Pogonatum aloides
Aloe Haircap
Polemonium caeruleum
Jacob's-ladder
Polemonium pauciflorum
Fewflower Jacob's-ladder
Polygala calcarea
Chalk Milkwort
Polygala serpyllifolia
Heath Milkwort
Polygala vulgaris
Common Milkwort
Polygonatum multiflorum
Solomon's-seal
Polygonatum odoratum
Angular Solomon's-seal
Polygonatum x hybridum
Garden Solomon's-seal
Polygonum arenastrum
Equal-leaved Knotgrass
Polygonum aviculare
Knotgrass
Polygonum oxyspermum
Ray's Knotgrass
Polyommatus icarus
Common Blue
Polypodium cambricum
Southern Polypody
Polypodium interjectum
Intermediate Polypody
Polypodium vulgare
Polypody
Polypodium vulgare sens. lat.
Polypody
Polypogon viridis
Water Bent
Polyporus squamosus
Dryad's Saddle
Polystichum aculeatum
Hard Shield-fern
Polystichum lonchitis
Holly-fern
Polystichum setiferum
Soft Shield-fern
Polytrichum commune
Common haircap
Polytrichum juniperinum
Juniper Haircap
Polytrichum piliferum
Populus nigra
Black-poplar
Populus tremula
Aspen
Populus x canadensis
Hybrid Black-poplar
Populus x canescens
Grey Poplar
Potamogeton coloratus
Fen Pondweed
Potamogeton crispus
Curled Pondweed
Potamogeton lucens
Shining Pondweed
Potamogeton natans
Broad-leaved Pondweed
Potamogeton polygonifolius
Bog Pondweed
Potentilla anserina
Silverweed
Potentilla erecta
Tormentil
Potentilla indica
Yellow-flowered Strawberry
Potentilla reptans
Creeping Cinquefoil
Potentilla rupestris
Rock Cinquefoil
Potentilla sterilis
Barren Strawberry
Potentilla verna
Spring Cinquefoil
Poterium sanguisorba
Salad Burnet
Preissia quadrata
Primula elatior
Oxlip
Primula veris
Cowslip
Primula vulgaris
Primrose
Primula x polyantha
False Oxlip
Prunella vulgaris
Selfheal
Prunus avium
Wild Cherry
Prunus cerasifera
Cherry Plum
Prunus domestica
Wild Plum
Prunus laurocerasus
Cherry Laurel
Prunus padus
Bird Cherry
Prunus spinosa
Blackthorn
Pseudofumaria lutea
Yellow Corydalis
Pseudorchis albida
Small-white Orchid
Pseudotsuga menziesii
Douglas Fir
Pteridium aquilinum
Bracken
Pterogonium gracile
Bird's-foot Wing-moss
Ptilidium ciliare
Ciliated Fringewort
Puccina coronata
Crown Rust
Puccinia chaerophyllae
Puccinia iridis
Pulicaria dysenterica
Common Fleabane
Pulmonaria officinalis
Lungwort
Pulsatilla vulgaris
Pasqueflower
Pyrola minor
Common Wintergreen
Pyrola rotundifolia
Round-leaved Wintergreen
Pyrus communis
Pear
Pyrus pyraster
Wild Pear