Green vegetables, alias Cirsium japonicum, Sargassum spinosum, Crocodile, Stipa grandiflora and other Latin scientific names, are perennial herbs with creeping rhizomes and a height of 15 ~ 50 cm. It grows at an altitude of 140 m to 2650 m, and is generally born in wasteland, grassland, hillside forest, roadside, shrub, field, forest edge and stream side. It is artificially cultivated for medicinal purposes. Distributed in most parts of China, Central and Eastern Europe, eastern Russia, Japan, North Korea, etc.