Culms 7–13 m, 3–8 cm in diam.; internodes green, 30–60 cm, glaucous below nodes, initially sparsely hairy, papillate; nodes very prominent; sheath ring corky, initially setose. Culm sheaths basally subtriangular, leathery, initially glaucous, setose, coarsely black glandular hairy, margins dark brown ciliate, apex narrow; auricles variable in size, scabrid; oral setae dark brown to yellow-green, rigid; ligule arched, very short, entire, ciliolate; blade erect, lanceolate, ca. 1/2 as wide as sheath apex, both surfaces glabrous or scabrid, margins coarsely hairy. Leaves 3–5 per ultimate branch; sheath glabrous or sparsely setose, margins ciliolate; auricles fragile, falcate at branchlet base, weak or absent apex; oral setae erect, light yellow; ligule very short, thin, glabrous, sometimes ciliate; blade lanceolate or oblong-lanceolate, 8–15 × 1.5–2.3 cm, secondary veins 4-paired, margins serrulate, sharply pointed. Inflorescence unknown. New shoots Apr–May.
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