Bambusa calostachya Kurz, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 42: 247. 1873; Sinocalamus calostachyus (Kurz) P. C. Keng.

Culms tall. Culm sheaths leathery, apex truncate; ligule 1–2 mm, rounded or serrulate; auricles absent; blade erect. Leaf sheaths glabrous, margins long ciliate, apex truncate; ligule 1–2 mm, rounded or serrulate; blade variable, broadly lanceolate, 23–30 × 2.5–6.5 cm, apex acute. Pseudospikelets 1–5. Spikelets 1–1.5 cm; florets 4–6. Glumes 2 or 3, broadly ovate, margins ciliate, apex mucronate; lemma 9–11 × 6–9 mm; palea 6–7 mm, 3–5-veined between and 1-veined on either side of keels, apex acuminate. Filaments slender; anthers yellow, ca. 5.5 mm; Pistil ca. 1.1 cm; ovary ovoid or orbicular; style 1; stigma 1. Fruit unknown.

Yunnan [Myanmar; cultivated in India].