Plants 50--100 cm tall. Leaf sheath pubescent distally; ligule orbicular, ca. 2 cm, pubescent; petiole absent or rarely to 1.5 cm; leaf blade obovate or elliptic, 20--50 × 7--15 cm, glabrous, base acute, apex acuminate. Spikes ellipsoid; peduncle short or absent; bracts submembranous, 2--3 cm. Flowers ca. 9 cm. Corolla tube ca. 5.5 cm; lobes linear, ca. 2.5 cm × 4 mm, punctate. Lateral staminodes linear, 4--6 mm. Labellum white, yellowish at middle, purple at base, obovate, ca. 3.5 cm. Anther linear, 1.2--1.5 cm; connective appendage 3-lobed, lobes 3--4 × ca. 1 mm, central one erect, lateral ones falcate, expanded. Ovary oblong-ellipsoid, 3--4 mm, densely appressed pubescent. Capsule subglobose, ca. 2 cm in diam., brown pubescent, 1.5--2 cm. Fl. Apr--May.
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