Flowers unisexual, plants monoecious, rarely dioecious, (1 or)2-4 to several, rarely numerous, in dichotomous cymes, sometimes in panicle, with pedicels and bracts.

• 单性的花，植株雌雄同株，很少雌雄异株，(1或)2-4到数个，很少多数，在二歧的聚伞花序内，有时为圆锥花序，具花梗和苞片。