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False panicle 20–50 cm long, loose; spatheoles 3–7 cm long, narrowly lanceolate, glaucous to purplish, glabrous; peduncles 1–3.5 cm long, glabrous or shortly and softly hirsute above, often recurved; racemes 1.5–2.5 cm long, 3–6-awned per pair, deflexed; raceme-bases slightly unequal, the superior 1.5–2 mm long, flattened, glabrous (except in the fork), truncate at the apex and lacking appendages.
Sessile spikelets 6.5–7.5 mm long; callus c. 1.5 mm long, sharply acute; inferior glume narrowly lanceolate, glabrous or less commonly pubescent to tomentose; awns 4.5–7.5 cm long, the column subplumose with white or fulvous hairs 0.5–1.3(1.7) mm long.
Homogamous spikelets 8–10 mm long, two pairs at the base of each raceme forming a kind of involucre, glabrous or rarely sparsely pubescent on the back, scabrid on the margins, initially green but becoming purplish, awnless.
Leaf sheaths glabrous or rarely pilose towards the summit; leaf laminas 20–60 cm × 3–10 mm, glaucous, glabrous or sparsely pilose below, usually with greyish hairs near the base.
Pedicelled spikelets 7–8 mm long, narrowly lanceolate, glabrous, terminating in a bristle 2–7 mm long; callus scarcely developed; pedicel-tooth obscure.
Robust perennial; culms up to 300 cm high, erect.
Robust perennial 2–3 m. high
