Tendril unbranched or bifurcate. Inflorescence usually a polychasium. Seeds elliptic, obovoid-elliptic, or obtriangular, surface smooth, corrugated, or with strumose protuberance or ribs.

卷须不分枝二叉。花序一多歧聚伞花序。子椭，倒卵球椭，倒三角，平滑表面，具皱褶，具瘤状突起肋。