Papaver cambricum
Welsh Poppy
Papaver rhoeas
Common Poppy
Parentucellia viscosa
Yellow Bartsia
Parietaria judaica
Pellitory-of-the-wall
Paris quadrifolia
Herb-paris
Pedicularis palustris
Marsh Lousewort
Pedicularis sylvatica
Lousewort
Persicaria amphibia
Amphibious Bistort
Persicaria lapathifolia
Pale Persicaria
Persicaria maculosa
Redshank
Persicaria mitis
Tasteless Water-pepper
Petasites hybridus
Butterbur
Petasites japonicus
Giant Butterbur
Petasites pyrenaicus
Winter Heliotrope
Petrosedum forsterianum
Rock Stonecrop
Phalaris arundinacea
Reed Canary-grass
Phegopteris connectilis
Beech Fern
Phleum arenarium
Sand Cat's-tail
Phleum bertolonii
Smaller Cat's-tail
Phragmites australis
Common Reed
Picea sitchensis
Sitka Spruce
Picea smithiana
Morinda Spruce
Picris hieracioides
Hawkweed Oxtongue
Pilosella officinarum
Mouse-ear-hawkweed