Description from Flora of China
Culms to 6 m, 3–5 cm in diam.; internodes initially dark green or purple-green, yellow-brown in age, 30–40(–60) cm, glaucous, setose, scabrid. Culm sheaths yellow-brown, sparsely setose; auricles and oral setae absent; ligule arcuate or weakly prominent, shortly ciliate; blade reflexed or erect, triangular-ovate. Leaves 5–9 per ultimate branch; sheath glabrous; auricles absent; oral setae 2 or 3, deciduous; blade oblong to lanceolate, 14–27 × 2.5–4.5 cm, glabrous, secondary veins 6–8-paired. Pseudospikelets robust, slightly compressed, 4.5–13 × 0.5–0.8 cm; bracts 4–7, distal bracts larger; florets 5–15. Rachilla internodes ca. 1 cm, articulate, glaucous, glabrous. Lemma broadly ovate; palea about as long as lemma or slightly shorter, narrower, keels shortly ciliate; lodicules glabrous. Stigmas 3, purple. Fl. Oct–Dec.
The shoots are bitter, and the culms are used for fencing and weaving.
* Streams; 900–1600 m. SE Yunnan.