Culms to 2.5 m, 0.2–0.8 cm in diam.; internodes initially yellow-green, finely striate, 15–26 cm, initially yellow-brown or brown strigose and white pubescent, especially below nodes, rough with tubercles and imprints of fallen hairs at maturity; wall 1.5–3 mm thick; nodes elevated; sheath scar usually edged with a suberous ring left by fallen sheath; intranode 3–7 mm. Culm sheaths initially usually red-brown or dull green, 1/3–1/2 as long as internodes, rigid, brittle, completely minutely white pubescent except for distal 1/4 part also yellow-brown or brown strigose and with imprints of fallen hairs, margins brown ciliate; auricles purple when fresh, dark purple or brown when dry, falcate; oral setae yellow-brown; ligule truncate or arcuate, 0.5–1 mm, densely puberulent, entire or denticulate and minutely ciliate; blade erect or reflexed, green or yellow, linear-lanceolate, tessellations distinct on both surfaces, base much narrower than sheath apex, margins scabrous. Leaves 2–5 per ultimate branch; sheath glabrous or white pubescent, sometimes sparsely strigose, margins ciliate; auricles purple; oral setae yellow-brown, both weakly developed or absent on upper sheaths; ligule dark purple, truncate or arcuate, 1–1.5 mm, densely puberulent, entire; blade oblong-lanceolate, 10–29 × 3.5–7.5 cm, both surfaces glabrous, abaxially with pale or yellow powdery granules, secondary veins 6–14 pairs, tessellations square, base rounded or cuneate. Panicle 5–11 cm, dense, axis and branches densely white pubescent. Branches ascending, not pulvinate, subtended by minute bracts. Spikelets purple or green, 1–2.5 cm; florets 3–5. Rachilla internodes densely white pubescent. Glumes 2, glabrous, apex acuminate; lower glume 2–2.5 mm, (3–)5(–7)-veined; upper glume 6–8.5 mm, 5(–7)-veined; lemma ovate-lanceolate, 7.5–10 mm, glabrous, 7–11-veined, apex acuminate, mucronate, callus puberulent; palea keels glabrous. Stamens and pistil unknown. New shoots Jun, fl. Aug–Sep.
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