Tufted annual to 400 mm high. Leaf blade to 150 x to 4 mm. Inflorescence 30-80 mm long; lowest branches not whorled; pedicels stout. Spikelet to 8 x 6-7 mm; strongly laterally flattened, sides appear jagged; disarticulating below glumes at maturity, falling entire as a unit; glumes subequal, keeled; lemma lanceolate in profile, keel winged, scabrid, lateral nerves distinct; palea keels ± thickened, broadly winged, usually irregularly lacerate (jagged), protruding laterally from lemma; anthers 3, 0.5 mm long; caryopsis elliptic to broadly elliptic.
Caespitose annual; culms up to 40 cm tall, erect or ascending, unbranched, glabrous at the nodes, eglandular; leaf sheaths glabrous, eglandular; ligule a line of hairs; leaf laminas 2.5–15 cm × 2–4 mm, linear, flat or involute, glabrous, firm and somewhat glaucous.
Panicle 3–8 cm long, narrowly oblong, subracemose but the lower branches bearing 2–3 imbricate spikelets on stout pedicels 1–5 mm long, the primary branches not in whorls, terminating in a fertile spikelet, loosely pilose in the axils, eglandular.
Caryopsis 1.2–1.5 mm long, elliptic to broadly elliptic.