Clump-forming pachymorph bamboo with rather open habit. Culms 10-12 m high, 8-11 cm diameter; dark green; nodes with single ring, branches several per node, one or two much larger and 1-2 m long, but the whole appearance being almost fastigiate. Culm sheaths green, striped purple, with dark brown hispid hairs; auricles absent; sheath lamina pale green striped purple. Leaves tending glaucescent beneath, much smaller from nodes high up on main clums.