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Scientific Name List

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Your search returned 841 results.
Pachira aquatica  - Guiana chestnut
Pachira aquatica 'Lemon Blush'  - water chestnut
Pachypodium rutenbergianum  - pachypodium
Pachyrhizus erosus  - jicama
Pachysandra procumbens  - Allegheny spurge
Pachysandra terminalis  - Japanese pachysandra
Pachysandra terminalis 'Green Carpet'  - Japanese pachysandra
Pachysandra terminalis 'Green Sheen'  - Japanese pachysandra
Pachystachys coccinea  - cardinal's guard
Pachystachys lutea  - golden shrimp plant
Packera aurea  - golden ragwort
Packera aurea 'Dark Shadows'  - golden ragwort
Packera obovata  - round-leaved ragwort
Paeonia 'America'  - peony
Paeonia 'Goldfinch'  - tree peony
Paeonia 'Itopa Shakuyaki'  - fernleaf peony
Paeonia japonica  - peony
Paeonia 'Kronos'  - tree peony
Paeonia obovata  - obovate peony
Paeonia officinalis  - common peony
Paeonia suffruticosa  - tree peony
Paeonia 'Summer Night'  - tree peony
Paeonia 'Tessera'  - peony
Paeonia 'Themis'  - tree peony
Panax quinquefolius  - American ginseng
Pandanus tectorius  - screw pine
Panicum amarum 'Dewey Blue'  - bitter switchgrass
Panicum bulbosum  - panic grass
Panicum 'Huron Solstice'  - switch grass
Panicum miliaceum  - proso millet
Panicum 'Prairie Fire'  - switch grass
Panicum virgatum  - switch grass
Panicum virgatum 'Badlands'  - switch grass
Panicum virgatum 'Northwind'  - switch grass   ( POM )
Panicum virgatum 'Rehbraun'  - switch grass
Panicum virgatum 'Squaw'  - switch grass
Papaver alpinum  - poppy
Papaver orientale 'Allegro'  - oriental poppy
Papaver orientale 'Fatima'  - oriental poppy
Papaver rhoeas  - corn poppy
Paphiopedilum (group)  - Venus' slipper
Parrotia persica  - Persian ironwood   ( POM )
Parthenium hispidum  - American feverfew
Parthenium integrifolium  - wild quinine
Parthenocissus quinquefolia  - Virginia creeper
Paspalum floridanum  - Florida paspalum
Passiflora caerulea  - blue passionflower
Passiflora coccinea  - red passion flower
Passiflora edulis  - purple granadilla
Passiflora incarnata  - purple passionflower
Passiflora incarnata 'Alba'  - passion flower
Passiflora 'Incense'  - passion flower
Passiflora 'Violet Ray'  - passion flower
Patrinia gibbosa  - patrinia
Patrinia villosa  - patrinia
Paulownia tomentosa  - princess tree
Pavonia cymbalaria  - pavonia
Paxistima canbyi  - cliff green
Pedicularis canadensis  - common lousewort
Pedilanthus tithymaloides  - redbird flower
Pelargonium × domesticum  - regal geranium
Pelargonium × hortorum  - zonal geranium
Pelargonium peltatum  - ivyleaf geranium
Pelargonium (scented-leaved group)  - scented-leaved geranium
Pellaea rotundifolia  - button fern
Pellionia repens  - trailing watermelon begonia
Peltandra virginica  - green arrow arum
Peltoboykinia watanabei  - peltoboykinia
Pennisetum alopecuroides  - fountain grass
Pennisetum 'First Knight'  - fountain grass
Pennisetum macrourum  - African feather grass
Pennisetum orientale 'Karley Rose'  - oriental fountain grass
Pennisetum orientale 'Tall Tails'  - fountain grass   ( POM )
Pennisetum purpureum  - elephant grass
Pennisetum purpureum 'Prince'  - elephant grass
Pennisetum setaceum  - crimson fountaingrass
Pennisetum setaceum 'Rubrum'  - fountain grass
Penstemon barbatus  - bearded penstemon
Penstemon barbatus 'Elfin Pink'  - bearded penstemon
Penstemon barbatus 'Jingle Bells'  - bearded penstemon
