Description from Flora of China
Sinocalamus giganteus (Munro) A. Camus, Rev. Int. Bot. Appl. Agric. Trop. 29: 551. 1949.
Culms 20–30 m, 20–30 cm in diam.; internodes 30–45 cm; wall 1–3 cm thick. Branches several. Culm sheaths deciduous, initially purple, thickly leathery, brown hairy; margins broadly rounded; auricles reflexed, wavy; oral setae absent; ligule 6–12 mm, serrulate; blade reflexed, ovate-lanceolate, 13–38 cm. Leaf sheaths glabrous; ligule 1–3 mm, serrulate; blade usually oblong-lanceolate, to 45 × 10 cm. Inflorescence branches pendulous, long. Pseudospikelets 4–12(–25) cm. Spikelets 10–15 × 3–4 mm; florets 5–8, apical one sterile. Glumes 2, 3–4 mm; lemma broadly ovate, margins ciliate, apex mucronate; palea about as long as lemma, 2-keeled, keels ciliate, 2-veined between and 1-veined on either side of keels. Anthers ca. 6.5 mm, apex apiculate. Pistil ca. 1 cm, shortly hairy. Ovary ovoid; style long; stigma 1, purple. Caryopsis oblong, apex obtuse, plumose.
Yunnan; cultivated in Taiwan [Myanmar; cultivated in Malaysia and Thailand].