Platanthera chlorantha
Greater Butterfly-orchid
Platanthera chlorantha and bifolia
Platanthera x hybrida
Platanus orientalis
Oriental Plane
Platanus x hispanica
London Plane
Platycerium bifurcatum
Elkhorn Fern
Platycerium coronarium
Elkhorn fern
Platycerium grande
Giant Staghorn Fern
Pleroma semidecandrum
Princess Flower
Pluchea indica
Indian Camphorweed
Plumbago auriculata
Cape Leadwort
Plumeria alba
Caterpillar Tree
Plumeria obtusa
Frangipani
Poa annua
Annual Meadow-grass
Podocarpus macrophyllus
Yew Plum Pine
Polemonium pauciflorum
Fewflower Jacob's-ladder
Polygala calcarea
Chalk Milkwort
Polygala fruticosa
Feather Dusters
Polygala serpyllifolia
Heath Milkwort
Polygala vulgaris
Common Milkwort
Polygonatum multiflorum
Solomon's-seal
Polygonatum odoratum
Angular Solomon's-seal
Polygonatum verticillatum
Whorled Solomon's-seal
Polygonatum x hybridum
Garden Solomon's-seal
Polygonum arenastrum
Equal-leaved Knotgrass
Polygonum oxyspermum
Ray's Knotgrass
Polypodium cambricum
Southern Polypody
Polypodium interjectum
Intermediate Polypody
Polypodium vulgare
Polypody
Polypogon viridis
Water Bent
Polyscias fruticosa
Ming Aralia
Polyscias guilfoylei
Geranium Aralia
Polyscias scutellaria
Shield Aralia
Polystichum aculeatum
Hard Shield-fern
Polystichum setiferum
Soft Shield-fern
Polytrichum commune
Common haircap
Pontederia crassipes
Water Hyacinth
Populus nigra
Black-poplar
Populus tremula
Aspen
Populus x canadensis
Hybrid Black-poplar
Populus x canescens
Grey Poplar
Portulaca oleracea
Common Purslane
Portulaca quadrifida
Pusley
Potamogeton crispus
Curled Pondweed
Potamogeton lucens
Shining Pondweed
Potamogeton natans
Broad-leaved Pondweed
Potamogeton polygonifolius
Bog Pondweed
Potentilla anserina
Silverweed
Potentilla erecta
Tormentil
Potentilla nitida
Pink Cinquefoil
Potentilla reptans
Creeping Cinquefoil
Potentilla rupestris
Rock Cinquefoil
Potentilla sterilis
Barren Strawberry
Poterium sanguisorba
Salad Burnet
Preissia quadrata
Primula elatior
Oxlip
Primula farinosa
Bird's-eye Primrose
Primula veris
Cowslip
Primula vulgaris
Primrose
Primula x polyantha
False Oxlip
Procris repens
Watermelon Begonia
Prosopis juliflora
Long-thorn Kiaw
Protea cynaroides
King Protea
Prunus avium
Wild Cherry
Prunus cerasifera
Cherry Plum
Prunus domestica
Wild Plum
Prunus padus
Bird Cherry
Prunus spinosa
Blackthorn
Pseudofumaria alba
Pale Corydalis
Pseudofumaria lutea
Yellow Corydalis