P

Genus/species/cultivar
Paeonia ‘Garden Treasure’
Paeonia delavayi var. angustiloba f. angustiloba
Paeonia emodi
Paeonia lactiflora ‘Do Tell’
Paeonia lactiflora ‘Félix Crousse’
paeonia lactiflora ‘Honey Gold’
Paeonia lactiflora ‘Kansas’
Paeonia lactiflora ‘Laura Dessert’
Paeonia lactiflora ‘Marie Lemoine’
Paeonia lactiflora ‘Sarah Bernhardt’
Paeonia lactiflora ‘Shirley Temple’
Paeonia ludlowii
Paeonia mascula
Paeonia mlokosewitschii
Paeonia peregrina ‘Otto Froebel’
Paeonia x festiva ‘Rubra Plena’
Paliurus spina-christi
Parrotia persica
Parrotia persica ‘Bella’
Parrotia persica ‘Burgundy’
Parrotia persica ‘Vanessa’
Parrotiopsis jacquemontiana
Parthenocissus henryana
Paulownia tomentosa
Paulownia tomentosa ‘Coreana’
Paulownia tomentosa ‘Lilacina’
Penstemon davidsonii
Phellodendron amurense
Phellodendron chinense
Phellodendron japonicum
Phellodendron molle
Phellodendron sachalinense
Philadelhpus ‘Avalanche’
Philadelphus ‘Atlas’
Philadelphus ‘Audrey’
Philadelphus ‘Avalanche’
Philadelphus ‘Belle étoile’
Philadelphus ‘Bialy Karzel’
Philadelphus ‘Boule d’Argent’
Philadelphus ‘Bouquet Blanc’
Philadelphus ‘Buckley’s Quill’
Philadelphus ‘Burfordensis’
Philadelphus ‘Coupe d’Argent’
Philadelphus ‘Dame Blanche’
Philadelphus ‘Enchantment’
Philadelphus ‘Erectus’
Philadelphus ‘Falconeri’
Philadelphus ‘Frosty Morn’
Philadelphus ‘Gerbe de Neiges’
Philadelphus ‘Glacier’
Philadelphus ‘Innocence’
Philadelphus ‘Kasia’
Philadelphus ‘Lemoinei’
Philadelphus ‘Lemon Hill’
Philadelphus ‘Limestone’
Philadelphus ‘Manteau d’Hermine’
Philadelphus ‘Marjorie’
Philadelphus ‘Minnesota Snowflake’
Philadelphus ‘Monster’
Philadelphus ‘Mont Blanc’
Philadelphus ‘Mrs E.l. Robinson’
Philadelphus ‘Natchez’
Philadelphus ‘oeil de Pourpre’
Philadelphus ‘Rusalka’
Philadelphus ‘Silberregen’
Philadelphus ‘Starbright’
Philadelphus ‘Sybille’
Philadelphus ‘Velléda’
Philadelphus ‘Virginal’
Philadelphus ‘White Rock’
Philadelphus aff. ‘Virginal’
Philadelphus aff. floribundus
Philadelphus affinis
Philadelphus argyrocalyx
Philadelphus brachybotrys
Philadelphus calcicola
Philadelphus californicus
Philadelphus caucasicus
Philadelphus coronarius ‘Aureus’
Philadelphus coronarius ‘Variegatus’
Philadelphus delavayi
Philadelphus delavayi aff. var. calvescens
Philadelphus floridus
Philadelphus grandiflorus
Philadelphus henryi
Philadelphus incanus
Philadelphus inodorus var. laxus
Philadelphus insignis
Philadelphus karwinskianus
Philadelphus laxus var. strigosus
Philadelphus lewisii
Philadelphus lewisii ‘Snow Velvet’
Philadelphus lewisii ‘Waterton’
Philadelphus maculatus ‘Mexican Jewel’
Philadelphus madrensis
Philadelphus microphyllus
Philadelphus microphyllus var. occidentalis
Philadelphus myrtoides
Philadelphus nepalensis
Philadelphus pekinensis
Philadelphus purpurascens
Philadelphus sargentianus
Philadelphus satsumanus
Philadelphus satsumi
Philadelphus schrenkii
Philadelphus schrenkii var. mandschuricus
Philadelphus sericanthus
Philadelphus sericanthus var. kulingensis
Philadelphus sp.
