Perennial, with slender rhizomes. Culms very slender, decumbent at base, 20–60 cm tall. Leaf sheaths glabrous; leaf blades 3–13 × 0.2–0.5 cm, scabrid, glabrous or thinly hispid with long, fine, tubercle-based hairs, apex filiform; ligule ca. 0.5 mm, ciliolate. Compound panicle sparse, composed of single racemes arising from upper leaf axils, usually subtended only by a spatheole without accompanying spathes; spatheoles linear, 3–6 cm, glabrous; peduncle glabrous. Raceme composed of 1–2 spikelet pairs and a terminal triad above the involucre of 2 homogamous pairs. Homogamous spikelets arising at different levels, staminate, 12–18 mm, lanceolate with narrow lateral wings, glabrous or thinly hispid. Sessile spikelet 4.5–5.5 mm; callus ca. 1.5 mm, narrowly cuneate; lower glume pallid, dorsally compressed, shortly pubescent especially near apex or subglabrous; awn 2.5–4 cm, weakly geniculate. Pedicelled spikelet 10–11 mm. Fl. and fr. Jun–Nov.
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