Culms 4–5 m, 2–2.5 cm in diam., basally nearly straight, apically slightly drooping; internodes 25–30 cm, initially thinly white powdery, several lower internodes striped yellow-green; wall thick; nodes slightly prominent; basal ca. 3 nodes with rings of gray-white silky hairs below and above sheath scars; usually branching from 3rd or 4th node up. Branches many, clustered, nearly horizontal, central dominant. Culm sheaths deciduous, initially yellow-green striped, glabrous or with stiff, brown hairs near inner margin and base, apex subtruncate; auricles unequal, larger auricle nearly 2.5 × as large as smaller one, broadly elliptic or elliptic, ca. 2 × 1.3 cm, wrinkled; oral setae undulate; ligule 1.5–2 mm, margin ciliate; blade deciduous, erect, triangular to narrowly triangular, base slightly rounded extending outward to join auricles for 6–7 mm, nearly 3/5 as wide as sheath apex. Leaf blade linear-lanceolate, 8–15 × 0.9–1.3 cm, abaxially densely pubescent, adaxially glabrous. Inflorescence unknown.
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