Persicaria mitis
Tasteless Water-pepper
Petasites pyrenaicus
Winter Heliotrope
Petrosedum forsterianum
Rock Stonecrop
Phacelia tanacetifolia
Phacelia
Phalaris arundinacea
Reed Canary-grass
Phegopteris connectilis
Beech Fern
Philadelphus coronarius
Mock-orange
Phuopsis stylosa
Caucasian Crosswort
Physalis peruviana
Cape-gooseberry
Picris hieracioides
Hawkweed Oxtongue
Pilosella aurantiaca
Fox-and-cubs
Pilosella officinarum
Mouse-ear-hawkweed
Pilularia globulifera
Pillwort
Pimpinella saxifraga
Burnet-saxifrage
Plantago lanceolata
Ribwort Plantain
Platanus x hispanica
London Plane
Polygala serpyllifolia
Heath Milkwort
Polygala vulgaris
Common Milkwort
Polygonatum verticillatum
Whorled Solomon's-seal
Polygonum arenastrum
Equal-leaved Knotgrass
Polygonum aviculare
Knotgrass
Polygonum oxyspermum
Ray's Knotgrass
Portulaca oleracea
Common Purslane
Potamogeton lucens
Shining Pondweed