hoary, P. media 北车前
ribwort, P. lanceolata 长叶车前
poison ivy, Rhus radicans 毒漆藤
poppy, corn, or common, Papaver rhoeas 虞美人
opium, P. somniferum 罂粟
prickly pear, Opuntia ficus-indica 仙人掌
primrose, Primula vulgaris 欧报春
privet, garden, Ligustrum ovalifolium 卵叶女贞
wild, L. vulgare 普通女贞
purple-loosestrife, Lythrum salicaria 千屈菜