Tufted perennial to c. 1 m high.
Leaves with orifice often with hairs to 4 mm long; ligule a ciliate rim with hairs to 0.5 mm long; blade flat or rolled, to 3 mm wide, glabrous or with hairs to 1 mm long.
Inflorescence open or contracted, 13–30 cm long, 2.5–10 mm wide; axils of primary branches glabrous or with hairs 0.5–3 mm long; pedicels 0.5–4 mm long. Spikelets 4–10 mm long, 1–2 mm wide, florets 4–14; rachilla with hairs < 0.25 mm long. Glumes 1.5–2.5 mm long, acute, glabrous; lower glume often narrower and 75% length of upper. Lemmas 2–2.5 mm long, acute, usually scabrous, keeled, lateral nerve closer to margins than midnerve. Palea subequal to lemma.