Phragmites australis
Common Reed
Phuopsis stylosa
Caucasian Crosswort
Phymatosorus scolopendria
Monarch Fern
Physcia aipolia
Physoplexis comosa
Tufted Horned Rampion
Picris hieracioides
Hawkweed Oxtongue
Pilosella aurantiaca
Fox-and-cubs
Pilosella officinarum
Mouse-ear-hawkweed
Pilularia globulifera
Pillwort
Pimpinella saxifraga
Burnet-saxifrage
Pinguicula grandiflora
Large-flowered Butterwort
Pinguicula lusitanica
Pale Butterwort
Pinguicula vulgaris
Common Butterwort
Pinus sylvestris
Scots Pine
Piptoporus betulinus
Birch Polypore
Pistia stratiotes
Water Cabbage
Plagiogyria glauca
Blue Plagiogyria
Plantago coronopus
Buck's-horn Plantain
Plantago lanceolata
Ribwort Plantain
Plantago maritima
Sea Plantain
Plantago media
Hoary Plantain
Platanthera bifolia
Lesser Butterfly-orchid
Platanthera chlorantha
Greater Butterfly-orchid
Platanus orientalis
Oriental Plane
Platycerium bifurcatum
Elkhorn Fern
Platycerium grande
Giant Staghorn Fern
Plumeria obtusa
Frangipani
Poa annua
Annual Meadow-grass
Podranea ricasoliana
Pink Trumpet Vine
Polygala serpyllifolia
Heath Milkwort
Polygala vulgaris
Common Milkwort
Polygonatum verticillatum
Whorled Solomon's-seal
Polypodium cambricum
Southern Polypody
Polypodium interjectum
Intermediate Polypody
Polypodium vulgare
Polypody
Polystichum setiferum
Soft Shield-fern
Polytrichum commune
Common haircap
Polytrichum juniperinum
Juniper Haircap
Populus nigra
Black-poplar
Populus tremula
Aspen
Populus x canadensis
Hybrid Black-poplar
Portulaca umbraticola
Wingpod Purslane
Potamogeton lucens
Shining Pondweed
Potentilla anserina
Silverweed
Potentilla reptans
Creeping Cinquefoil
Potentilla rupestris
Rock Cinquefoil
Potentilla sterilis
Barren Strawberry
Poterium sanguisorba
Salad Burnet
Primula elatior
Oxlip
Primula veris
Cowslip
Primula vulgaris
Primrose
Primula x polyantha
False Oxlip
Prunus avium
Wild Cherry
Prunus domestica
Wild Plum
Prunus padus
Bird Cherry
Prunus spinosa
Blackthorn
Pseuderanthemum maculatum
Ruspolia
Pseudofumaria lutea
Yellow Corydalis
Pseudorchis albida
Small-white Orchid
Pseudotsuga menziesii
Douglas Fir
Pteridium aquilinum
Bracken
Ptisana fraxinea
Pitted Potato Fern
Pulicaria dysenterica
Common Fleabane
Pulsatilla vulgaris
Pasqueflower
Pyrola minor
Common Wintergreen
Pyrola rotundifolia
Round-leaved Wintergreen
Quercus cerris
Turkey Oak
Quercus petraea
Sessile Oak
Quercus robur
Pedunculate Oak
Quercus rubra
Red Oak