Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; nodding at the tip; 1000 cm long; 40-50 mm diam.; woody; without nodal roots, or with aerial roots from the nodes, or with root thorns from the nodes. Culm-internodes terete; thick-walled; 26-29 cm long; distally hispid. Lateral branches dendroid; erect. Branch complement several; with 1 branch dominant. Culm-sheaths deciduous; hispid; with appressed hairs; with tawny hairs; convex at apex; auriculate; with unequal auricles; with 5 mm wide auricles; setose on shoulders; shoulders with curved hairs. Culm-sheath ligule 3 mm high; ciliolate. Culm-sheath blade triangular; constricted at base; erect; scabrid. Leaves cauline. Ligule an eciliate membrane. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 7.5-16 cm long; 13-18 mm wide. Leaf-blade surface pubescent; densely hairy; hairy abaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.