Penstemon barbatus subsp. coccineus  - bearded penstemon
Penstemon caespitosus  - beardtongue
Penstemon campanulatus  - bellflower beardtongue
Penstemon canescens  - beardtongue
Penstemon cobaea  - dew flower
Penstemon 'Czar'  - beardtongue
Penstemon 'Dark Towers'  - beardtongue
Penstemon digitalis  - beardtongue
Penstemon grandiflorus  - large beardtongue
Penstemon pallidus  - pale beardtongue
Penstemon pinifolius 'Mersea Yellow'  - pine-leaved penstemon
Penstemon 'Prairie Fire'  - beardtongue
Penstemon 'Red Rocks'  - beardtongue
Penstemon 'Sweet Joanne'  - beardtongue
Penstemon tubaeflorus  - White wand beardtongue
Penstemon 'Welsh Dawn'  - beardtongue
Pentas lanceolata  - Egyptian star flower   ( POM )
Peperomia argyreia  - watermelon begonia
Peperomia caperata  - emerald ripple pepper
Peperomia obtusifolia  - baby rubber plant
Pereskia grandifolia  - rose cactus
Pericallis × hybrida  - florist's cineraria
Perilla frutescens  - beefsteak plant
Perilla 'Magilla'  - perilla
Perovskia atriplicifolia  - Russian sage   ( POM )
Perovskia 'Blue Spire'  - perovskia
Perovskia 'Filigran'  - Russian sage
Perovskia 'Longin'  - Russian sage
Persea americana  - avocado
Persicaria odorata  - Asian mint
Persicaria polymorpha  - knotweed
Persicaria virginiana  - knotweed
Petasites japonicus  - butterbur
Petrea volubilis  - queen's wreath
Petrorhagia saxifraga  - petrorhagia
Petroselinum crispum  - parsley   ( POM )
Petunia (group)  - petunia
Phaius (group)  - orchid
Phalaenopsis (group)  - moth orchid
Phalaris arundinacea  - reed canary grass
Phaseolus coccineus  - snap bean
Phedimus ellacombianus  - stonecrop
Phegopteris connectilis  - beech fern
Phegopteris hexagonoptera  - broad beech fern
Phellodendron amurense  - Amur cork tree
Phellodendron amurense 'Macho'  - Amur cork tree
Phemeranthus calycinus  - fameflower
Philadelphus 'Avalanche'  - mock orange
Philadelphus 'Innocence'  - mock orange
Philadelphus pekinensis  - mock orange
Philadelphus pubescens  - broad-leaf mock orange
Philadelphus schrenkii  - mock orange
Philadelphus 'Snow Dwarf'  - mock orange
Philadelphus 'Snow Velvet'  - mock orange
Philadelphus 'Snowbelle'  - mock orange
Philadelphus 'Virginal'  - mock orange
Philadelphus × virginalis  - mock orange
Philodendron bipinnatifidum  - horsehead philodendron
Phlomis fruticosa  - Jerusalem sage
Phlomis longifolia  - phlomis
Phlomis russeliana  - turkish sage
Phlomis tuberosa  - sage-leaf mullein
Phlox bifida  - sand phlox
Phlox divaricata  - wild sweet William
Phlox divaricata 'Fuller's White'  - wild sweet William
Phlox divaricata subsp. laphamii  - wild sweet William
Phlox drummondii  - phlox
Phlox glaberrima  - smooth phlox
Phlox maculata  - spotted phlox
Phlox maculata 'Natascha'  - wild sweet William
Phlox paniculata  - garden phlox
Phlox paniculata 'David'  - garden phlox
Phlox paniculata f. alba  - garden phlox
Phlox paniculata 'Jeana'  - garden phlox
Phlox paniculata 'Laura'  - garden phlox
Phlox paniculata 'Robert Poore'  - garden phlox   ( POM )
Phlox paniculata 'Starfire'  - garden phlox
Phlox pilosa  - prairie phlox
Phlox stolonifera  - creeping phlox
Phlox subulata  - moss phlox
Phoenix canariensis  - Canary Island date palm
Phormium tenax  - New Zealand flax
Photinia beauverdiana  - Christmas berry
Photinia × fraseri  - Fraser photinia
Photinia × fraseri 'Red Robin'  - Fraser photinia
Photinia serratifolia  - Chinese hawthorn
Photinia villosa  - Christmas berry
Phuopsis stylosa  - large-styled crosswort
Phygelius aequalis  - phygelius
