What is "chwinamul"

Chwinamul (also spelled chuinamul or chinamul) is a Korean leaf vegetable. It consists of the leaves of various species of wild flowering plants, including Aster scaber. There are approximately 24 edible varieties in Korea of which most are found on mountains. The leaves have a distinctive scent and their consumption is believed to be healthful, as they are full of protein, calcium, vitamins B1·B2, niacin, and iron. They are often sauteed until they wilt and served as a banchan (side dish), included in dishes such as bibimbap, and even used for medicinal purposes.