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

卷须不分枝或二。的花序一多歧聚伞花序。种子椭圆，倒卵球椭圆，或倒三角的，平滑的表面，具皱褶，或具瘤状的突起或肋。

The VERL, a giant, unbranched glycoprotein comprising 30% of the VE, exists in the vitelline envelope and fuses with lysin by species-specificity.

鲍卵膜上存在素受体，它是大的不分支的糖蛋白分子，占据了卵黄膜30％的组分，可以专一性地与素相结合。