pinus strobus 'Raidata' |
| Pine, Scotch, Pinus sylvestris |
| Pine, Shortleaf, Pinus echinata |
| Pine, Slash, Pinus elliottii |
| Pine, Spruce, Pinus glabra |
| Pine, Swiss mountain, Pinus mugo |
| Pine, Swiss stone, Pinus cembra |
| Pine, Thunderhead, Pinus thunbergiana 'Thunderhead' |
| Pine, Umbrella, Sciadopitys verticillata |
| Pine, Virginia, Pinus virginiana |
| Pine, Walter's, Pinus glabra |
| Pine, Walter's, Pinus sylvestris 'Watereri' |
| Pine, Weeping Japanese red, Pinus densiflora 'Pendula' |
| Pine, Weeping white, Pinus strobus 'Pendula' |
| Pine, Western white, Pinus monticola |
| Pine, Western yellow, Pinus ponderosa |
| Pine, Yunnan, Pinus yunnanensis |
| Pinesap, Monotropa spp. |
| Pinesap; Indian-pipe, Monotropa spp. |
| Pink Cherokee rose, Rosa laevigata 'Anemone' |
| Pink Cover and Aquatine rose, Rosa 'POULnoz' |
| Pink Grootendoorst rose, Rosa 'Pink Grootendoorst' |
| Pink Meidiland rose, Rosa 'MELpoque' |
| Pink Opal water lily, Nymphaea 'Pink Opal' |
| Pink Peace rose, Rosa 'MELbil' |
| Pink Platter water lily, Nymphaea 'Pink Platter' |
| Pink Prosperity rose, Rosa 'Pink Prosperity' |
| Pink Sensation water lily, Nymphaea 'Pink Sensation' |
| Pink, Deptford, Dianthus armeria |
| Pink, Fire; Indian pink, Silene virginica |
| Pink, Grass, Calopogon pulchellus |
| Pink, Grass; Calopogon, Arethusa bulbosa |
| Pink, Indian, Spigelia marilandica |
| Pink, Maiden, Dianthus deltoides |
| Pink, Moss; Thrift, Phlox subulata |
| Pink, Sea; Common thrift; Maritime thrift, Armeria martima |
| Pinks, Dianthus chinensis |
| Pinks, Dianthus spp. |
| Pinks; Dianthus, Dianthus plumarius |
| Pinocchio rose, Rosa 'SUNpino' |
| Pinxter flower, Rhododendron canescens |
| Pipewort; Hatpins, Eriocaulon compressum |
| Pistache, Chinese, Pistacia chinensis |
| Pitcher plant, Sarracenia spp. |
| Pitcher plant, Sarracenia
spp. jonesi |
| Pitcher plant, Crimson, Sarracenia
drummondii = S. leucophyla |
| Pitcher plant, Hooded, Sarracenia
minor |
| Pitcher plant, Parrot, Sarracenia
psittacina |
| Pitcher plant, Purple, Sarracenia
purpurea |
| Pitcher plant, Red; Miniature huntsman
horn, Sarracenia rubra |
| Pitcher plant, Sweet; Yellow trumpets,
Sarracenia alata |
| Pitcher plant, Yellow, Sarracenia
flava |
| Pittosporum, Japanese, Pittosporum tobira |
| Planetree, London, Platnus x acerifolia |
| Planetree, Oriental, Platanus orientalis (var. digitata) |
| Plantain, Pale Indian, Cacalia atriplicifolia |
| Plantain, Rattlesnake; Downy rattlesnake plantain, Goodyera pubescens |
| Playboy rose, Rosa 'Playboy' |
| Playgirl rose, Rosa 'MORplag' |
| Pleasure rose, Rosa 'JACpif' |
| Pleated leaves, Curtonus |
| Plectranthus, Silver, Plectranthus argentatus |
| Plum, American; Wild plum, Prunus americana |
| Plum, Blireiana, Prunus x bilireana |
| Plum, Chickasaw, Prunus angustifolia |
| Plum, Purple leaf, Prunus cerasifera |
| Plum, Wild, Prunus americana |
| Plumbago, Dwarf; Leadwort, Ceratostigma plumbaginoides |
| Pocketbook plant, Calceolaria crenatiflora |
| Podocarpus, Shrubby, Podocarpus macrophyllus var. maki |
| Poesie rose, Rosa 'LENobit' |
| Pogonia, Large whorled, Isotria verticillata |
| Pogonia, Rose; Rose crested orchid, Pogonia ophioglossoides |
| Poinsettia tree, Pinckneya braceata |
| Poke; Pokeweed, Phytolacca americana |
| Polar Star rose, Rosa 'Polar Star' |
