Perennial; up to 2.4 m high; often robust; rhizomatous; tufted. Leaf blades up to 90 x 16 mm; expanded; sometimes folded or narrowed to midrib near base. Flowers: panicle contracted; 200-450 mm long; spikelets 3-6 mm long; callus hairs 1/4-1/3 length of spikelet; upper lemma not awned or awn up to 7 mm long.
A grass. A herb. It is an erect grass and can keep growing from year to year. It is a very robust plant. It grows 3 m high. The flowering shoots are 40 cm long. They are brownish. The spikelets have stalks.
Robust perennial to 2.4 m. Leaves linear-lanceolate. Spikelets in a large silky panicle, reddish, 4-6 mm wide, awned.