Perennial. Culms scandent; pendulous at the tip; 500-1000 cm long; 10-17.5 mm diam.; woody. Culm-internodes terete; 27-40 cm long; retrorsely scabrous. Culm-nodes without obvious supra-nodal ridge; pubescent. Lateral branches dendroid; infravaginal. Bud complement 5-8. Branch complement several; in a clump; with 1 branch dominant; thinner than stem. Culm-sheaths persistent; 14-26 cm long; retrorsely scabrous; hairy on margins. Culm-sheath ligule 0.5 mm high. Culm-sheath blade lanceolate; erect; 3-8.5 cm long; scabrid. Leaves 4-8 per branch. Leaf-sheaths glabrous on surface; outer margin glabrous. Ligule an eciliate membrane; 2-4.5 mm long; glabrous on abaxial surface; obtuse. Collar with external ligule. Leaf-blade base asymmetrical; with a brief petiole-like connection to sheath; petiole 0.2-0.8 cm long; petiole glabrous. Leaf-blades oblong; 9-28 cm long; 24-58 mm wide. Leaf-blade midrib evident. Leaf-blade venation with obscure cross veins. Leaf-blade surface glabrous. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
Inflorescence a panicle; bracteate at branch bases; subtended by an unspecialized leaf-sheath, or an inflated leaf-sheath; embraced at base by subtending leaf. Panicle capitate; globose; dense; 2-3 cm long. Panicle axis angular, or flat; glabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2-4 mm long; glabrous.