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Tufted or decumbent perennial, 350-2000 mm high; culm single or branched. Leaf blade to 500 x 10 mm, open or folded, rarely rolled, glabrous to sparsely hairy; sheath hairy, persistent, with purple to dark brown or black auricles. Inflorescence globose, lax, 70-220 mm long, with 16-90 spikelets. Spikelet 15-22 x 3-5 mm; glumes glabrous; lemma 2.2-3.3 mm long; lobes truncate, 0.4-0.7 mm long, almost free from lateral awns; lateral awns 4-6 mm long; central awn 15-20 mm long; palea 2.8-4.0 mm long; lodicules glabrous; anthers 3.0-6.5 mm long; ovary apex with tuft of white hairs; fruits 2.5 x 1.7-2.0 mm, globose, surface colliculately sculptured, pericarp brittle.
Robust, erect or decumbent, branched perennial, culms to 1.7 m. Leaves linear, flat or folded, cauline, sheaths pubescent, with purple auricles. Spikelets 2-flowered, in a lax, globose panicle 7-22 cm long, glumes 16-22 mm long.
