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Last updated October 1, 2009

Name Family Nativity
Pacherocactus orcuttii Cactaceae Mexico
Pachycereus fulviceps Cactaceae Mexico
Pachycereus fulviceps hybrid Cactaceae  
Pachycereus gatesii Cactaceae Mexico
Pachycereus gaumeri Cactaceae SW U.S. to Guatemala
Pachycereus grandis Cactaceae Mexico
Pachycereus marginatus Cactaceae Mexico
Pachycereus montanus Cactaceae  
Pachycereus pecten-aboriginum Cactaceae Mexico
Pachycereus pringlei Cactaceae Mexico
Pachycereus schottii Cactaceae SW Arizona to NW Mexico
Pachycereus schottii f. monstrose Cactaceae SW Arizona to NW Mexico
Pachycereus sp. Cactaceae  
Pachycereus weberi Cactaceae Mexico
Pachycormus discolor Anacardiaceae Baja California
Pachyphytum aff. sp. Crassulaceae  
Pachyphytum hookeri Crassulaceae Mexico
Pachyphytum sp. Crassulaceae  
Pachypodium bispinosum Apocynaceae South Africa
Pachypodium cf. lamerei Apocynaceae Madagascar
Pachypodium geayi Apocynaceae SW Madagascar
Pachypodium lamerei Apocynaceae Madagascar
Pachypodium lamerei v. ramosum Apocynaceae Madagascar
Pachypodium mikea Apocynaceae Madagascar
Pachypodium rosulatum Apocynaceae Madagascar
Pachypodium succulentum Apocynaceae South Africa
Paeonia suffruticosa Paeoniaceae  
Pancratium maritimum Amaryllidaceae Mediterranean, SW Europe
Pandanus tectorius Pandanaceae Tahiti
Pandorea jasminoides cv. Alba Bignoniaceae Australia
Parajubaea cocoides Arecaceae Ecuador
Parajubaea torallyi Arecaceae Bolivia
Parajubaea torallyi v. torallyi Arecaceae Bolivia
Parodia ocampoi Cactaceae Bolivia(Cochabamba)
Paspalum quadrifolia Poaceae New World Tropics
Passiflora citrina Passifloraceae Honduras
Passiflora cv. Coral Sea Passifloraceae  
Passiflora cv. Lavender Lady Passifloraceae  
Passiflora membranacea Passifloraceae Mexico to Panama
Passiflora sanguinolenta Passifloraceae Ecuador
Passiflora vitifolia Passifloraceae Cen to South America
Passiflora x alatocaerulea Passifloraceae  
Paulownia tomentosa Scrophulariaceae C & W China
Pelargonium carnosum Geraniaceae South Africa
Pelargonium citronellum cv. Mabel Gray Geraniaceae  
Pelargonium cotyledonis Geraniaceae St. Helena
Pelargonium crassipes Geraniaceae South Africa
Pelargonium crispum cv. French Lace Geraniaceae  
Pelargonium crispum cv. Minor Geraniaceae  
Pelargonium cv. Clorinda Geraniaceae  
Pelargonium cv. Elegance Burgundy Geraniaceae  
Pelargonium cv. Maiden Iced Wine Geraniaceae  
Pelargonium cv. Maiden Red Geraniaceae  
Pelargonium cv. Maiden Rose Pink Geraniaceae  
Pelargonium cv. Royalty White Geraniaceae  
Pelargonium densiflorum cv. Filicifolium Geraniaceae  
Pelargonium fruticosum Geraniaceae South Africa
Pelargonium graveolens Geraniaceae  
Pelargonium graveolens cv. Mint-Scented Rose Geraniaceae  
Pelargonium graveolens cv. Snowflake Geraniaceae  
Pelargonium ionidiflorum Geraniaceae South Africa
Pelargonium peltatum cv. L'elegante Geraniaceae  
Pelargonium peltatum x hortorum cv. Alpenglow Geraniaceae  
Pelargonium quercifolium cv. Endsleigh Geraniaceae  
Pelargonium sidoides Geraniaceae South Africa
Pelargonium sp. Geraniaceae  
Pelargonium tomentosum Geraniaceae South Africa
Pelargonium x blandfordianum roseum Geraniaceae  
Pelargonium x domesticum cv. Dubonnet Geraniaceae  
Pelargonium x domesticum cv. Excalibur Geraniaceae  
