or perennial grasses, culms tufted or with creeping rhizomes or stolons. Leaf-blades linear to linear-lanceolate,
ligules membranous. Inflorescence of spike-like racemes, single or digitate or
racemosely arranged, rachis triquetrous. Spikelets orbicular, secund,
plano-convex, 2-4 rowed, disarticulating below glumes; glumes unequal, lower
glume absent, upper glume herbaceous, as long as spikelets; lower floret
sterile, upper floret perfect; lower lemma herbaceous, flat; upper lemma indurate,
margin inrolled; palea usually absent in lower floret. Lodicules 2, truncate.
Stamens 3. Caryopsis elliptic to orbicular.