这三种中药商品容易互相混淆,故放在一起加以讨论。粉萆藓本品为薯(?)科多年生草本,茎细长蔓延。叶心(?)形,先端尖,叶柄基部有卷须两条,系托叶所变成,借以经绕他物。夏秋间开绿紫色花,花后结三稜形翅果。 These three kinds of Chinese medicine products are easy to confuse each other, so they are discussed together. This product is a perennial herb of the potato family, and its stems are elongated and spread. The heart of the leaf (?) is shaped, the tip of the tip is pointed, and the tendrils at the base of the petiole are two, and the stipules become so that they can pass around them. In the summer and autumn, green purple flowers bloom, and after the flowers, three-winged samara.