Leaves opposite , usually decussate , sessile or subsessile , membranous .
叶对生，通常交互对生，无柄或近无柄，膜质。
Leaves opposite , decussate ; capsule walls spongy , dehiscence sometimes very delayed .
叶对生，交互对生；海绵状的蒴果壁，开裂有时非常延误。
Leaves opposite , decussate , sessile or subsessile ; leaf blade mostly lanceolate , margin entire or serrate .
叶对生，交互对生，无柄或近无柄；多数披针形的叶片，边缘全缘或有锯齿。
Opposite phyllotaxis may be either disticbous or decussate depending on whether the leaf pairs are in the same plane up the stem or arise alternately at right angles to each other .
