Milkwort intervove with climbing fig, which had fruit shaped like the calyx of a lotus, while the milkwort had swollen tubers. 何首乌藤和木莲藤缠络着,木莲有莲房一般的果实,何首乌有臃肿的根。
Polygala is a large genus of flowering plants belonging to the family Polygalaceae. They are commonly known as milkworts or snakeroots. The genus is distributed widely throughout much of the world in temperate zones and the tropics. The genus name Polygala comes from the ancient Greek "much milk", as the plant was thought to increase milk yields in cattle.