Phygelius 'Lemon Spritzer'  - Cape fuchsia
Phyllanthus fluitans  - floating spurge
Phyllostachys aureosulcata  - yellow groove bamboo
Phyllostachys edulis  - moso bamboo
Phymatosorus diversifolius  - kangaroo fern
Physalis alkekengi  - Chinese lantern
Physalis ixocarpa  - tomatillo
Physocarpus opulifolius  - ninebark   ( POM )
Physostegia angustifolia  - obedient plant
Physostegia virginiana  - obedient plant
Physostegia virginiana 'Alba'  - obedient plant
Physostegia virginiana 'Vivid'  - obedient plant
Phytolacca americana  - pokeweed
Picea abies  - Norway spruce   ( POM )
Picea abies 'Acrocona'  - Norway spruce   ( POM )
Picea abies 'Elegans'  - dwarf Norway spruce
Picea abies 'Formanek'  - Norway spruce
Picea abies 'Gregoryana'  - Norway spruce
Picea abies 'Humphrey's Gem'  - dwarf Norway spruce
Picea abies 'Inversa'  - dwarf Norway spruce
Picea abies 'Little Gem'  - Norway spruce   ( POM )
Picea abies 'Little Joe'  - Norway spruce
Picea abies 'Maxwellii'  - Norway spruce
Picea abies 'Nidiformis'  - Norway spruce
Picea abies 'Parsoni'  - Norway spruce
Picea abies 'Pendula'  - Norway spruce
Picea abies 'Pumila'  - Norway spruce
Picea abies 'Virgata'  - snake fir
Picea abies 'Weeping Blue'  - Norway spruce
Picea abies 'Witch's Brood'  - Norway spruce
Picea bicolor 'Howell's Dwarf'  - Alcock's spruce
Picea breweriana  - brewer's spruce
Picea engelmannii  - Engelmann spruce
Picea glauca  - white spruce
Picea glauca 'Cecilia'  - white spruce
Picea glauca 'Conica'  - white spruce
Picea glauca 'Densata'  - white spruce
Picea glauca 'Echiniformis'  - white spruce
Picea glauca JEAN'S DILLY  - white spruce
Picea glauca 'Little Globe'  - white spruce
Picea glauca 'Pendula'  - white spruce
Picea glehnii  - Sakhalin spruce
Picea glehnii 'Yatsubusa'  - Sakhalin spruce
Picea jezoensis  - yezo spruce
Picea likiangensis  - luiang spruce
Picea mariana 'Nana'  - black spruce
Picea omorika  - Serbian spruce
Picea omorika 'De Ruyter'  - Serbian spruce
Picea omorika 'Nana'  - Serbian spruce
Picea orientalis 'Bergman's Gem'  - oriental spruce
Picea orientalis 'Compacta'  - oriental spruce
Picea orientalis 'Gowdy'  - oriental spruce
Picea orientalis 'Instar'  - oriental spruce
Picea orientalis 'Pendula'  - oriental spruce
Picea orientalis 'Skylands'  - oriental spruce
Picea pungens  - Colorado spruce
Picea pungens 'Baby Blueeyes'  - Colorado spruce
Picea pungens 'Bacheri'  - Colorado spruce
Picea pungens 'Colonial Gold'  - Colorado spruce
Picea pungens 'Corbet'  - Colorado spruce
Picea pungens 'Fat Albert'  - Colorado spruce   ( POM )
Picea pungens 'Foxtail'  - Colorado spruce
Picea pungens 'Glauca Globosa'  - Colorado spruce
Picea pungens 'Glauca Prostrata'  - Colorado spruce
Picea pungens 'Globe'  - Colorado spruce
Picea pungens 'Hoopsii'  - Colorado spruce
Picea pungens 'Montgomery'  - Colorado spruce
Picea pungens 'Pendula'  - Colorado spruce
Picea pungens 'Thuem'  - Colorado spruce
Picea pungens 'Thume'  - Colorado spruce
Picea pungens 'Walnut Glen'  - Colorado spruce
Picea smithiana  - morinda spruce
Pieris 'Forest Flame'  - lily of the valley bush
Pieris japonica  - Japanese pieris
Pieris japonica 'Mountain Fire'  - Japanese pieris
Pieris japonica 'Nocturne'  - Japanese pieris
Pieris japonica 'Prelude'  - Japanese pieris
Pieris japonica 'Red Mill'  - Japanese pieris
Pieris japonica 'Shojo'  - Japanese pieris
Pilea cadierei  - aluminum plant
Pilea involucrata  - friendship plant
Pilea microphylla  - artillery plant
Piloblephis rigida  - wild pennyroyal
