Solanum nigrum (scientific name: Solanum nigrum): Panicum miliaceum, the height of the whole grass is 30-120 cm; Stems erect and multi-branched; Oval or heart-shaped leaves alternate, nearly entire; Small white flowers in summer, cymes 4- 10 flowers; Spherical berries, deep purple when ripe. Berries and leaves are edible, but leaves contain a lot of alkaloids and must be cooked before detoxification. Whole grass can dissipate blood stasis, reduce swelling, and clear away heat and toxic materials.
Almost all over China. Happy to be born in fields, wasteland, near villages. Widely distributed in temperate to tropical regions of Europe, Asia and America.