Philadelphus subcanus
Philadelphus subcanus var. magdalenae
Philadelphus subcanus var. wilsonii
Philadelphus tomentosus
Philadelphus tomentosus f. nepalensis
Philadelphus triflorus
Philadelphus x virginalis
Philadelphus zeyheri
Philadelphus zhejiangensis
Philadelpus ‘Monster’
Phillyrea angustifolia
Phillyrea angustifolia f. rosmarinifolia
Phillyrea latifolia
Phlox paniculata ‘David’
Phlox paniculata ‘Mount Fuji’
Photinia beauverdiana
Photinia beauverdiana var. notabilis
Photinia davidiana
Photinia davidiana ‘Palette’
Photinia davidiana var. undulata ‘Prostrata’
Photinia schneideriana
Photinia serratifolia
Photinia villosa
Photinia x fraseri ‘Pink Marble’
Photinia x fraseri ‘Robusta’
Phyllostachys nigra
Phyllostachys nigra ‘Boryana’
Phyllostachys violascens
Physcocarpus bracteatus
Physocarpus amurensis
Physocarpus opulifolius ‘Dart’s Gold’
Physocarpus opulifolius ‘Diabolo’
Picea abies
Picea abies ‘Argenteospica’
Picea abies ‘Aurea’
Picea abies ‘Finedonensis’
Picea abies ‘Inversa’
Picea abies ‘Pumila Nigra’
Picea abies ‘Reflexa’
Picea alcoquiana
Picea asperata
Picea brachytyla
Picea breweriana
Picea chihuahuana
Picea engelmannii
Picea engelmannii (Glauca Group)
Picea engelmannii subsp. mexicana
Picea farreri
Picea glauca
Picea glauca var. albertiana ‘Alberta Blue’
Picea glauca var. albertiana ‘Tiny’
Picea jezoensis subsp. hondoensis
Picea koraiensis
Picea koyamae
Picea koyamae ‘Bedgebury Blue’
Picea likiangensis
Picea likiangensis var. hirtella
Picea likiangensis var. linzhiensis
Picea likiangensis var. montigena
Picea likiangensis var. rubescens
Picea mariana
Picea maximowiczii
Picea meyeri
Picea morrisonicola
Picea obovata ‘Glauca’
Picea obovata var. coerulea
Picea omorika
Picea omorika ‘Pendula’
Picea orientalis
Picea orientalis ‘Gracilis’
Picea orientalis ‘Skylands’
Picea pungens
Picea pungens (Glauca Group)
Picea pungens (Glauca Group) ‘Hoopsii’
Picea pungens (Glauca Group) ‘Koster’
Picea pungens (Glauca Group) ‘Moerheimii’
Picea pungens (Glauca Group) ‘Thomsen’
Picea pungens Glauca Group
Picea purpurea
Picea retroflexa
Picea retroflexa
Picea schrenkiana
Picea smithiana
Picea smithiana ‘Sunray’
Picea sp.
Picea spinulosa
Picea torano
Picea wilsonii
Pieris ‘Forest Flame’
Pieris japonica
Pieris japonica ‘Pygmaea’
Pieris japonica (Taiwanensis Group)
Pieris japonica var. yakushimensis
Pilgerodendron uviferum
Pinus aristata
Pinus arizonica
Pinus armandii
Pinus armandii var. mastersiana
Pinus ayacahuite
Pinus banksiana
Pinus bhutanica
Pinus brutia
Pinus bungeana ‘Diamant’
Pinus bungeana ‘Silver Lace’
Pinus cembra
Pinus cembra (Glauca Group)
Pinus cembroides
Pinus contorta
Pinus contorta var. latifolia
Pinus coulteri
Pinus densata
Pinus densiflora ‘Oculus-draconis’
Pinus densiflora ‘Umbraculifera’
Pinus durangensis
Pinus edulis
Pinus elliottii
Pinus flexilis
Pinus funebris
Pinus gerardiana
Pinus greggii
Pinus hartwegii
Pinus heldreichii
Pinus heldreichii ‘Aureospicata’
Pinus jeffreyi
Pinus koraiensis
Pinus montezumae
Pinus monticola
Pinus monticola ‘Strobicola’
Pinus mugo
Pinus mugo ‘Tuffet’
Pinus muricata
Pinus nigra
Pinus nigra ‘Green Tower’
Pinus nigra subsp. laricio
Pinus parviflora ‘Blue Giant’
Pinus parviflora ‘Tempelhof’
Pinus parviflora (Glauca Group) ‘Glauca’
Pinus peuce
Pinus pinaster
Pinus pinea
Pinus ponderosa
Pinus ponderosa var. scopulorum
Pinus radiata
Pinus sp.