Pimenta dioica  - allspice
Pimpinella major  - greater burnet
Pimpinella major 'Rosea'  - greater burnet
Pinellia pedatisecta  - pinellia
Pinellia tripartita  - green dragon
Pinus banksiana  - jack pine
Pinus bungeana  - lacebark pine   ( POM )
Pinus cembra  - Swiss stone pine
Pinus cembra 'Chalet'  - Swiss stone pine
Pinus cembra 'Glauca'  - Swiss stone pine
Pinus densiflora  - Japanese red pine
Pinus densiflora 'Alice Verkade'  - Japanese red pine
Pinus densiflora 'Globosa'  - Japanese red pine
Pinus densiflora 'Jane Kluis'  - Japanese red pine
Pinus densiflora 'Low Glow'  - Japanese red pine
Pinus densiflora 'Pendula'  - Japanese red pine
Pinus densiflora 'Umbraculifera'  - Japanese red pine
Pinus echinata  - short-leaf pine
Pinus fenzeliana  - Hainan white pine
Pinus flexilis  - limber pine
Pinus heldreichii  - Bosnian pine
Pinus jeffreyi  - Jeffrey's pine
Pinus koraiensis  - Korean pine
Pinus montezumae  - Montezuma pine
Pinus mugo  - mugo pine
Pinus mugo 'Allen'  - dwarf mountain pine
Pinus mugo 'Aurea'  - mugo pine
Pinus mugo 'Mops'  - dwarf mountain pine
Pinus mugo 'Paul's Dwarf'  - dwarf mountain pine
Pinus mugo 'Teeny'  - dwarf mountain pine
Pinus mugo 'Valley Cushion'  - dwarf mountain pine
Pinus mugo var. pumilio  - dwarf mountain pine
Pinus nigra  - Austrian pine
Pinus nigra 'Hornibrookiana'  - Austrian pine
Pinus parviflora  - Japanese white pine
Pinus parviflora 'Adcock's Dwarf'  - Japanese white pine
Pinus parviflora 'Bergman'  - Japanese white pine
Pinus parviflora 'Blue Wave'  - Japanese white pine
Pinus parviflora (Glauca Group)  - Japanese white pine
Pinus parviflora 'Glauca Nana'  - Japanese white pine
Pinus parviflora 'Venus'  - Japanese white pine
Pinus pinea  - stone pine
Pinus ponderosa  - ponderosa pine
Pinus pumila  - dwarf Siberian pine
Pinus pumila 'Compacta'  - dwarf Siberian pine
Pinus pumila 'Dwarf Blue'  - dwarf Siberian pine
Pinus resinosa  - red pine
Pinus strobiformis 'Coronado'  - southwestern white pine
Pinus strobus  - eastern white pine
Pinus strobus 'Blue Shag'  - eastern white pine
Pinus strobus 'Brevifolia Densa'  - eastern white pine
Pinus strobus 'Contorta'  - eastern white pine
Pinus strobus 'Fastigiata'  - eastern white pine
Pinus strobus 'Hillside Winter Gold'  - eastern white pine
Pinus strobus 'Horsford'  - eastern white pine
Pinus strobus 'Macopin'  - eastern white pine
Pinus strobus (Nana Group)  - eastern white pine
Pinus strobus 'Paul Waxman'  - eastern white pine
Pinus strobus 'Pendula'  - eastern white pine
Pinus strobus 'Sea Urchin'  - eastern white pine   ( POM )
Pinus sylvestris  - Scotch pine
Pinus sylvestris 'Aurea'  - golden Scotch pine
Pinus sylvestris 'Repens'  - Scotch pine
Pinus tabuliformis  - Chinese pine
Pinus tabuliformis var. mukdensis  - Chinese red pine
Pinus taeda  - loblolly pine
Pinus thunbergii  - Japanese black pine
Pinus thunbergii 'Banshosho'  - Japanese black pine
Pinus thunbergii 'Mia Kujaku'  - Japanese black pine
Pinus thunbergii 'Pygmaea'  - Japanese black pine
Pinus wallichiana  - Himalayan pine
Piper nigrum  - common pepper
Pisonia grandis  - bird-catcher tree
Pistacia chinensis  - Chinese pistache
Pistia stratiotes  - water lettuce
Pisum sativum  - garden pea
Pittosporum 'Garnettii'  - pittosporum
Pittosporum illicioides  - pittosporum
Pittosporum tobira  - Japanese pittosporum
Pittosporum tobira 'Variegatum'  - Japanese pittosporum
Platanus × acerifolia  - London plane tree
Platanus occidentalis  - American sycamore
