Melocalamus arrectus T.P.Yi

Culms 10–15 m, 2–4 cm in diam.; internodes 20–40(–60) cm, initially pubescent; wall rather thick; nodes prominent, each with a ring of white powder and tomentum below. Branching from 2nd to 3rd nodes upward, 1–3 dominant, to 8 m. Culm sheaths pale brown, ca. 1/3 as long as internodes, leathery, appressed pubescent, apex truncate; auricles minute; oral setae few, deciduous; ligule ca. 1 mm, ciliate; blade erect, triangular or ovate-triangular. Leaf sheaths glabrous; ligule ca. 1 mm; auricles absent; oral setae absent to 2, minute; blade lanceolate, 12–22 × 2.2–4 cm. Flowering branches leafy or leafless; internodes densely pubescent. Pseudospikelets minute. Glumes 2, 1.5–2 mm; rachilla internodes ca. 0.5 mm; lemma ca. 2 mm; palea membranous. Lodicules linear-lanceolate, 1–1.5 mm. Anthers ca. 1 mm. Ovary ovoid, glabrous. Caryopsis globose, ca. 2 cm.

It is a tropical plant.