Pelargonium x domesticum cv. Swedish Beauty Geraniaceae  
Pelargonium x domesticum cv. Voodoo Geraniaceae  
Pelargonium x fragrans cv. Nutmeg Geraniaceae  
Pelargonium x fragrans v. variegatum Geraniaceae  
Pelargonium x hortorum cv. Happy Thoughts Geraniaceae  
Pelargonium x hortorum cv. Occold Shield Geraniaceae  
Pelargonium x rutaceum Geraniaceae  
Pelargonium xerophyton Geraniaceae Namibia
Pellaea falcata Polypodiaceae India to Australasia
Pellaea viridis Pteridaceae Africa to India
Peniocereus johnstonii Cactaceae NE Mexico
Peniocereus serpentinus Cactaceae Mexico
Peniocereus sp. Cactaceae  
Pennisetum orientale Poaceae Central & SW Asia
Pennisetum setaceum cv. Rubrum Poaceae  
Penstemon cv. Firebird Scrophulariaceae  
Penstemon cv. Garnet Scrophulariaceae  
Penstemon hybrids Scrophulariaceae  
Peperomia kimnachii Piperaceae Bolivia
Peperomia sp. Piperaceae Ecuador
Pereskia grandifolia Cactaceae Brazil
Pereskia sacharosa Cactaceae South America
Pereskia sp. Cactaceae  
Pereskia x bleo Cactaceae  
Pereskia zinniiflora Cactaceae Cuba
Perovskia cv. Blue Spire Lamiaceae Pakistan
Persea americana cv. Haas Lauraceae  
Persea americana cv. Pinkerton Lauraceae  
Phaius tankervilliae Orchidaceae Himalaya to Australia
Phalaris arundinacea cv. Picta Poaceae  
Phegopteris decursive-pinnata Thelypteridaceae E. Asia
Philodendron bipinnatifidum Araceae Paraguay, S. Brazil
Philodendron sp. Araceae  
Phlebodium pseudoaureum cv. Polypodiaceae  
Phlebodium pseudoaureum cv. Glaucum Polypodiaceae  
Phlomis cashmeriana Lamiaceae Afganistan
Phlomis lanata Lamiaceae Greece
Phlomis purpurea Lamiaceae Spain
Phoenix canariensis Arecaceae Spain(Canary Islands)
Phoenix canariensis hybrid Arecaceae Spain(Canary Islands)
Phoenix dactylifera Arecaceae African Tropics
Phoenix reclinata Arecaceae African Tropics
Phoenix roebelenii Arecaceae Laos
Phoenix sylvestris Arecaceae India
Phoenix theophrastii Arecaceae Greece(Crete), Turkey
Phormium cv. Duet Phormiaceae  
Phormium cv. Dusky Chief Phormiaceae New Zealand
Phormium cv. Sundowner Phormiaceae  
Photinia x fraseri Rosaceae S & E Asia
Phygelius x rectus cv. Moonraker Scrophulariaceae  
Phylica buxifolia Rhamnaceae South Africa
Phyllanthus reticulatus Euphorbiaceae Old World Tropics
Phyllitis scolopendrium Polypodiaceae Worldwide
Phyllostachys bambusoides Poaceae China, Japan
Phyllostachys nigra Poaceae China, Japan
Phyllostachys nigra cv. Henon Poaceae  
Phyllostachys viridis cv. Robert Young Poaceae  
Phytolacca dioica Phytolaccaceae South America
Phytolacca dioica x weberbaueri Phytolaccaceae  
Picea pungens cv. Glauca Pinaceae  
Picea sp. Pinaceae  
Pilosocereus aff. sp. Cactaceae  
Pilosocereus aurisetus Cactaceae Brazil
Pilosocereus chrysacanthus Cactaceae Mexico
Pilosocereus chrysostele Cactaceae Brazil
Pilosocereus diersianus Cactaceae Brazil(Goias)
Pilosocereus flavipulvinatus Cactaceae Brazil
Pilosocereus gounellei ssp. zehntneri Cactaceae Brazil
Pilosocereus lanuginosus Cactaceae N South America
Pilosocereus leucocephalus Cactaceae Mexico to Guatemala & Honduras
Pilosocereus pachycladus Cactaceae Brazil
Pilosocereus purpusii Cactaceae Mexico
Pilosocereus royenii Cactaceae Mexico, Carribean
Pilosocereus sp. Cactaceae  
Pilosocereus ulei Cactaceae Brazil
Pinus brutia ssp. eldarica Pinaceae Afghanistan, Turkey
