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Loosely tufted, usually robust, short lived perennial or annual 300-900 mm high. Leaf blade 70-200 x 2-4 mm, flat. Inflorescence 150-400 mm long, narrow, sinuous, branches nearly erect. Spikelet 1.5-2.5(-3.0) mm long; rachilla not produced; glumes 1.4-2.5 mm long, persistent, lanceolate, smooth or granular except keel scabrid; lemma pubescent to pilose with hairs up to 1 mm long, rarely glabrous, denticulately obtuse, 3-nerved; awnless or with subapical awn up to 0.5 mm long; palea almost as long as or shorter than lemma; callus hairs up to 1/3 the lemma length; anther 0.5-0.7 mm long.
Annual or short-lived perennial, up to 0.9 m tall. Leaves linear; ligule a long, unfringed membrane. Inflorescence a narrow, dense, sinuous panicle, branches suberect. Spikelets many, 1.5-2.5(-3) mm long, green or flushed purple to straw-coloured, usually gaping, 1-flowered, disarticulating above glumes; glumes subequal, as long as the spikelet, awnless; lemma long hairy, rarely glabrous, occasionally shortly awned, awn 0.5 mm long.
Perennial; short-lived or annual; up to 0.9 m high; usually robust; loosely tufted. Leaf blades 70-200 x 2-4 mm. Flowers: panicle contracted; narrow; sinuous; 150-400 mm long; branches held nearly erect; spikelets 1.5-2.5(-3.0) mm long; close together; lemmas 3-nerved; anthers 0.5-0.7 mm long.
Annual or short-lived perennial to 90 cm. Leaves linear. Spikelets in a narrow, sinuous panicle, 1.5-3 mm long, branches suberect.
