Culms densely tufted, base with old sheath remnants, lacking basal scaly buds, erect, wiry, 30–45 cm tall, 0.5–0.8 mm in diam., unbranched. Leaf sheaths longer than internodes, glabrous but pilose at mouth; leaf blades flat or involute when dry, ascending to stiffly spreading, 4.5–7 × 0.12–0.2(–0.27) cm, scaberulous especially toward the subulate-involute apex, lower blades disarticulating; ligule ca. 0.5 mm. Panicle lax, slightly flexuose, 7–10 cm, usually shortly exserted from uppermost leaf sheath; branches mostly narrowly ascending, few-spiculate, simple, lowest branch 3–5 cm. Spikelets 6–9 mm, pale green or purple-tinged, florets 2–5; glumes narrowly lanceolate, 1–3(–5)-veined, acuminate; lower glume 1.4–4.3 mm; upper glume (2.5–)3.5–5.7 mm; lemmas narrowly lanceolate, lowest (4.5–)5–6.5 mm, thinly pilose near margins; awn (0.2–)1–2(–2.5) mm; palea keels ciliolate. Anthers 2.2–2.5 mm. Fl. and fr. Aug–Oct.
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