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Annual or short-lived perennial; up to 0.6 m high; loosely tufted. Leaf blades 10-70 x 3-12 mm; margins wavy; with neatly spaced hairs; blue-green; dry leaves curled. Flowers: inflorescence a single raceme; spikelets 1.2-2.7 mm long; base flat or rounded; not elongated into a stipe; glumes with purple awns; awns 9-17 mm long.
Loosely tufted, short-lived perennial or annual 200-600 mm high. Leaf blade 10-70 x 3-12 mm. Inflorescence 40-185 mm long. Spikelet 1.2-2.7 mm long; glumes finely scabrid, both awns 9-17(25) mm long, purple or red; callus indistinct, not stipe-like; anther 0.5-0.7 mm long; caryopsis 0.5-2.0 mm long.
Short-lived perennial or annual, loosely tufted, up to 0.6 m high. Leaf blades 10-70 mm long, 3-12 mm wide. Spikelets 1.2-2.7 mm long, spikelet base flat or rounded, not elongated into a stipe; glumes with purple awns 9-17 mm long.
Spikelets 2–2.6 mm long, rounded at the base and without a definite callus; glumes scaberulous to minutely hispidulous, with a slender, purple or carmine, flexuous awn, those of the 2 glumes similar, 8–15(25) mm long.
Annual or short-lived perennial up to 90(150) cm tall, tough and wiry, geniculately ascending; leaf laminas 2–8(11) cm × 3–12 mm, lanceolate to narrowly ovate.
Inflorescence 7–35 cm long, well exserted from the uppermost leaf sheath, the spikelets densely packed and ascending or horizontally spreading.
Caryopsis terete.
