stamen

Stamens 5 to many, adnate with perigone.

雄蕊5到很多，生于花被。

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

雄蕊5到多数，离生或着生于花被筒部。

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

雄花具有发育不完蕊；两性花雄蕊虽然正常发育，但花丝不伸长且花药不开裂。