Perennial. Culms arching; 200-1000 cm long; 20-40 mm diam.; woody; without nodal roots. Culm-internodes terete; solid; 13.5-17 cm long; smooth, or scaberulous. Culm-nodes swollen. Lateral branches dendroid; infravaginal. Bud complement 24-65. Branch complement many; in a clump; with subequal branches; thinner than stem. Culm-sheaths deciduous but leaving a persistent girdle; 12-35 cm long; 2-5 times as long as wide; antrorsely scabrous; glabrous, or pilose; hairy above; hairy on margins. Culm-sheath ligule 2-4 mm high. Culm-sheath blade triangular; demarcated but persistent; erect; 5-12 cm long; pubescent and scabrid. Leaves 2-5 per branch. Leaf-sheaths keeled; glabrous on surface; outer margin hairy. Ligule an eciliate membrane; 0.5-4 mm long; pubescent on abaxial surface; truncate, or obtuse. Collar with external ligule; ciliate. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.1-0.15 cm long. Leaf-blades linear; 8.5-31.2 cm long; 4-9 mm wide. Leaf-blade venation without cross veins. Leaf-blade surface glabrous, or pilose; hairy abaxially. Leaf-blade margins cartilaginous; scabrous.
Inflorescence a panicle. Panicle open; ovate; 6-17 cm long; contracted about primary branches. Primary panicle branches spreading, or reflexed; 4-5 cm long. Panicle axis scabrous. Panicle branches angular; scabrous; pubescent in axils; with prominent pulvini. Spikelets solitary. Fertile spikelets pedicelled. Pedicels angular; 3-10 mm long; pubescent.