Plants — P
- Pachylobus edulis Dacryodes edulis
- Pachyrhizus erosus Jicama
- Paecilomyces hepiali
- Paederia foetida Chinese fever vine
- Paeonia Paeony
- Paeonia anomala subsp. veitchii Chinese peony
- Paeonia decomposita
- Paeonia lactiflora Chinese Peony
- Paeonia rockii
- Paeonia suffruticosa Tree peony
- Pajanelia
- Palicourea tomentosa Girlfriends Lips
- Panax Ginseng
- Panax ginseng Asian ginseng
- Panax notoginseng
- Panax pseudoginseng Himalayan ginseng
- Panax quinquefolius American ginseng
- Pandanus
- Pandanus tectorius
- Papaver
- Papaver pavoninum
- Papaver rhoeas Common Poppy
- Papaver somniferum
- Parapiptadenia rigida
- Parietaria officinalis eastern pellitory-of-the-wall
- Paris
- Paris polyphylla Love Apple
- Parkia timoriana Legume
- Parmentiera aculeata
- Parnassia palustris Grass-of-Parnassus
- Parthenium hysterophorus
- Parthenocissus heterophylla
- Parthenocissus quinquefolia American Ivy
- Parthenocissus tricuspidata Boston Ivy
- Passiflora Passionflower
- Passiflora alata Wing-stemmed passion flower
- Passiflora edulis Passion Fruit
- Passiflora foetida Fetid passionflower
- Passiflora incarnata Purple Passionflower
- Passiflora jorullensis
- Passiflora laurifolia Bell Apple
- Passiflora ligularis Sweet granadilla
- Pastinaca sativa Parsnip
- Patrinia scabiosifolia Patrinia scabiosaefolia
- Paullinia cupana guarana plant
- Paulownia coreana Korean paulownia
- Pectis angustifolia
- Pectis papposa
- Pedicularis densiflora
- Pediomelum cuspidatum largebract Indian breadroot
- Peganum harmala African Rue
- Pelargonium Geranium
- Pelargonium graveolens Rose-scent Storksbill
- Peliostomum origanoides
- Pellionia repens
- Penicillium Blue Mould Rot
- Peperomia angustata
- Peperomia inaequalifolia
- Peperomia pellucida Clearweed
- Pereskia grandifolia
- Pergularia
- Pergularia daemia Trellis-vine
- Perilla
- Perilla frutescens Beefsteak
- Perilla frutescens var. crispa
- Periploca graeca Grecian Silkvine
- Periploca sepium Chinese silk vine
- Persea americana Aguacate
- Persea borbonia Tamala borbonia
- Persicaria amphibia Amphibious Bistort
- Persicaria chinensis Chinese knotweed
- Persicaria glabra Denseflower Knotweed
- Persicaria hydropiper Marshpepper knotweed
- Persicaria lapathifolia Curlytop Knotweed
- Persicaria minor Small Water-pepper
- Persicaria odorata Vietnamese coriander
- Persicaria orientalis Kiss Me Over The Garden Gate
- Persicaria perfoliata Asian Tearthumb
- Persicaria tinctoria
- Petasites Butterbur
- Petasites hybridus
- Petasites japonicus Butterbur
- Petasites spurius
- Petiveria alliacea Congoroot
- Petroselinum crispum parsley
- Peucedanum oreoselinum mountain-parsley
- Peucedanum ostruthium Masterwort
- Peumus boldus árnica
- Pfaffia paniculata
- Phaseolus ritensis Santa Rita Mountain bean
- Phellodendron Corktree
- Phellodendron amurense Amur Corktree
- Phellodendron chinense Chinese corktree
- Phellodendron sachalinense Sakhalin corktree
- Philodendron
- Phlebodium aureum Gold-foot Fern
- Phleum pratense
- Phlomis pungens
- Phlomis umbrosa Shady jerusalem sage
- Phlomoides rotata Common Lamiophlomis
- Phlomoides tuberosa Candypink Torchwort
- Phoebe tavoyana
- Phoenix dactylifera Date
- Phoradendron quadrangulare Quacimmila De Canario
- Phormium tenax Lowland flax
- Phragmites australis Common Reed
- Phyllanthus acidus Indian-gooseberry
- Phyllanthus amarus Carry me seed
- Phyllanthus emblica Emblic
- Phyllanthus myrtifolius
- Phyllanthus niruri Gale of The Wind
- Phyllanthus pulcher dragon-of-the-world
- Phyllanthus taxodiifolius
- Phyllanthus urinaria Chamber bitter
- Phyllodium elegans
- Phyllolobium chinense Flatstem Milkvetch
- Phyllostachys nigra
- Physalis angulata Angular Winter-cherry
- Physalis minima Pygmy Groundcherry
- Physalis nicandroides
- Physalis peruviana Cape-Goosberry
- Physochlaina
- Physostigma venenosum Calabar bean
- Phytolacca americana American Nightshade
- Picea abies Common Spruce
- Picria fel-terrae
- Picrorhiza kurroa Picrorrhiza
- Pieris japonica
- Pilocarpus
- Pilosella officinarum Mouse-ear Hawkweed
- Pimenta dioica Allspice
- Pimenta pseudocaryophyllus
- Pimpinella Burnet
- Pimpinella anisum
- Pimpinella major Greater Burnet-saxifrage
- Pimpinella saxifraga
- Pinellia ternata
- Pinus Deal
- Pinus lambertiana
- Pinus sylvestris
- Pinus tabuliformis Chinese Red Pine
- Piper betle betel
- Piper cubeba Cubeb
- Piper longum Indian long pepper
- Piper methysticum kava pepper
- Piper nigrum black pepper
- Piper sarmentosum
