1.Flowers small, unisexual (plants dioecious), in di- or trichotomous cymes, axillary, terminal, or opposite leaves;
花小,单性(雌雄异株),在二或三歧式,腋生,顶生,或与叶对生;
2.Panicles large and lax, ca. 20 cm, branches trichotomous;
圆锥花序大和疏松,约厘米,分枝三歧式;