whorl

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，但花丝不长且花药不开裂。

Leaves basal and cauline, alternate, rarely opposite or whorled, simple or variously compound, palmately nerved, rarely penninerved, with or without stipules.

叶茎，互，很少对或者轮，单叶或者复叶，掌状叶脉，很少羽状脉，有或无托叶。

Any of several New World aquatic herbs of the genus Cabomba, having entire, alternate floating leaves and finely divided, opposite or whorled submersed leaves.

常见水草木植物（莼菜莼菜属），长有漂浮的椭圆形或卵形叶片紫色的花