Perennial. Rhizomes short; pachymorph. Culms arching; 600-1500 cm long; 15-50 mm diam.; woody. Culm-internodes terete; thin-walled; 19-32 cm long; distally glabrous. Lateral branches dendroid; intravaginal. Bud complement 40-50. Branch complement many; girdling the culm; thinner than stem. Culm-sheaths persistent; 6.8-12.6 cm long; 0.5 length of internode; hairy on margins. Culm-sheath ligule 1 mm high; ciliate. Culm-sheath blade triangular; indistinctly demarcated from sheath; erect; 2.8-4.2 cm long; with ciliate margins; mucronate. Leaves 4-9 per branch. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath oral hairs ciliate; 1-1.8 mm long. Ligule an eciliate membrane; 1-3(-7) mm long; glabrous on abaxial surface, or pubescent on abaxial surface. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2-0.3 cm long; petiole glabrous. Leaf-blades lanceolate; 10-17 cm long; 8-15 mm wide. Leaf-blade venation without cross veins, or with obscure cross veins. Leaf-blade surface glabrous. Leaf-blade apex attenuate.
Inflorescence a panicle; bracteate at branch bases. Peduncle 3-9.5 cm long; pubescent above. Panicle open; ovate; 7-12 cm long. Primary panicle branches spreading, or reflexed; 2.5-12 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 3-8 mm long; scabrous.