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Annual, or short-lived perennial without rhizomes; culms 0.3–4 m. high, often robust, the nodes glabrous or pubescent.. Leaf-blades variable, often large, 5–75 cm. long, 5–70 mm. wide.. Panicle linear to broadly spreading, 10–60 cm. long; primary branches compound, ultimately bearing racemes of 2–7 spikelet pairs.. Sessile spikelet lanceolate to narrowly ovate, 4–9 mm. long, glabrescent to white pubescent, sometimes tomentose or fulvously pubescent, awnless or more often with an awn 5–30 mm. long.. Pedicelled spikelet linear to lanceolate, ♂ or barren, smaller than the sessile.. Fig. 168.
Annual, rarely short-lived perennial; culms 30–400 cm high, robust, branched; nodes mostly glabrous, sometimes pubescent; leaf sheaths glabrous; ligule a membrane, edged with a fringe of fine hairs and hairy on the back; leaf laminas variable, often large, 5–75 cm × 5–7 mm, broadly lanceolate, flat, glabrous on both surfaces, with a prominent whitish midrib.
Pedicelled spikelets neuter, c. 6.5 mm long, linear to lanceolate; glumes chartaceous; inferior glume glabrous; superior glume slightly shorter than the inferior, glabrous; inferior lemma glabrous, with a truncate apex.
Panicle 10–60 cm long, broadly spreading; main axis angular, glabrous; primary branches divided, pubescent at the nodes; racemes 2–7-jointed; rhachis internodes and pedicels pilose.
Annual or perennial 2–3·5 m. high.
