unisexual

Flowers radially symmetric, bisexual or unisexual, hypogynous, perigynous, or epigynous;

花辐射对称，单两或，，周位，上位或；

(两，雌雄株植株，雌花两花株或很少)单花两或，雄不相等5瓣；

Inflorescences corymbiform-umbellate, many flowered, bracteate.Flowers bisexual or unisexual (plants hermaphroditic, dioecious, or rarely gynodioecious), male ones unequally 5-merous;