Platanus orientalis  - oriental plane tree
Platycarya strobilacea  - platycarya
Platycerium bifurcatum  - elkhorn fern
Platycladus orientalis  - oriental arborvitae
Platycladus orientalis 'Aurea Nana'  - oriental arborvitae
Platycladus orientalis 'Collen's Gold'  - oriental arborvitae
Platycladus orientalis 'Elegantissima'  - oriental arborvitae
Platycladus orientalis 'Westmont'  - Chinese arborvitae
Platycodon grandiflorus  - balloon flower
Plectranthus argentatus  - silver spurflower
Plectranthus argentatus 'Silver Shield'  - silver spurflower   ( POM )
Plectranthus australis  - Swedish ivy
Plectranthus strigosus  - Swedish ivy
Plectranthus 'Uf0646' REDHEAD  - coleus   ( POM )
Pleioblastus pygmaeus  - dwarf fern-leaf bamboo
Plinia cauliflora  - jaboticaba
Plumbago auriculata  - Cape leadwort
Plumeria alba  - West Indian jasmine
Plumeria obtusa  - Singapore graveyard flower
Plumeria rubra  - templetree
Poa pratensis (group)  - Kentucky bluegrass
Poa trivialis  - rough meadow grass
Podocarpus macrophyllus  - yew plum pine
Podophyllum peltatum  - may-apple
Polemonium caeruleum  - Jacob's ladder
Polemonium 'Heaven Scent'  - Jacob's ladder
Polemonium 'Lace Towers'  - Jacob's ladder
Polemonium reptans  - Jacob's ladder
Polianthes tuberosa  - tuberose
Poliomintha longiflora  - rosemary mint
Poliothyrsis sinensis  - Chinese pearlbloom
Pollia japonica  - pollia
Polygala × dalmaisiana  - sweet pea shrub
Polygonatum biflorum  - Solomon's seal
Polygonatum biflorum var. commutatum  - giant Solomon's seal
Polygonatum filipes  - slender stalk Solomon's seal
Polygonatum humile  - dwarf Solomon's seal
Polygonatum odoratum  - Solomon's seal
Polygonatum 'Prince Charming'  - Solomon's seal
Polymnia canadensis  - small-flowered leaf cup
Polypodium polypodioides  - Resurrection fern
Polypodium virginianum  - rock polypody
Polyscias filicifolia  - fern-leaf aralia
Polyscias fruticosa  - Ming aralia
Polystichum acrostichoides  - Christmas fern   ( POM )
Polystichum braunii  - Braun's holly fern
Polystichum luctuosum  - dwarf holly fern
Polystichum polyblepharum  - tassel fern
Polystichum setiferum  - soft shield fern
Poncirus trifoliata  - hardy orange
Pontederia cordata  - pickerel weed
Populus alba  - white poplar
Populus deltoides  - eastern cottonwood
Populus nigra  - black poplar
Populus nigra 'Italica'  - black poplar
Populus tremula  - aspen
Populus tremuloides  - American aspen
Porteranthus trifoliatus  - Indian physic
Portulaca grandiflora  - rose moss
Portulaca oleracea  - little hogweed
Portulaca oleracea RIO SERIES  - purslane   ( POM )
Potentilla alba  - cinquefoil
Potentilla anserina  - silkweed
Potentilla argentea  - silvery cinquefoil
Potentilla atrosanguinea  - cinquefoil
Potentilla erecta  - erect cinquefoil
Potentilla 'Flamenco'  - cinquefoil
Potentilla fruticosa  - shrubby cinquefoil
Potentilla fruticosa 'Abbotswood'  - shrubby cinquefoil
Potentilla fruticosa 'Hallman Dwarf'  - shrubby cinquefoil
Potentilla gracilis  - cinquefoil
Potentilla neumanniana  - cinquefoil
Potentilla recta  - sulphur cinquefoil
Potentilla recta 'Warrenii'  - sulphur cinquefoil
Potentilla rupestris  - rock cinquefoil
Pratia angulata  - pratia
Premna microphylla  - musk maple
Primula 'Alejandra'  - primrose
Primula 'Juanita'  - primula
Primula kisoana  - hardy primrose
Primula × pubescens  - primrose
Primula veris  - cowslip
Primula vulgaris  - primrose
Primula 'Wanda'  - pruhonicensis hybrid primula
Primula 'Wanda Kay'  - primula
Pritchardia pacifica  - Fiji palm
