Platanus orientalis
Oriental Plane
Platycodon grandiflorus
Balloon#Flower
Pleione formosana
Pleione
Poa annua
Annual Meadow-grass
Poa trivialis
Rough Meadow-grass
Polemonium caeruleum
Jacob's-ladder
Polemonium pauciflorum
Fewflower Jacob's-ladder
Polygala calcarea
Chalk Milkwort
Polygala fruticosa
Feather Dusters
Polygala serpyllifolia
Heath Milkwort
Polygala vulgaris
Common Milkwort
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 aviculare
Knotgrass
Polygonum oxyspermum
Ray's Knotgrass
Populus nigra
Black-poplar
Populus tremula
Aspen
Populus x canadensis
Hybrid Black-poplar
Potamogeton polygonifolius
Bog Pondweed
Potentilla anserina
Silverweed
Potentilla erecta
Tormentil
Potentilla gracilis
Graceful Cinquefoil