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。的花序一多歧聚伞花序。子椭圆，卵球椭圆，三角的，平滑的表面，具皱褶，具瘤状的突起肋。