stamen

1.Stamens 5 to many, adnate with perigone.

雄5到很多，贴生于花。

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

雄5到多数，离生或着生于花筒部。

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

雄4，花冠筒，稍外露的二强雄，着生的在中部。

4.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雌；两性花之雄正常发育，但花丝不伸长且花药不开裂。