Pinus strobus
Pinus sylvestris
Pinus sylvestris (Aurea Group) ‘Aurea’
Pinus sylvestris var. mongolica
Pinus tabuliformis
Pinus tabuliformis var.  mukdensis
Pinus taeda
Pinus taiwanensis
Pinus thunbergii
Pinus x densithunbergii
Pinus x holfordiana
Pinus x schwerinii
Planera aquatica
Platanus orientalis
Platanus orientalis f. digitata
Platanus x hispanica
Platycarya strobilacea
Pleioblastus viridistriatus
Podocarpus lawrencei
Podocarpus nivalis
Polemonium ‘Northern Lights
Poliothyrsis sinensis
Polyspora sp.
Populus alba ‘Raket’
Populus alba ‘Richardii’
Populus balsamifera
Populus maximowiczii
Populus szechuanica var. tibetica
Populus x canadensis
Populus x canadensis ‘Aurea’
Populus x canadensis ‘Marilandica’
Populus yunnanensis
Potentilla
fruticosa
‘McKay’s White’
Potentilla ‘Gibson’s Scarlet’
Potentilla ‘Jack Elliot’
Potentilla fruticosa ‘Abbotswood’
Potentilla fruticosa ‘Daydawn’
Potentilla fruticosa ‘Glenroy Pinkie’
Potentilla fruticosa ‘Grace Darling’
Potentilla fruticosa ‘Grandiflora’
Potentilla fruticosa ‘Hopleys Pink’
Potentilla fruticosa ‘Jackman’s Variety’
Potentilla fruticosa ‘Katherine Dykes’
Potentilla fruticosa ‘Manchu’
Potentilla fruticosa ‘Marian Red Robin’
Potentilla fruticosa ‘McKay’s White’
Potentilla fruticosa ‘McKays White’
Potentilla fruticosa ‘Mount Everest’
Potentilla fruticosa ‘Pink Queen’
Potentilla fruticosa ‘Pretty Polly’
Potentilla fruticosa ‘Snowbird’
Potentilla fruticosa ‘Snowflake’
Potentilla fruticosa ‘Tangerine’
Potentilla fruticosa ‘Tilford Cream’
Potentilla fruticosa ‘White Rain’
Potentilla fruticosa Marian Red Robin
Primula denticulata
Prinsepia sinensis
Prinsepia uniflora
Prinsepia utilis
Prostanthera cuneata
Pruinopitys taxifolia
Prumnopitys andina
Prunus ‘Accolade’
Prunus ‘Amanogawa’
Prunus ‘Aratama’
Prunus ‘Asano’
Prunus ‘Beni-tamanishiki’
Prunus ‘Beni-yutaka’
Prunus ‘Botan-zakura’
Prunus ‘Daikoku’
Prunus ‘Hally Jolivette’
Prunus ‘Hanagasa’
Prunus ‘Horinji’
Prunus ‘Ichiyo’
Prunus ‘Imose’
Prunus ‘Jacqueline’
Prunus ‘Jo-nioi’
Prunus ‘Kanzan’
Prunus ‘Kouka’
Prunus ‘Kursar’
Prunus ‘Matsumae-aizen’
Prunus ‘Matsumae-akatsu-kinokane’
Prunus ‘Matsumae-asami’
Prunus ‘Matsumae-beni-murasaki’
Prunus ‘Matsumae-beni-somei-goromo’
Prunus ‘Matsumae-beni-somei’
Prunus ‘Matsumae-benigasa’
Prunus ‘Matsumae-benitame’
Prunus ‘Matsumae-fuki’
Prunus ‘Matsumae-ha-kuho’
Prunus ‘Matsumae-hana-guruma’
Prunus ‘Matsumae-myojo’
Prunus ‘Matsumae-shirakinu’
Prunus ‘Matsumae-tama-gaki’
Prunus ‘Matsumae-tamagasane’
Prunus ‘Matsumae-wakamushiya-zakura’
Prunus ‘Matsumae-yaekotobuki’
Prunus ‘Matsumae’
Prunus ‘Mikuruma-gaeshi’
Prunus ‘Ojochin’
Prunus ‘Okiku-zakura’
Prunus ‘Pandora’
Prunus ‘Pendula Rubra’
Prunus ‘Pink Perfection’
Prunus ‘Pink Shell’
Prunus ‘Ranran’
Prunus ‘Shirotae’
Prunus ‘Shizuka’
Prunus ‘Shogun’
Prunus ‘Snow Goose’
Prunus ‘Tai-haku’
Prunus ‘Takasago’
Prunus ‘Taki-nioi’
Prunus ‘Ukon’
