Culms basally erect, apically drooping, ca. 10 m, 4–10 mm in diam., nearly solid, internodes terete, 8–20 cm, initially white powdery, becoming glabrous. Branches several, central dominant, to 5 m. Culm sheaths tardily deciduous, yellow-green, with purple spots, narrowly triangular, abaxially striate, appressed setose; auricles absent; ligule truncate, ciliate; blade erect or reflexed, lanceolate. Leaves 4–11 per ultimate branch. Leaf sheaths ca. 5 cm, ciliate; auricles developed; blade lanceolate, usually 5–12 × 0.7–1.7 cm, white powdery. Spikelet 1.2–1.7 cm; florets 3–5, apical one sterile. Glumes 2, membranous, 3–5-veined; lemma rigid, 8–9 mm, 7-veined; palea slightly longer than lemma, glabrous; lodicules 3, ovate, ca. 1 mm, margins ciliate. Anthers 8–9 mm. Ovary ovoid, glabrous; style 1; stigmas 2, plumose. Caryopsis unknown.
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