Spikelets with proximal incomplete florets . Female-fertile florets 1. Palea absent . Styles basally fused. Abaxial leaf blade epidermis .
Subsidiaries tall triangular, or dome-shaped.
Guard-cells overlapping to flush with the interstomatals. Costal short-cells conspicuously in long rows. Transverse section of leaf blade, physiology . Leaf blade with distinct, prominent adaxial ribs, or adaxially flat. Many of the smallest vascular bundles unaccompanied by sclerenchyma, or all the vascular bundles accompanied by sclerenchyma.