Pinus canariensis Pinaceae Spain(Canary Islands)
Pinus densiflora Pinaceae Japan
Pinus elliottii Pinaceae SE United States
Pinus glabra Pinaceae SE United States
Pinus greggii Pinaceae NE Mexico
Pinus halepensis Pinaceae Mediterranean
Pinus martinezii Pinaceae Mexico(Michoacan)
Pinus monophylla Pinaceae California to Baja California
Pinus mugo v. mugo Pinaceae Central Europe
Pinus muricata Pinaceae California
Pinus oocarpa Pinaceae NW Mexico to Nicaragua
Pinus pinea Pinaceae Mediterranean
Pinus radiata Pinaceae California to Baja California
Pinus strobus Pinaceae E North America
Pinus taeda Pinaceae New Jersey to Texas
Pinus thunbergiana Pinaceae Japan
Pinus thunbergiana cv. Monina Pinaceae  
Pinus torreyana Pinaceae San Diego Co, Santa Rosa Is,Ca
Pinus x attenuradiata Pinaceae  
Piper aduncum Piperaceae N S. America
Pisonia umbellifera cv. Variegata Nyctaginaceae  
Pistia stratiotes Araceae Pantropical
Pitcairnia sp. Bromeliaceae  
Pittosporum crassifolium Pittosporaceae New Zealand
Pittosporum phillyreoides Pittosporaceae Australia
Pittosporum tobira Pittosporaceae China, Japan
Pittosporum tobira cv. Variegata Pittosporaceae  
Pittosporum undulatum Pittosporaceae Australia
Pittosporum viridiflorum Pittosporaceae South Africa
Pityrogramma austroamericana Hemionitidaceae South America
Plagianthus regius Malvaceae Australia
Plantago sp. Plantaginaceae  
Platanus racemosa Platanaceae S California to Baja CA
Platycerium andinum Polypodiaceae Peru, Bolivia
Platycerium bifurcatum Polypodiaceae Australia
Platycerium bifurcatum Polypodiaceae E. Australia
Platycerium bifurcatum cv. Netherlands Polypodiaceae  
Platycerium bifurcatum cv. Roberts Polypodiaceae  
Platycerium bifurcatum cv. Ziesenhenne Polypodiaceae  
Platycerium bifurcatum v. venosum Polypodiaceae NE Australia
Platycerium cv. Jimmy Polypodiaceae  
Platycerium cv. Pumila Polypodiaceae  
Platycerium hillii Polypodiaceae Australia
Platycerium sp. Polypodiaceae  
Platycerium superbum Polypodiaceae  
Platycerium superbum Polypodiaceae Australia
Platycerium willinckii Polypodiaceae Indonesia
Platycerium willinckii Polypodiaceae Indonesia(Java)
Platycerium willinckii cv. Lemoinei Polypodiaceae  
Platycerium willinckii cv. Scofield Polypodiaceae  
Plectocomia elongata Arecaceae Indonesia
Plectranthus argentatus Lamiaceae Australia(Queensland)
Plectranthus ciliatus cv. Drege Lamiaceae  
Plectranthus fruticosus Lamiaceae South Africa
Plectranthus socotranus Lamiaceae Yemen
Plectranthus sp. Lamiaceae  
Pleioblastus pygmaeus Poaceae Japan
Pleioblastus viridi-striatus Poaceae Japan
Pleomele hawaiiensis Agavaceae Hawaii
Plumbago auriculata cv. Imperial Blue Plumbaginaceae  
Plumeria rubra cv. Guillot's Sunset Apocynaceae  
Plumeria rubra cv. Hawaiian Yellow Apocynaceae  
Plumeria rubra cv. Nelly's White Apocynaceae  
Plumeria sp. Apocynaceae  
Poa costiniana Poaceae Australia
Podocarpus alpinus Podocarpaceae SE Australia
Podocarpus elatus Podocarpaceae Australia
Podocarpus macrophylla Podocarpaceae Japan
Podocarpus totara Podocarpaceae New Zealand
Polaskia chende Cactaceae S Mexico(Puebla, Oaxaca)
Polaskia chichipe Cactaceae Mexico
Polygala x dalmaisiana Polygalaceae  
Polypodium formosanum cv. Cristatum Polypodiaceae  
Polypodium guttatum Polypodiaceae Mexico
Polypodium scouleri Polypodiaceae Canada(Br. Columbia) to Cal.
