Culms ca. 8 m, to 3.8 cm in diam., basally slightly flexuose, apically drooping; internodes ca. 30 cm, initially white powdery, glabrous; several basal nodes with rings of gray-white silky hairs below sheath scars, branching from 3rd node up. Branches many at mid-culm, central 3 dominant, swollen at base, branchlets of lower branches sometimes shortened into weak thorns. Culm sheaths deciduous, glabrous, apex obliquely truncate; auricles unequal, larger auricle to 2 × size of smaller one, narrowly oblong, ca. 5 mm; oral setae fine, ca. 5 mm; ligule ca. 3 mm, irregularly dentate, very shortly ciliolate or subglabrous; blade erect, narrowly triangular, base nearly 6/7 width of sheath apex. Leaf blade linear-lanceolate to lanceolate, usually 9.5–13 ×1.1–1.6 cm, abaxially pubescent, adaxially glabrous. Inflorescence unknown.
Home