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Perennial, rarely annual, up to 0.8 m tall. Leaves linear; ligule a fringe of hairs. Inflorescence a dense, cylindrical, spike-like panicle. Spikelets 4-5.5 mm long; strongly laterally compressed, falling entirely, silvery often purple, 2-4-flowered, awned, awns not twisted below; glumes ± equal, as long as spikelet (including awn), densely hairy on keels, 1-nerved; lemmas 4-7 mm long (excluding awns).
Perennial or sometimes annual (in arid areas), 100-910 mm high; roots slender; basal sheaths dull. Leaf blade 25-400 x 2-4 mm. Inflorescence spike-like, 15-50 mm long; pedicels short, thick. Spikelet 4.0-5.5 mm long; glume keel densely long hairy, these hairs up most of the keel; lemma apex rounded, awned; anther 2.0-2.5 mm long.
Perennial; sometimes annual; up to 0.9 m high; rhizome slender. Leaf blades 25-400 x 2-4 mm; basal sheaths dull. Flowers: panicle spike-like; 15-50 mm long; spikelets 4.0-5.5 mm long; glumes with stiff; dense hairs on keels; hairs 1 mm long; lemma apex rounded.
Perennial (sometimes annual), rhizomatous, up to 0.9 m high. Leaf blades 25-400 mm long, 2-4 mm wide. Spikelets 4.0-55 mm long. Panicle spike-like, 15-50 mm long; glumes with stiff dense hairs on keels; lemma apex rounded.
Perennial, sometimes annual to 80 cm. Leaves linear. Spikelets in a dense spike-like raceme or panicle, silvery and purple, glumes densely hairy, lemmas obtuse-awned.
