Spikelets 10–21 × 1.7–2 mm, narrowly oblong to linear, lightly laterally compressed, 8–36-flowered, the florets disarticulating from the apex downwards, the rhachilla fragile; glumes somewhat unequal, the inferior 0.7–1.5 mm long, reaching to about the middle of the adjacent lemma, lightly keeled, narrowly lanceolate to narrowly elliptic in profile, glabrous, subacute or obtuse at the apex, the superior 1–1.8 mm long, reaching to about 2/3 the way along the adjacent lemma, lightly keeled, oblong-lanceolate to oblong-elliptic in profile, glabrous, obtuse at the apex; lemmas 1.7–2.2 mm long, lightly keeled, ovate-elliptic in profile, subcoriaceous with obscure lateral nerves, ± appressed to the rhachilla, those in opposite rows somewhat imbricate and ± concealing the rhachilla, pallid or dark green, glabrous, obtuse at the apex; palea glabrous on the flanks, the keels slender, wingless, scaberulous; anthers 3, 1–1.4 mm long.
Densely tufted, robust perennial, up to 2 m high; leaves mainly basal. Leaf blade up to 1000 x 8 mm; ligule a fringe of hairs. Inflorescence a variable panicle; branches spreading to contracted with branches appressed to main axis. Spikelets 5-15(-25) x 1.5-2.0 mm, glossy, greenish grey to yellowish, laterally compressed; rachilla fragile, breaking up from apex downwards, upper portion sometimes breaking off as a whole; glumes shorter than spikelet, 1-nerved. Florets many; lowest lemma 1.4-2.0 mm long, broadly obtuse, entire, 3-nerved, lateral nerves obscure; palea obovate, usually protruding from lemma, keels broad, flat, scabrid; anthers 3, 1.2 mm long. Flowering time Dec.-May.
Robust perennial, densely tufted, up to 2 m high. Leaf blades up to 1000 mm long, up to 8 mm wide. Culms erect, 2-4 mm wide; leaves mainly basal. Spikelets 5-15(-25) mm long, 1.5-2.0 mm wide. Inflorescence variable, open with branches spreading or grading to contracted with branches appressed to main axis; spikelets glossy, greenish grey to yellowish, rhachilla fragile, breaking up from apex downwards, upper portion sometimes breaking off as a whole; lowest lemma 1.4-2.0 mm long, broadly obtuse, lateral nerves obscure; palea obovate, usually protruding from lemma, keels broad and flat, scabrid; anthers 3.1,2 mm long.
Perennial; up to 2 m high; robust; densely tufted. Culms erect; 2-4 mm wide. Leaf blades up to 1000 x 8 mm; leaves mainly basal. Flowers: panicle variable; open with branches spreading or grading to contracted with branches appressed to main axis; spikelets 5-15(-25) x 1.5-2.0 mm; glossy; greenish grey to yellowish; rachilla fragile; breaking up from apex downwards; upper portion sometimes breaking off as a whole; lowest lemma 1.4-2.0 mm long; broadly obtuse; lateral nerves obscure; palea obovate; usually protruding from lemma; keels wide and flat; scabrid; anthers 3; 1.2 mm long.
Densely caespitose perennial without rhizomes and usually without stolons; culms up to 140(200) cm tall, robust, erect, branched or unbranched, glabrous at the nodes, eglandular; basal leaf sheaths thinly pilose below or glabrous, firmly chartaceous, terete or lightly laterally compressed, eglandular, persistent; ligule a line of hairs; leaf laminas 7–40(100) cm × 3–5(8) mm, linear, involute, glabrous or thinly pilose, eglandular.
Panicle 13–45 cm long, narrowly oblong to broadly ovate, open, the spikelets subsessile or shortly pedicelled (0.5–1 mm) on the racemose primary branches or on secondary branchlets, the primary branches ascending or spreading, not in whorls, terminating in a fertile spikelet, glabrous in the axils, eglandular.
Caryopsis 0.7–0.8 mm long, elliptic.