Petiole base dilated into stipulelike projections; leaflet blade base rounded or subcordate; sepals white or dark purple; anther apiculus 0.5--1 mm.

• 叶柄基部膨大成托叶状凸出的；小叶叶片基部圆形或近心形；萼片白色的或深紫色；花药细尖的0.；5--1毫米(89