Platanthera x hybrida
Platanus orientalis
Oriental Plane
Platanus x hispanica
London Plane
Platycerium bifurcatum
Elkhorn Fern
Platycerium coronarium
Elkhorn fern
Platycodon grandiflorus
Balloon#Flower
Pleione formosana
Pleione
Pleroma heteromallum
Silverleafed Princess Flower
Pleroma semidecandrum
Princess Flower
Pleroma urvilleaum
Glory Bush
Pluchea dioscoridis
Vimba
Plumbago auriculata
Cape Leadwort
Plumeria alba
Caterpillar Tree
Plumeria obtusa
Frangipani
Plumeria pudica
Bridal Bouquet
Plumeria rubra
Frangipani
Poa annua
Annual Meadow-grass
Poa compressa
Flattened Meadow-grass
Poa humilis
Spreading Meadow-grass
Poa trivialis
Rough Meadow-grass
Podocarpus macrophyllus
Yew Plum Pine
Podranea ricasoliana
Pink Trumpet Vine
Pogonatum aloides
Aloe Haircap
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 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 aviculare
Knotgrass
Polygonum oxyspermum
Ray's Knotgrass
Polypodium cambricum
Southern Polypody
Polypodium interjectum
Intermediate Polypody
Polypodium vulgare
Polypody
Polypodium vulgare sens. lat.
Polypody
Polypogon viridis
Water Bent
Polyscias fruticosa
Ming Aralia
Polyscias guilfoylei
Geranium Aralia
Polystichum aculeatum
Hard Shield-fern
Polystichum lonchitis
Holly-fern
Polystichum setiferum
Soft Shield-fern
Polytrichum commune
Common haircap
Polytrichum juniperinum
Juniper Haircap
Polytrichum piliferum
Pontederia crassipes
Water Hyacinth
Populus nigra
Black-poplar
Populus tremula
Aspen
Populus x canadensis
Hybrid Black-poplar
Populus x canescens
Grey Poplar
Portulaca grandiflora
Rose Moss
Portulaca oleracea
Common Purslane
Portulaca quadrifida
Pusley
Portulaca umbraticola
Wingpod Purslane
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 gracilis
Graceful Cinquefoil
Potentilla indica
Yellow-flowered Strawberry
Potentilla nitida
Pink Cinquefoil
Potentilla reptans
Creeping Cinquefoil
Potentilla rupestris
Rock Cinquefoil