| Polarstern rose, Rosa 'TANlarpost' |
| Polastern rose, Rosa 'Polar Star' |
| Poliothyrsis, Poliothyrsis sinensis |
| Polka dot plant, Hypoestes phyllostachya |
| Polyatha Grandiflora rose, Rosa polyatha 'Grandiflora' |
| Polygala; Curtiss' Milkwort, Polygala curtissii |
| Pomegranate, Punica granatum |
| Pompom des Princess rose, Rosa 'Pompom des Princess' |
| Pompon rose, Rosa 'Pompom des Princess' |
| Poplar, Eastern, Populus deltoides |
| Poplar, Lombardy, Populus nigra |
| Poplar, Tulip, Liriodendron tulipifer |
| Poplar, White, Populus alba |
| Poplar, Yellow, Liriodendron tulipifer |
| Poppy, Celandine; Yellow wood poppy, Stylophorum diphyllum |
| Poppy, Opium, Papaver somniferum |
| Poppy, Papaver spp. |
| Porcelain vine, Ampelopsis brevipedunculata |
| Porcupine grass, Miscanthus sinensis 'Strictus' |
| Portulaca, Portulaca grandiflora |
| Possumhaw, Ilex decidua |
| Pot marigold, Calendula officinilalis |
| Potato vine, Solanum jasminoides |
| Potato vine, Wild, Ipomoea pandurata |
| Potentilla, Shrubby, Potentilla fruticosa |
| Potentilla, Shrubby; Shrubby cinquefoil, Potentilla fruticosa |
| Pouch nemseia, Nemesia strumosa |
| Pourpre rose, Rosa 'Gallica Officinalis' |
| Prairie cord grass, Spartina pectinata |
| Prairie droopseed, Sporobolus heterolepisis |
| President JF Kennedy rose, Rosa 'John F. Kennedy' |
| Pretty face, Brodiaea = Triteleia |
| Pretty Face, Brodiaea laxa (Triteleia) |
| Prickly water lily; Gorgon plant, Euryale ferox |
| Prima Donna rose, Rosa 'Prima Donna' |
| Prima rose, Rosa 'HARwanted' |
| Primrose willow, Ludwigia longifolia |
| Primrose, Cowslip, Primula veris |
| Primrose, Evening, Oenothera biennis |
| Primrose, Primula x polyantha |
| Primrose, Showy evening, Oenothera speciosa |
| Princesse de Monaco rose, Rosa 'MELmagarmic' |
| Pristine rose, Rosa 'JACpico' |
| Privet, Chinese, Ligustrum sinense |
| Privet, Glossy, Ligustrum lucidum |
| Privet, Golden, Ligustrum x vicaryi |
| Privet, Japanese, Ligustrum japonicum |
| Privet, Vicary golden, Ligustrum x vicaryi |
| Privet, Waxleaf, Ligustrum lucidum |
| Probuzini rose, Rosa 'Probuzini' |
| Prosperity rose, Rosa 'Prosperity' |
| Proud Land rose, Rosa 'Proud Land' |
| Psyche rose, Rosa 'Psyche' |
| Pteracanth rose, Rosa 'Pteracanth' |
| Purple bell vine, Rhodochiton atrosanguineus |
| Purple cone-flower, Echinacea purpurea |
| Purple dead-nettle, Lamium purpureum |
| Purple fountain grass; Dwarf red fountain grass, Pennisetum setaceum; P. macrostachynum |
| Purple heart; Wandering Jew, Setcreasea pallida 'Purple Heart' |
| Purple love grass; Tumble grass, Eragrostrum spectablis |
| Purple moor grass, Molina caerulea |
| Purple Pavement rose, Rosa 'Purple Pavement' |
| Purple Puff rose, Rosa 'Purple Puff' |
| Purple Simplicity rose, Rosa 'JACpursh' |
| Purpleflowering raspberry, Rubus odoratus |
| Purpleosier; Basket willow, Salix purpurea |
| Pussy willow, Salix caprea |
| Pussy-toes, Antennaria solitaria |
| Pussytoes, Antennaria dioica |
| Pussywillow, European, Salix caprea |
| Pussywillow, Japanese, Salix chaenomeloides |
| Pussywillow, Salix discolor |
| Puttyroot, Aplectrum hyemale |
| Pyracantha, Formosa, Pyracantha koidzumii |
| Pyracantha, Mohave, Pyracantha 'Mohave' |
| Pyrethrum, Pyrethrum roseum = C. coccineum |
| Pyrola, Round-leafed, Pyrola rotundifolia |
| Ribbon grass, Phalaris arundarinacea |