Perennial; caespitose. Rhizomes short; pachymorph. Culms scandent; 500-1000 cm long; 20-30 mm diam.; woody; without nodal roots, or with aerial roots from the nodes. Culm-internodes terete; solid; mid-green; concolorous; antrorsely scabrous. Lateral branches dendroid; extravaginal. Branch complement many; in a clump; with subequal branches and interspersed leafless fibrillar branches; thinner than stem. Culm-sheaths green and purple; distinctly mottled with last colour; antrorsely scabrous; without auricles. Culm-sheath ligule 0.3-0.5 mm high. Culm-sheath blade lanceolate. Leaves 2-3 per branch. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles erect; 3 mm long; obtuse. Ligule an eciliate membrane. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.3-0.4 cm long. Leaf-blades deciduous at the ligule; lanceolate; 11-15 cm long; 12-15 mm wide. Leaf-blade surface scaberulous; rough on both sides; glabrous, or pubescent; sparsely hairy; hairy abaxially. Leaf-blade margins cartilaginous; scabrous.
Inflorescence a panicle. Panicle open; linear; 10-24 cm long; 1 cm wide. Primary panicle branches appressed; 1-8 cm long; bearing spikelets almost to the base. Panicle branches angular; scabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 3-8 mm long.