Stout caespitose or shortly rhizomatous erect perennial, prolifically branching at nodes; branching extravaginal; cataphylls numerous. Leaf-sheath to 10 cm, short hairs below, glabrous above, terminating in a short tuft of hairs. Ligule to 2 mm, erose, truncate. Collar curved. Leaf-blade to 60 cm × 4 mm, flat, abaxially and on margin antrorsely scabrid, adaxially antrorsely scabrid or with long hairs. Culm to 2 m, bambusiform, internodes glabrous, nodes brown, rough. Panicle to 50 cm, subverticillate; branches ascending-spreading; rachis smooth below, scabrid above, branches and pedicels scabrid. Glumes equal, 3-4 mm, narrow, ≈ lemma, green-suffused, spreading at maturity, acuminate, sometimes shortly awned but mostly erose, 3-nerved, nerves scabrid, < awn column. Lemma 3 mm, becoming dark brown at maturity, clothed in long white appressed hairs but tubercular-scabrid beneath and at apex, lobes minute; awn to 35 mm, 1-geniculate or sometimes straight, short stiff hairy, column straight, scabrid, 7-12 mm, arista to 25 mm. Palea 1-1.5 mm, ligulate, c. ½ length of lemma, nerves with a few scattered hairs or glabrous, internerve darker, apex ciliolate. Callus to 0.2 mm, short, blunt and rounded, loosely clothed in short white hairs to 0.5 mm. Lodicules 2, to 1.3 mm, ligulate, ≈ palea. Anthers 3, penicillate and caudate, to 1.8 mm.
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Plants to c. 2 m tall. Culms with numerous branches at each node; nodes (2–) 6–9. Leaves: sheath becoming free from culm, 3–3.5 mm wide (upper sheaths), slightly to moderately ribbed, glabrous; ligule 2–8 mm long, erose or entire; blade often readily deciduous, expanded, 1–3 mm wide, slightly to moderately ribbed, pilose to scabrous, with margins glabrous to pilose to scabrous. Inflorescence 15–60 cm long, contracted to open. Glumes equal to subequal, 3–4 mm long, acute. Callus weakly bent, with white hairs. Lemma 2.7–4 mm long, straw-coloured, becoming black at maturity, with short white hairs scattered over surface; awn 33–53 mm long, weakly once-or twice-geniculate, scabrous, with column (7–) 10–16 (–30) mm long. Palea 30–60% length of lemma.
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