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P (weeds)
Panicum capillare (witchgrass)
Panicum dichotomiflorum (fall panicum)
Parthenocissus quinquifolia (Virginia creeper)
Paspalum dilatatum (dallisgrass)
Passiflora incarnata (passionflower)
Phytolacca americana (common pokeweed)
Physalis angulata (cutleaf groundcherry)
Plantago lanceolata (buckhorn plantain)
Polygonum convolvulus (wild buckwheat)
Polygonum pensylvanicum (Pennsylvania smartweed)
Portulaca oleracea (common purslane)