Polypodium sp. Polypodiaceae  
Polyscias sambucifolia Araliaceae Australia
Polystichum acrostichoides Polypodiaceae E North America
Polystichum munitum Polypodiaceae Alaska to Monterey, California
Polystichum polyblepharum Polypodiaceae Asia
Polystichum setiferum Polypodiaceae Europe
Polystichum tsus-simense Polypodiaceae China, Japan, Korea
Polystichum x dycei Dryopteridaceae  
Pomaderris pilifera Rhamnaceae Australia
Portea grandibracteata Bromeliaceae Brazil
Portea petropolitana v. extensa Bromeliaceae Brazil
Portea silveirae Bromeliaceae Brazil
Portulacaria afra Portulacaceae South Africa
Praecereus cavendishii Cactaceae S Brazil, Argentina, Paraguay
Praecereus euchlorus ssp. diffusa Cactaceae S Ecuador, N Peru
Praecereus sp. Cactaceae  
Pratia pedunculata Campanulaceae  
Pritchardia beccariana Arecaceae Hawaii
Pritchardia hillebrandii Arecaceae Hawaii
Protasparagus africanus Asparagaceae S & SW Africa
Protasparagus densiflorus cv. Cwebe Asparagaceae  
Protasparagus densiflorus cv. Flagstaff Asparagaceae  
Protasparagus densiflorus cv. Mazeppa Asparagaceae  
Protasparagus densiflorus cv. Meyers Asparagaceae  
Protasparagus densiflorus cv. Sprengeri Asparagaceae  
Protasparagus macowanii Asparagaceae South Africa
Protasparagus retrofractus Asparagaceae South Africa
Protasparagus virgatus Asparagaceae South Africa
Prunus armeniaca cv. Gold Kist Rosaceae  
Prunus armeniaca cv. Katy Rosaceae  
Prunus armeniaca cv. Lorna Rosaceae  
Prunus armeniaca cv. Newcastle Rosaceae  
Prunus armeniaca cv. Royal Rosaceae  
Prunus armeniaca x domestica Rosaceae  
Prunus armeniaca x domestica cv. Dapple Dandy Rosaceae  
Prunus armeniaca x domestica cv. Flavor Delight Rosaceae  
Prunus armeniaca x domestica cv. Flavor Queen Rosaceae  
Prunus avium cv. Craig's Crimson Rosaceae  
Prunus avium cv. Stella Rosaceae  
Prunus avium x domestica cv. Delight Rosaceae  
Prunus avium x domestica cv. Sprite Rosaceae  
Prunus campanulata Rosaceae Taiwan, Japan(Ryukyu Is.)
