Description from Flora of China
Indocalamus confusus McClure, Lingnan Univ. Sci. Bull. 9: 20. 1940; Sinarundinaria confusa (McClure) P. C. Keng.
Rhizome neck 10–40 cm, (2–)4–7 mm in diam. Culms 1–2 m, 2–10 mm in diam.; internodes purple spotted, terete, 10–33 cm, initially white powdery, glabrous, nearly solid; supra-nodal ridges level; sheath scar prominent, initially yellow setose. Branches 1 or 2 at lower nodes and 3–5 at upper nodes. Culm sheaths persistent, narrowly triangular, leathery, brown setose, margins setose; auricles absent; oral setae readily deciduous; ligule truncate, ca. 1 mm, glabrous; blade reflexed, linear-lanceolate or linear, basally slightly hairy adaxially, margins serrulate. Leaves 2–5(–7) per ultimate branch; sheath margins white-gray ciliate; auricles absent; oral setae 2–5 mm; ligule truncate, ca. 1 mm, glabrous; blade lanceolate, 8–13 × 0.6–1.5(–2.1) cm, abaxially thinly hairy basally, secondary veins 4–6-paired, transverse veins distinct, base cuneate, one margin serrulate, other margin obscurely so. Inflorescence paniculate; spikelet 1.2–3.4 cm; florets 2–6, green-purple; rachilla 3–4 mm, hairy. Lemma lanceolate, margins ciliolate; palea keels ciliate, apex bifid. Anthers yellow. Ovary ovoid, glabrous. Caryopsis unknown. New shoots Apr–Aug.
* 1000–2300 m. N Guizhou, W Hubei, W Hunan, SW Shanxi, E Sichuan.