abstract:Parietaria is a genus of 20–30 species of flowering plants in the family Urticaceae, native to temperate and tropical regions across the world.Flora Europaea: ParietariaAfrican Flowering Plants Database: Parietaria (enter genus name in search box)Flora of North America: ParietariaFlora of China: ParietariaFlora of Pakistan: ParietariaAustralian Plant Name Index: Parietaria