Prunus domestica Rosaceae  
Prunus domestica cv. Rosaceae  
Prunus domestica cv. Burgundy Rosaceae  
Prunus domestica cv. Howard Miracle Rosaceae  
Prunus domestica cv. Laroda Rosaceae  
Prunus domestica ssp. italica cv. Green Gage Rosaceae  
Prunus domestica v. italica cv. Green Gage Rosaceae  
Prunus dulcis cv. All-in-One Rosaceae  
Prunus dulcis cv. Garden Prince Rosaceae  
Prunus dulcis cv. Nonpareil Rosaceae  
Prunus dulcis cv. Price Rosaceae  
Prunus ilicifolia Rosaceae California and Baja, Ca
Prunus ilicifolia ssp. lyonii Rosaceae California
Prunus ilicifolia ssp. lyonii Rosaceae USA
Prunus laurocerasus Rosaceae SE Europe to SW Asia
Prunus persica cv. August Pride Rosaceae  
Prunus persica cv. Australian Saucer Rosaceae  
Prunus persica cv. Babcock Rosaceae  
Prunus persica cv. Earlitreat Rosaceae  
Prunus persica cv. Edwards Ambrosia Rosaceae  
Prunus persica cv. Midpride Rosaceae  
Prunus persica cv. Ventura Rosaceae  
Prunus persica v. nucipersica cv. Arctic Glo Rosaceae  
Prunus persica v. nucipersica cv. Arctic Star Rosaceae  
Prunus persica v. nucipersica cv. Desert Dawn Rosaceae  
Prunus persica v. nucipersica cv. Double Delight Rosaceae  
Prunus persica v. nucipersica cv. Edwards Divinity Rosaceae  
Prunus persica v. nucipersica cv. Fantasia Rosaceae  
Prunus persica v. nucipersica cv. Panamint Rosaceae  
Prunus salicina cv. Beauty Rosaceae  
Prunus salicina cv. Friar Rosaceae  
Prunus salicina cv. Santa Rosa Rosaceae  
Prunus salicina cv. Satsuma Rosaceae  
Prunus sp. Rosaceae  
Pseudananas sagenarius Bromeliaceae Brazil, Paraguay
Pseudobombax elipticum Bombacaceae Mexico
Pseudobombax ellipticum Bombacaceae Mexico
Pseudorhipsalis ramulosa Cactaceae Mexico to Bolivia
Psidium littorale v. longipes Myrtaceae Brazil
Psilotum nudum Psilotaceae  
Psoralea pinnata Fabaceae South Africa(E. Cape Province)
Pteris calderi Pteridaceae  
Pteris cretica Polypodiaceae  
Pteris cretica cv. Rivertoniana Pteridaceae  
Pteris cretica cv. Wimsettii Polypodiaceae  
Pteris cretica v. nervosa Pteridaceae  
Pteris quadriaurita v. argyraea Polypodiaceae India
Pteris tremula Polypodiaceae Australia, New Zealand
Pteris vittata Polypodiaceae Worldwide
Pteris wallichiana Pteridaceae  
Pterocactus aff. fischeri Cactaceae Argentina
Pterocactus fischeri Cactaceae Argentina
Pterocactus sp. Cactaceae Argentina
Punica granatum cv. Wonderful Punicaceae  
Puya alpestris Bromeliaceae Chile
Puya coerulea Bromeliaceae Chile
Puya colima x humilis Bromeliaceae  
Puya dyckioides Bromeliaceae Argentina
Puya humilis Bromeliaceae Bolivia
Puya laxa Bromeliaceae Chile
Puya mirabilis Bromeliaceae Argentina, Bolivia
Puya sp. Bromeliaceae  
Puya venusta Bromeliaceae Chile
Pyrrosia hastata Polypodiaceae  
Pyrrosia lingua Polypodiaceae Asia
Pyrrosia lingua cv. Variegata Polypodiaceae  
Pyrrosia shearei Polypodiaceae S.E. Asia
Pyrrosia sp. Polypodiaceae  
Pyrus communis cv. Rosaceae  
Pyrus communis cv. Flordahome Rosaceae  
Pyrus communis cv. Hood Rosaceae  
Pyrus communis cv. Kieffer Rosaceae  
Pyrus communis cv. Monterrey Rosaceae  
Pyrus cv. 20th Century Rosaceae  
Pyrus cv. Kieffer Rosaceae  
Pyrus cv. Shinko Rosaceae  
Pyrus cv. Shinseiki Rosaceae  
Pyrus cv. Tsu Li Rosaceae  
Pyrus cv. Ya Li Rosaceae