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Tufted perennial 500-1 000(-1 250) mm high. Leaf blade 300-500 x 2-5 mm, expanded. Inflorescence 120-300 mm long, narrow, contracted, usually dense. Spikelet 12-15 mm long (excluding awns), usually closely flowered; glumes subequal, lanceolate, acuminate; lower glume 1-nerved, glabrous, scaberulous along the nerve; upper glume 2/3 as long as spikelet, 3-nerved; rachilla internode 2 mm long, with hairs 3.0-3.5 mm long; lemma lanceolate, glabrous, linear in outline, lobes 6-8 mm long, slender and delicate; lowest lemma longer than 7 mm from the base to where lobes start; anther 1.3-2.5 mm long.
Perennial; up to 1.25 m high; tufted. Leaf blades 300-500 x 3-5 mm; flat. Flowers: panicle narrowly contracted; dense; spikelets 12-15 mm long; yellowish; glumes lanceolate; upper glume 2/3 spikelet length; rachilla internodes 2 mm long; with hairs 3.0-3.5 mm long; lemmas glabrous; linear in outline; lobes delicately awned; 6-8 mm long; sporadically.
Like H. turgidulum but spikelets 12-15 mm long, yellowish, lemma lobes above awn longer, 6-8 mm.
