Culms scrambling, 6–20 m, 5–25 mm in diam.; nodes level; internodes 20–50 cm, solid or nearly so on smaller culms, glabrous. Dominant branches equal in size to culm. Culm sheaths retrorsely brown scabrous, distally purple-brown spotted, lower portion very tough, upper papery and thin, margins glabrous; ligule inconspicuous, auricles and oral setae absent; blade persistent, erect, acicular, short, to ca. 1 cm. Leaf sheaths 2–4 cm, glabrous or slightly pubescent; ligule 1–1.5 mm; auricles and oral setae absent; blade lanceolate, 4–12 × 0.5–2 cm, apex softly acicular. Spikelets 3–6-flowered, 2–3.5 cm; prophylls to 0.5 cm. Lemma 5–7 mm; palea equal to lemma, obtuse; lodicules 1.5–2 mm. Anthers purple, 3–4 mm. Ovary oblong, upper portion pubescent; style short; stigma plumose. Caryopsis falcate, 4–5 mm, glabrous. Fl. Apr–Jun.
Mountain forests, river banks, rocks; at elevations of 1,200-2,600 metres in southern China.
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