Culms 1–1.7 m, 4–5 mm in diam.; internodes green, terete, or triangular and grooved above branches, 25–30(–40) cm; nodal ridge conspicuously raised; intranode ca. 5 mm. Culm sheaths pale green, densely deciduously white pubescent especially toward base, scabrous between veins; auricles and oral setae absent; ligule convex, 1.5–4 mm, ciliate; blade linear, 3–6 mm, green. Branches 3 per node, 1.5–1.7 cm, 2-to several-noded. Leaves 1 per ultimate branch; blade elliptic-lanceolate, 17–18 × 2.5–3 cm, both surfaces glabrous or abaxially hairy, secondary veins 7–9-paired, base cuneate, margins minutely serrulate, apex caudate-acuminate. Inflorescence unknown. New shoots Jun–Jul. 2n = 48*.
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