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

花药无梗，圆，2室，内向，合生的成为聚药，开裂纵向。

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

花药6，对生于花被片，附着在裂片凹缺，小裂片凹缺，或副花冠裂片先端的，背着，内向。