Inflorescence terminal or rarely axillary , a thyrse or panicle , very rarely flowers solitary .
花序顶生或很少腋生的，聚伞圆锥花序或圆锥花序的，极少花单生。
Flowers usually unisexual ( when plants dioecious , rarely monoecious ) , sometimes bisexual , solitary , clustered , or in cymules , these in a spike , raceme , or thyrse , these sometimes grouped into panicles .
