Parnassia palustris
Grass-of-Parnassus
Pastinaca sativa
Wild Parsnip
Pedicularis palustris
Marsh Lousewort
Pedicularis sylvatica
Lousewort
Pellia endiviifolia
Pellia spp.
Peltigera collina
Dog Lichen
Peltigera horizontalis
Dog Lichen
Peltigera spp.
Dog Lichen
Pentaglottis sempervirens
Green Alkanet
Persicaria amphibia
Amphibious Bistort
Persicaria bistorta
Common Bistort
Persicaria hydropiper
Water-pepper
Persicaria maculosa
Redshank
Persicaria minor
Small Water-pepper
Persicaria vivipara
Alpine Bistort
Persicaria wallichii
Himalayan Knotweed
Petasites fragrans
Winter Heliotrope
Petasites hybridus
Butterbur
Petasites japonicus
Giant Butterbur
Petrorhagia prolifera
Proliferous Pink
Phacelia tanacetifolia
Phacelia
Phalaris arundinacea
Reed Canary-grass
Phalaris canariensis
Canary-grass