Rhizome stout, 6-8 mm in diam., with dense, leathery, shiny sheaths. Pseudobulbs 1-1.5 cm apart on rhizome, often bright yellow when dried, ovoid or terete-ovoid, 5-6 × 1-3.5 cm, vernicose, with 2 leaves at apex and several sheaths at base; sheaths abaxially mottled with purplish brown, 4-7 cm, leathery. Leaf blade linear, grasslike, 30-40 × 0.8-1.2 cm, leathery, base slightly contracted, without distinct petiole, apex obtuse. Inflorescence proteranthous, compressed cylindric, relatively short, basal 2/3 embraced by sheaths; rachis 2-4-flowered; floral bracts caducous; pedicel and ovary ca. 15 mm. Flowers white, tinged with brown and with yellow spots on lip. Dorsal sepal oblong, ca. 23 × 7 mm, apex obtuse; lateral sepals slightly narrower, ca. 5 mm wide, abaxially slightly keeled. Petals similar to lateral sepals; lip ovate, ca. 20 × 15 mm, 3-lobed; lateral lobes erect, nearly subovate, apex obtuse; mid-lobe subovate, 7-8 × ca. 5 mm, apex acuminate; callus with 3 crisped-incised, longitudinal lamellae, extending from base of lip to ca. 1/3 way on mid-lobe, median lamella slightly shorter. Column slightly arching, ca. 12 mm, winged on both sides; wings widened toward column apex, ca. 1.5 mm wide on one side in upper part. Capsule suboblanceolate-oblong or narrowly obovoid-oblong, 3.2-3.8 × 0.7-1.1 cm; fruiting pedicel 9-12 mm. Fl. Sep-Nov. 2n = 40.
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