Culms flexuose, 3–10 m long, 0.5–1.1 cm in diam., apically clambering; internodes to 60 cm, smooth and glabrous near base, otherwise white powdery and white strigose; wall ca. 1 mm thick. Branches ca. 40 cm. Culm sheaths deciduous, abaxially slightly hairy or glabrous, base of outer margin usually with a conspicuous subcircular expansion below point of attachment, apex truncate with equal sides; auricles usually inconspicuous; oral setae many, straight, 5–7 mm; ligule less than 1 mm, glabrous, margin undulate; blade reflexed, those on lower nodes of culm less than 1/2 length of sheath, those on upper nodes of culm longer. Leaves 5–7 per ultimate branch; sheaths 2–3.5 cm, glabrous; auricles usually inconspicuous; oral setae several, 3–5 mm; ligule less than 1 mm; blade lanceolate, 5–18 × 1.2–7 cm. Pseudospikelets fusiform, 1–2.2 cm; prophylls small; bracts 4–6, navicular, 1–5.5 mm, papery, rigid, keeled, apex obtuse; rachilla disarticulating. Glumes absent; lemma oblong-lanceolate, 1.2–1.4 cm, involute, many veined, apex acute, mucronate; palea oblong-lanceolate, to 1.5 cm, markedly involute, thinly papery, apex truncate or emarginate; lodicules absent. Filaments white, ca. 2 cm, base ± connate; anthers yellow, 5–6 mm. Ovary ovoid, glabrous, stalked; style purple; stigmas 3, purple-red, 3–5 mm, plumose. Caryopsis fusiform, 10–13 × ca. 1.5 mm, glabrous, apex beaked.
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