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False panicle 30–40 cm long, narrow, dense, of up to 8 fastigiate tiers one above the other; spatheoles 3–4 cm long, linear, at length reddish-brown, embracing the base of the racemes; peduncle up to half as long as the spatheole, with or without spreading white hairs above; racemes 8–10 mm long, 2-awned per pair, greenish or pallid, laterally exserted, not deflexed; raceme-bases unequal, the superior 4–7 mm long, filiform, glabrous.
Sessile spikelets 5.5–7 mm long; callus 1.5–2 mm long, rarely longer, pungent; inferior glume narrowly lanceolate, 9-nerved with the inner 3–5 nerves ± raised and scaberulous, glabrous; awn 4–4.5 cm long, the column coarsely hirsute with rufous hairs 3–5 mm long.
Pedicelled spikelets 3.5–5 mm long, linear-lanceolate, glabrous, terminating in an awn-point 1–2 mm long; callus absent; pedicel-tooth c. 0.1 mm long, subulate.
Homogamous spikelets 3–5 mm long, narrowly lanceolate, a single pair at the base of each raceme.
Leaf sheaths glabrous; leaf laminas up to 30 cm × 4 mm, scaberulous.
Inflorescence narrow, dense, of up to 8 fastigiate tiers
Annual; culms up to 200 cm high.
Annual up to nearly 2 m. high