- Piper sylvaticum
- Piper wallichii
- Piscidia piscipula Fish-fuddle tree
- Pistacia atlantica Atlantic Pistachio
- Pistacia integerrima
- Pistacia lentiscus Chios mastictree
- Pistacia terebinthus Cyprus Turpentine
- Pistia stratiotes Lettuce water
- Pisum sativum Common Pea
- Pithecellobium dulce
- Pittocaulon praecox Broomstick Tree
- Pittosporum illicioides
- Pittosporum tobira
- Plagiorhegma dubium
- Planchonella obovata Black ash
- Plantae leek
- Plantae Cel-Ray
- Plantago Indianwheat
- Plantago asiatica
- Plantago indica sand plantain
- Plantago lanceolata Buckhorn
- Plantago major Broadleaf Plantain
- Plantago major f. yezomaritima Coastal glossy plantain
- Plantago media Hoary Plantain
- Plantago ovata Blond Plantain
- Platostoma palustre Chinese Mesona
- Platycladus orientalis Chinese Thuja
- Platycodon grandiflorus Balloon Flower
- Plectranthus amboinicus Cuban-oregano
- Plectranthus barbatus forskohlii
- Plectranthus hadiensis
- Plectranthus scutellarioides coleus
- Pleiocarpa mutica
- Pleuropterus multiflorus
- Pluchea indica Indian camphorweed
- Pluchea lanceolata
- Pluchea sericea arrow-weed
- Plumbago indica Indian leadwort
- Plumbago zeylanica Blister Bush
- Plumeria Frangipani
- Podophyllum peltatum American Mandrake
- Pogostemon cablin
- Polemonium caeruleum Blue Jacob's Ladder
- Polemonium reptans Creeping Polemonium
- Polygala amarella Dwarf Milkwort
- Polygala japonica Dwarf milkwort
- Polygala senega Seneca Snakeroot
- Polygala sibirica Asian milkwort
- Polygala tenuifolia
- Polygonatum Solomon's Seal
- Polygonatum cyrtonema
- Polygonatum kingianum
- Polygonatum lasianthum Korean solomon’s seal
- Polygonatum odoratum Angular Solomon's-Seal
- Polygonatum sibiricum
- Polygonum aviculare
- Polygonum senticosum
- Polyscias fruticosa Ming Aralia
- Polystichum acrostichoides Christmas Fern
- Pomaria jamesii James' Caesalpinia
- Populus alba Abbey
- Populus davidiana
- Populus fremontii Alamo Cottonwood
- Populus nigra Black Cottonwood
- Populus sect. Populus Aspen, Cottonwood, Poplar
- Populus sect. Tacamahaca
- Populus tremuloides American Aspen
- Populus trichocarpa Balsam Poplar
- Porophyllum punctatum
- Portulaca oleracea Akulikuli-kula
- Potentilla alba
- Potentilla argentea
- Potentilla erecta Erect cinquefoil
- Potentilla reptans Creeping Cinquefoil
- Pouteria caimito Abiu
- Pouteria campechiana Canistel
- Pouzolzia pentandra
- Pouzolzia zeylanica Graceful pouzolzsbush
- Prangos pabularia prangos
- Premna obtusifolia
- Primula
- Primula elatior
- Primula farinosa
- Primula veris
- Prinsepia sinensis Cherry prinsepia
- Procris laevigata
- Prosopis African Mesquites
- Prosopis glandulosa Neltuma glandulosa
- Prunella vulgaris Alpine Self-heal
- Prunus africana African Almond
- Prunus amygdalus Almond
- Prunus armeniaca
- Prunus brahuica
- Prunus debilis
- Prunus dictyoneura
- Prunus fruticosa European Dwarf Cherry
- Prunus maackii Amur cherry
- Prunus padus Bird Cherry
- Prunus persica Peach
- Prunus schlechteri
- Prunus spinosa Blackthorn
- Pseudocarpidium
- Pseudognaphalium obtusifolium Catfoot
- Pseudolarix False Larch
- Pseudolarix amabilis Chinese Golden Larch
- Pseudostellaria heterophylla Heterophylly false-starwort
- Pseudotsuga menziesii British Columbia Fir
- Pseudowintera colorata Mountain Horopito
- Psidium guajava Guava
- Psidium littorale
- Psophocarpus tetragonolobus Four-angled Bean
- Psychotria tenuifolia Wild coffee
- Psychotria viridis
- Psyllium Psyllium seed husks
- Ptelea trifoliata American Hop Tree
- Pterocarpus
- Pterocarpus indicus Amboyna Wood
- Pterocarpus marsupium East Indian kino
- Pterocarpus santalinus Almug
- Pterocaulon sphacelatum Applebush
- Pterocephalus hookeri
- Pterodon emarginatus
- Ptychopetalum
- Pueraria mirifica
- Pueraria montana var. lobata Foot-a-night vine, Japanese arrowroot, Kudzu vine, Vine-that-ate-the-South
- Pueraria tuberosa Indian kudzu
- Pulmonaria Lungwort
- Pulmonaria mollis
- Pulmonaria obscura
- Pulmonaria officinalis Bloody-butcher
- Pulsatilla Pasqueflower
- Pulsatilla bungeana
- Pulsatilla chinensis Northeast Asian pasque-flower
- Pulsatilla flavescens
- Pulsatilla koreana Korean pasque-flower
- Pulsatilla pratensis Meadow Pasqueflower
- Pulsatilla vulgaris European Pasqueflower
- Punica granatum pomegranate
- Purshia glandulosa desert bitterbrush
- Putranjiva
- Pyrola calliantha Chinese Pyrola
- Pyrola decorata
- Pyrola japonica East Asian wintergreen
- Pyrola rotundifolia
- Pyrus communis Common Pear