Culms ca. 1.5 m, 5–6 mm in diam.; internodes 10–17 cm, initially white powdery below nodes, glabrous; wall thin, cavity with lamellate pith; nodal ridge strongly elevated. Culm sheaths straw-colored, ca. 1/3 as long as internodes, rigid and brittle at maturity, lower and middle portions with sparse deciduous strigae or imprints left by appressed hairs, base thickened with an elevated corky ring, margins ciliolate, otherwise glabrous; auricles and oral setae not developed; ligule truncate, short; blade deciduous. Leaves 5 or 6 per ultimate branch; sheath initially thinly white powdery, glabrous, margins ciliolate; auricles falcate, large, fimbriate with brown setae ca. 1 cm; ligule truncate, ca. 1 cm; blade broadly lanceolate or lanceolate, glabrous, secondary veins 9 or 10 pairs, transverse veins distinct, margins spinescent. Inflorescence unknown.
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