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Perennial, laxly tufted (erect) or rhizomatous (rhizomes short and branched), up to 0.9 m high. Leaves mainly basal, leaf blades up to 160 mm long, setaceous. Spikelets 10.0-14.5 mm long (excluding awns). Inflorescence narrow; spikelets few; glumes 10 mm or longer, glabrous; lemma tuberculate just below articulation point, articulation between apex of lemma and base of column; column well developed and plumed in upper half of its length, with hairs longer than 1.5 mm; only central awn plumose, usually hairy to branching point but not apex, diverging at right angles from column; callus 1.0-1.5 mm long, with short hairs along entire length and long hairs at junction of lemma and callus, with a pungent, naked tip.
Laxly tufted perennial to 900 mm high, erect; rhizomes short, branched; leaves mainly basal. Leaf blade to 160 mm long, setaceous. Inflorescence narrow; spikelets few. Spikelet 10.0-14.5 mm long; glumes 10 mm or longer, glabrous; lemma tuberculate just below articulation point, articulation between apex of lemma and base of column; column well developed and plumed in upper half of its length, hairs longer than 1.5 mm; only central awn plumose, usually hairy to branching point but not the apex, diverging at right angles from the column; callus 1.0-1.5 mm long, with short hairs along the entire length and long hairs at the junction of lemma, apex naked, pungent; anther 3.7-4.7 mm long.
