Slender, clumped bamboo, to 5 m tall; culms very numerous, closely aggregated, l-2 cm diam, erect when young, leaning in age, appressed-pubescent below internodes, pruinose when young (including sheath); the reduced leaves of the main axis tightly appressed to culms, brown, acuminate at apex, mostly 18-26 cm long (including sheath), appressed-pubescent outside above ligules; ligules ca 2 mm high, the margins irregular; branches clustered at the nodes, of various lengths, to 2 m long, these in turn branched, the branchlets to ca 1 m long. Leaves linear, acuminate, acute to rounded at base, mostly 3-18 cm long and 6-16 mm wide, pruinose and short-pubescent below, +/- glabrous above, the margins scabrid, the midrib weak, the sheaths turning brown in age, bristled on the upper margin. Inflorescences not seen. Croat 16563.