Plants 1--3 m tall. Ligule 2-cleft, ca. 6 mm, papery, lobes rounded at apex; petiole 5--10 mm; leaf blade lanceolate or linear-lanceolate, 30--45 × 4--11 cm, glabrous, base cuneate, apex caudate. Spikes narrowly ellipsoid, 4--5 cm; peduncle 30--35 cm in fruit; bracts oblong, 2--2.7 cm × 6--8 mm; bracteoles tubular, 1.1--1.3 cm, pubescent, apex 2-cleft. Calyx ca. 1.4 cm, base white villous, apex 2- or 3-lobed. Corolla tube equaling calyx, base white pilose; lobes oblong-lanceolate, 1--1.3 cm. Labellum subrhombic, ca. 1 cm × 6--8 mm, apex 2-cleft; claw white pubescent. Anther linear-oblong, ca. 3 cm; connective appendage semiorbicular. Ovary densely brownish pubescent. Capsule ovoid, rarely oblong-ellipsoid, 2--2.5 × 1--1.5 cm, longitudinally striate when dry. Fl. May--Jul, fr. Sep--Nov.

Forests; 200--1500 m. Guangxi, Yunnan [India, Thailand].