parrot's-feather, Myriophyllum aquaticum 粉绿狐尾藻
pellitory-of-the-wall, Parietaria judaica 药用墙草
penny-cress, field, Thlaspi arvense 遏蓝菜
peony, Paeonia mascula 芍药
pheasant's-eye, Adonis annua 侧金盏花
pimpernel, blue, Anagallis arvensis. ssp. caerulea 蓝花琉璃繁缕
scarlet, A. arvensis 琉璃繁缕
pineapple-weed, Matricaria discoidea 同花母菊
pirri-pirri-bur, Acaena novae-zelandiae 新西兰芒刺果
plantain, greater, Plantago major 宽叶车前