Leaves distichous ; leaf blade margin usually serrulate .

叶2列；叶片边缘通常有细锯齿。

Racemes rather spaced on inflorescence axis , strictly distichous ; lemmas usually pubescent .

在花序轴上密集的总状花序，通常不严格2列。

Leaves alternate , distichous , petiolate , simple , penninerved , margin serrulate or entire .

叶互生，二列，具叶柄，单叶，羽状脉，边缘有齿或者全缘。

Leaves mostly basal , distichous or sometimes polystichous , sheathing ; leaf blade ensiform , linear , or filiform .

叶多数基生，二列或有时多列，有鞘；叶片剑，线形或者丝状。

Leaves alternate , usually distichous ; stipules entire or denticulate , usually caducous ; petiole short ; leaf blade simple , margin entire , venation pinnate .

叶互生，通常2列；托叶全缘或者具细牙齿，通常早落；叶柄短单叶，边缘全缘，羽状脉。