Description from Flora of China
Plants to 1 m tall. Stem erect, stout, with many membranous sheaths to 4 cm. Inflorescence with many well-spaced flowers; rachis to 50 cm; floral bracts reflexed, narrowly lanceolate, 4-4.8 × 0.5-0.6 cm, shorter than pedicel and ovary, apex acuminate. Flowers creamy white and purple-brown, ca. 4 cm in diam.; pedicel and ovary 4.5-5 cm, glabrous. Dorsal sepal linear-lanceolate or lanceolate, slightly concave, 30-35 × ca. 8 mm, abaxially sparsely puberulent, apex long cuspidate; lateral sepals similar to dorsal sepal, not concave, 6-7 mm wide. Petals lanceolate, ca. 20 × 6-7 mm, thinly textured, slightly hairy along abaxial midrib, apex acuminate; lip 14-17 mm, fleshy, contracted below middle into epichile and hypochile; hypochile concave, small, 2-3 mm, with 2 ligulate wings ca. 4 mm; epichile ovate, ca. 1.2 cm × 5 mm, adaxially densely papillose, 3-lobed; lateral lobes incurved, suborbicular; mid-lobe with acuminate apex. Column slightly arcuate, 1.1-1.4 cm, winged toward apex. Fl. Jul-Aug. 2n = 36.
Forests; ca. 1200 m. S Yunnan [Thailand, Vietnam].