Culms 7–12 m, 4–9 cm in diam.; internodes 22–35 cm, initially thickly white powdery, sparsely hispid; nodes flat. Branches many from mid-culm up, 3 dominant. Culm sheaths deciduous, leathery, initially brown spinous-hairy, glabrescent; auricles unequal, ciliate, larger one ca. 5 mm, smaller ca. 3 mm; ligule ca. 2 mm, ciliate; blade erect, triangular, glabrous, base ca. 1/2 as wide as sheath apex. Leaf sheaths initially hispid; ligule truncate, ca. 1 mm; auricles suborbicular; oral setae few; blade oblong-lanceolate, 13–25 × 2.5–5 cm. Pseudospikelets ca. 2.4 × 0.7 cm, subtended by a prophyll; florets 5–7; rachilla not disarticulating, internodes ca. 2 mm. Glumes 1 or 2; lemma ca. 1.6 × 1 cm; palea ca. 1.4 cm. Lodicules 3, ciliate. Anthers ca. 7 mm. Ovary ovoid, ca. 2 mm; styles ca. 5 mm; stigmas 3, 4–6 mm. Caryopsis unknown.
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