Stamens 5 to many, adnate with perigone.

雄5到很多，贴生于花被。

Stamens 4, didynamous, inserted at middle of corolla tube, slightly exserted.

雄4，花冠筒，稍外露雄，生在中部。

Stamens 5 to numerous, free or inserted in perigone tube.

雄5到多数，离生或生于花被筒部。

Then five petal primordia arised simultaneously in a whorl arrangement, followed by eight stamen primodia arised and last by pistil primodium.

雄花具有发育不完全之；性花之雄虽然正常发育，但花丝不伸长且花药不开裂。