Culms 3–7(–15) m, 2–5 cm in diam.; internodes 30–60 cm or longer, densely white powdery; wall 2–4 mm thick; nodes flat; sheath scars corky; branching absent from lower nodes. Branches many, subequal. Culm sheaths late deciduous, thickly papery, much shorter than internodes; densely glaucous, hispidulous, apex slightly concave; auricles narrowly oblong, oral setae long, slender; ligule ca. 2 mm, slightly convex, fimbriate; blade strongly reflexed, base 1/4–1/3 as wide as sheath apex, adaxially glabrous. Leaf sheaths glabrous; ligule ca. 1 mm; auricles conspicuous, occasionally absent; oral setae straight; blade narrowly lanceolate, 16–20 × 1.5–3 cm. Glumes 1 or 2; lemma ca. 1 cm; palea about as long as lemma, apex obtuse or truncate. Style 1–2 mm; stigmas 3. Caryopsis triangular.
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