Rhizome creeping, stout, ca. 4 mm in diam., rooting from base of pseudobulbs. Pseudobulbs 10-11 cm apart from each other, narrowly ovoid, 3-4 cm, ca. 1 cm in diam., with a terminal leaf. Petiole ca. 1 cm, ± conduplicate; leaf blade oblong, 10-18 × 2-2.4 cm, fleshy, apex obtuse. Scape from base of pseudobulb, 3-4 cm; umbel more than 20-flowered; peduncle with 4 or 5 sheaths ca. 1 cm; floral bracts oblong-ovate, ca. 1 cm, apex subacute. Pedicel and ovary 1.5-2 cm. Flowers purplish red. Dorsal sepal subobovate, ca. 8 × 4 mm, apex subtruncate and slightly mucronate; lateral sepals ca. 18 mm, twisted near base, their upper and lower edges connate to varying degrees forming a slipper-shaped synsepal; synsepal ca. 11 mm wide, outer surface finely papillate, apex rounded. Petals narrowly oblong-lanceolate, ca. 5 × 1.3 mm, entire, obtuse; lip recurved at a right angle, lanceolate, glabrous, ± conduplicate in basal half, apex obtuse. Column ca. 2 mm; foot ca. 3 mm, with free part ca. 1 mm; stelidia deltoid, ca. 1 mm; anther cap ± subspherical. Fl. Oct.
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