Perennial herb, 1.15-2.15 m high, tufted or long-rhizomatous. Leaves mostly crowded towards base of culm; sheaths with concave mouths, margins minutely ciliate; blades 5-12 mm wide, tapering smoothly towards apex (rarely unequally laterally praemorse), glabrescent or hispidulous. Culm nodose, glabrous. Inflorescence with lax, copious, terminal panicle ± 150 mm long and smaller lateral panicles 4-7 per node. Subtending bracts foliaceous. Male spikelets sessile to shortly pedicellate, ± 5 mm long, glumes reddish black proximally, castaneous distally, midrib hispidulous, margins setulose-ciliate. Female glumes similarly coloured, shortly awned, hispidulous, margins setulose-ciliate, upper surface distally with dense, upward-pointing hairs. Flowering time Apr. Nutlet broadly ovate, strongly beaked, 6 mm long, laterally compressed, shining, pale or pinkish brown. Hypogynium unlobed, brown.