Prostanthera cuneata 'Badja Peak'  - badja peak mint bush
Protea cynaroides  - king protea
Prunella grandiflora  - self heal
Prunus americana  - wild plum
Prunus angustifolia  - chickasaw plum
Prunus avium  - bird cherry
Prunus avium 'Stella'  - bird cherry
Prunus caroliniana  - cherry laurel
Prunus cerasifera  - cherry plum
Prunus × cistena  - purple-leaf sand cherry
Prunus davidiana  - David's peach
Prunus dulcis  - almond
Prunus glandulosa  - Chinese plum
Prunus glandulosa 'Sinensis'  - dwarf flowering almond
Prunus 'Kanzan'  - Japanese flowering cherry
Prunus laurocerasus  - cherry laurel
Prunus maackii  - Manchurian cherry
Prunus mandshurica  - Manchurian apricot
Prunus mexicana  - Mexican plum
Prunus mume  - Japanese apricot
Prunus mume 'Fenghou'  - Japanese apricot
Prunus mume 'Peggy Clarke'  - Japanese apricot
Prunus 'North Star'  - sour cherry
Prunus 'Okame'  - Taiwan cherry
Prunus padus  - bird cherry
Prunus padus 'Albertii'  - bird cherry
Prunus padus 'Berg'  - bird cherry
Prunus padus 'Colorata'  - bird cherry
Prunus pendula 'Pendula Rosea'  - weeping higan cherry
Prunus persica 'Bonfire'  - ornamental peach
Prunus 'Redheart'  - dwarf plum
Prunus sargentii  - Sargent cherry
Prunus sargentii 'Columnaris'  - Sargent cherry
Prunus serotina  - black cherry
Prunus serrula  - ornamental cherry
Prunus serrulata  - Japanese flowering cherry
Prunus 'Shirotae'  - Mount Fuji cherry
Prunus 'Snofozam' SNOW FOUNTAINS  - weeping higan cherry
Prunus STARK GOLDEN SWEET  - semi-dwarf cherry
Prunus subhirtella  - higan cherry
Prunus tomentosa  - downy cherry
Prunus triloba  - flowering almond
Prunus triloba 'Multiplex'  - flowering almond
Prunus virginiana  - chokecherry
Prunus × yedoensis  - yoshino cherry
Psephellus pulcherrimus  - psephellus
Pseudocydonia sinensis  - Chinese-quince
Pseudogynoxys chenopodioides  - Mexican flame vine
Pseudolarix amabilis  - golden larch
Pseudomuscari azureum  - grape hyacinth
Pseudosasa japonica  - arrow bamboo
Pseudotsuga menziesii  - Douglas fir
Psidium littorale  - yellow strawberry guava
Ptelea trifoliata  - hop tree
Pteridium aquilinum  - bracken
Pteris cretica  - cretan brake
Pterocarya fraxinifolia  - Caucasian wingnut
Pterocarya stenoptera  - Chinese wingnut
Pterostyrax hispida  - fragrant epaulette tree
Pulmonaria longifolia  - lungwort
Pulmonaria 'Majesté'  - lungwort
Pulmonaria officinalis  - common lungwort
Pulmonaria rubra  - pulmonaria
Pulmonaria saccharata  - Bethlehem sage
Pulmonaria 'Spilled Milk'  - Bethlehem sage
Pulsatilla halleri  - Haller's pasque flower
Pulsatilla patens  - eastern pasqueflower
Pulsatilla vulgaris  - pasque flower
Pulsatilla vulgaris 'Alba'  - pasque flower
Punica granatum  - pomegranate
Punica granatum var. nana  - dwarf pomegranate
Puschkinia scilloides  - striped squill
Pycnanthemum incanum  - mountain mint
Pycnanthemum muticum  - blunt mountainmint   ( POM )
Pycnanthemum pilosum  - American mountain mint
Pycnanthemum setosum  - mountain mint
Pycnanthemum tenuifolium  - slender mountain mint
Pycnanthemum tenuifolium 'Cat Springs'  - slender mountain mint
Pycnanthemum virginianum  - American mountain mint
Pyracantha coccinea  - scarlet firethorn
Pyracantha coccinea 'Rutgers'  - scarlet firethorn
Pyrus calleryana 'Bradford'  - callery pear
Pyrus calleryana 'Capital'  - callery pear
Pyrus communis  - wild pear
Pyrus salicifolia  - willowleaf pear
Pyrus salicifolia 'Pendula'  - willowleaf pear
Pyrus salicifolia 'Silver Frost'  - willowleaf pear