Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; nodding at the tip; 800-1000 cm long; 40-50 mm diam.; woody; with root thorns from the nodes. Culm-internodes terete; thin-walled; 30-33 cm long; distally glabrous. Lateral branches dendroid. Buds or branches present on lower quarter of culm. Branch complement three, or several. Culm-sheaths deciduous; hispid; with appressed hairs; with tawny hairs; truncate at apex; auriculate; with subequal auricles; with 10 mm wide auricles; setose on shoulders; shoulders with 10 mm long hairs. Culm-sheath ligule 3 mm high; dentate and fimbriate. Culm-sheath blade narrowly ovate, or triangular; erect; glabrous on surface, or hispid. Leaves cauline. Ligule an eciliate membrane. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 8-10 cm long; 11-15 mm wide. Leaf-blade surface pubescent; densely hairy; hairy abaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.