Culms densely tufted, clothed at base in old sheath remnants, lacking basal scaly buds, erect, wiry, 30–60 cm tall, 0.5–0.8 mm in diam., unbranched. Leaf sheaths longer than internodes, glabrous but pilose at mouth; leaf blades stiff, patent, longest at culm center, here 3–7 × 0.1–0.2 cm, uppermost 1–2 cm, glabrous, adaxial surface and margins scabrid, abaxial surface smooth, lower blades disarticulating; ligule 0.2–0.3 mm. Panicle open, 5–12 cm, exserted from uppermost leaf sheath; branches laxly ascending or spreading, racemose or lower branches with branchlets, lowest branch 4–8 cm. Spikelets oblong, (6–)8–14 mm, yellowish brown or purplish green, florets 3–8; glumes lanceolate, acute; lower glume 1.6–3.5 mm, 1(–3)-veined; upper glume 3.5–4.5 mm, 1–3-veined; lemmas lanceolate, lowest 4–5 mm, loosely pilose near margins; mucro 0.1–0.2 mm; palea keels ciliolate. Anthers 2–3 mm. Fl. and fr. Jul–Sep.
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