Anthers sessile, circular, 2-loculed, introrse, connate into a synandrium, dehiscence longitudinal.

花，圆，2室，内向，合生的成为聚，开纵向。

Anthers 6, opposite perianth segments, attached at lobe sinus, lobelet sinus, or lobe apex of corona, dorsifixed, introrse.

花6，对生于花被，附着凹缺，小凹缺，或副花冠先端的，背着，内向。