Prunus ‘Yae-murasaki-zakura’
Prunus avium
Prunus avium ‘Amber Heart’
Prunus avium ‘Plena’
Prunus besseyi
Prunus canescens
Prunus canescens x serrula
Prunus cerasifera ‘Hessei’
Prunus cerasifera ‘Nigra’
Prunus cerasus ‘Morello’
Prunus cerasus ‘Rhexii’
Prunus cornuta
Prunus cyclamina
Prunus domestica ‘Blue Tit’
Prunus domestica ‘Early Rivers’
Prunus domestica ‘Golden Transparent’
Prunus domestica ‘Jefferson’
Prunus domestica ‘Marjorie’s Seedling’
Prunus domestica ‘Victoria’
Prunus dulcis
Prunus grayana
Prunus hirtipes
Prunus incisa ‘Kojo-no-mai’
Prunus incisa ‘Praecox’
Prunus insititia ‘Farleigh Damson’
Prunus laurecerasus ‘Castlewellan’
Prunus laurocerasus
Prunus laurocerasus ‘Castlewellan’
Prunus laurocerasus ‘Latifolia’
Prunus laurocerasus ‘Otto Luyken’
Prunus laurocerasus ‘Schipkaensis Macrophylla’
Prunus laurocerasus ‘Taff’s Golden Gleam’
Prunus litigiosa
Prunus lusitanica
Prunus lusitanica ‘Variegata’
Prunus lustianica
Prunus maackii ‘Amber Beauty’
Prunus Matsumae-hana-guruma
Prunus mume ‘Beni-chidori’
Prunus nipponica var. kurilensis ‘Ruby’
Prunus padus ‘Colorata’
Prunus padus ‘Watereri’
Prunus padus var. commutata
Prunus pensylvanica
Prunus pilosiuscula
Prunus rufa
Prunus sargentii
Prunus serotina
Prunus serrula
Prunus serrulata var. hupehensis
Prunus sogdiana
Prunus spinosa ‘Purpurea’
Prunus ssiori
Prunus tenella ‘Fire Hill’
Prunus tomentosa
Prunus verecunda
Prunus verecunda ‘Autumn Glory’
Prunus x blireana
Prunus x cistena
Prunus x dawyckensis
Prunus x incam ‘Okamé’
Prunus x incam ‘Shosar’
Prunus x subhirtella
Prunus x subhirtella ‘Autumnalis’
Prunus x subhirtella ‘Dahlem’
Prunus x subhirtella ‘Fukubana’
Prunus x subhirtella ‘Pendula rubra’
Prunus x yedoensis
Prunus x yedoensis ‘Shidare-yoshino’
Pseudocydonia sinensis
Pseudolarix amabilis
Pseudotsuga menziesii
Pseudotsuga menziesii ‘Blue Wonder’
Pseudotsuga menziesii ‘Glauca Pendula’
Ptelea trifoliata
Ptelea trifoliata ‘Aurea’
Pterocarya macroptera var. insignis
Pterocarya rhoifolia
Pterocarya stenoptera
Pterocarya x rehderiana
Pterostyrax corymbosa
Pulmonaria ‘Diana Clare’
Pyracantha ‘Knap Hill Lemon’
Pyracantha ‘Orange Glow’
Pyracantha ‘Soleil d’Or’
Pyracantha crenatoserrata
Pyrus ‘Pitmaston Duchess’
Pyrus amygdaliformis
Pyrus amygdaliformis var. cuneifolia
Pyrus calleryana ‘Bradford’
Pyrus calleryana ‘Chanticleer’
Pyrus caucasica
Pyrus communis ‘Beurre Hardy’
Pyrus communis ‘Concorde’
Pyrus communis ‘Conference’
Pyrus communis ‘Doyenné du Comice’
Pyrus communis ‘Durondeau’
Pyrus communis ‘Glou Morceau’
Pyrus communis ‘Onward’
Pyrus communis ‘Packham’s Triumph’
Pyrus communis ‘Winter Nelis’
Pyrus cordata
Pyrus elaeagnifolia var. kotschyana
Pyrus fauriei
Pyrus gharbiana
Pyrus longipes
Pyrus nivalis
Pyrus phaeocarpa
Pyrus pyraster
Pyrus regelii
Pyrus salicifolia ‘Pendula’
Pyrus salicifolia var. orientalis
Pyrus sp.
Pyrus ussuriensis
Pyrus x michauxii