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
；两性花之雄虽然正常发育，但花丝不伸长且花药不开裂。
；壳阶；螺环；螺纹型（whorl的复数形式）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；两性花之雄虽然正常发育，但花丝不伸长且花药不开裂。
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