Perennial. Culms usually tufted, many-noded. Leaf blades linear or linear-lanceolate, often inrolled when dry, lower blades usually disarticulating from the sheaths; ligule a line of hairs, sometimes on a very short membranous base. Inflorescence of often few-spiculate lax racemes spaced along a central axis, or a sparsely branched panicle, spikelets distant or loosely imbricate, shortly pedicellate; axillary cleistogamous spikelets also present concealed within the upper leaf sheaths. Spikelets laterally compressed, florets 1 to several, loosely spaced, rachilla slender, disarticulating above glumes and between florets, rachilla internodes pubescent at apex; glumes membranous, very unequal with the lower shorter, 1–5(–7)-veined; lemmas narrowly lanceolate to ovate, 3–5(–7)-veined, keeled, usually pubescent near margins, apex narrow, bidenticulate or rarely entire, acute, mucronate or shortly awned; palea keels glabrous or ciliolate. Floret callus shortly bearded. Anthers 3, linear.
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