Rhizomes yellow inside, tuberous. Pseudostems ca. 1.8 m. Leaf sheath subglabrous; ligule 2-lobed, 1--2 mm, papery, margin ciliate; petiole ca. 2 mm, pubescent; leaf blade oblong-oblanceolate, 6--40 × 1.5--5 cm, adaxially glabrous, abaxially pubescent along midvein and at margin, base attenuate, apex acuminate. Inflorescences arising from rhizomes, ellipsoid, rarely subconical, 10--20 × 3--4 cm, many flowered; peduncle erect, 19--32 cm; bracts imbricate, purple with green margin, obovate to broadly ovate, 2.5--3.5 cm, pubescent, apex obtuse; bracteoles pale purple with white margin, broadly elliptic, ca. 2.8 × 2 cm, apex 2-cleft. Calyx ca. 1.7 cm, split on 1 side, apex 3-toothed, ciliate. Corolla tube white, ca. 3.5 cm; lobes yellowish, central one ca. 2.3 × 1.3 cm, lateral ones lanceolate, ca. 1.7 cm × 7 mm. Labellum yellowish; central lobe suborbicular or broadly ovate, 1.6--2 × 2--2.5 cm, inconspicuously sparsely punctate, margin erose, apex 2-cleft; lateral lobes broadly ovate, ca. 5 × 7 mm, apex entire or 1-toothed. Anther subsessile, ca. 1.2 cm; connective appendage ca. 1 cm. Ovary densely appressed pubescent. Fl. Jul--Aug.

* S and W Guangxi.