Culms ca. 10 m, 5.5–7.5 cm in diam., apically recurved; basal internodes normally 20–36 cm, on abnormal culms very short, ca. 1 cm; wall ca. 1.5 cm thick; nodes level; branching to base. Branches several, central dominant. Culm sheaths deciduous, leathery, initially with dark brown, spiny hairs; auricles reflexed, linear, small; ligule 4–5 mm, serrulate; blade recurved or reflexed, ovate-lanceolate, base 1/2–4/5 as wide as sheath apex. Leaf sheaths subglabrous; ligule truncate, 1.5–2 mm; auricles tiny; oral setae developed; blade lanceolate, 9–22 × 2–4 cm. Pseudospikelets 1.7–1.8 cm; florets 6–8, apical 2 sterile. Rachilla internodes ca. 2 mm. Glumes 2 or 3, subcordate, ca. 5 mm, glabrous; lemma 7–8 mm, ciliate; palea 7–8 mm; lodicules 3. Anthers ca. 3.5 mm. Ovary ca. 3.5 mm; stigmas 1. Caryopsis unknown. New shoots Jun–Oct, fl. winter.
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