A bamboo. It is densely tufted. In moist areas it keeps its leaves and in dry areas it loses them. It grows about 8-16 m high. The stems are 4-10 cm across. They are often curved. The nodes are swollen. The lower nodes often root. The internodes are 30-45 cm long. The stem sheath is hairless. The leaves are narrowly sword shaped. It is 25 cm long by 3 cm wide. They have fine hairs on both surfaces. The flowers are brown in round heads. The fruit is a grain.