Culms tufted, erect or slightly decumbent at base, 25–35 cm tall. Leaf sheaths glabrous but pilose at mouth; leaf blades narrowly linear, flat or involute, ascending, 3–10 × ca. 0.2 cm; ligule short. Panicle narrow, 5–9 cm, lowest branch 2–4 cm. Spikelets 7–9 mm, florets 3–4; glumes lanceolate, 1-veined; lower glume 2–4 mm; upper glume 4–5 mm; lemmas lanceolate, purplish at margin and apex, lowest 5–6(–7) mm, acute or with a mucro to 0.5 mm; palea slightly shorter than lemma. Anthers ca. 3 mm. Fl. and fr. Jul–Sep.