unisexual

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

开花辐射对称，单性的两性或，，周位，上位的或；

(两性，雌雄异株的植株，雌花两性花异株的或很少)的单性的花两性或，雄性的不相等5瓣；

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