Rhizome creeping, ca. 5 mm in diam., rooting from base of pseudobulbs. Pseudobulbs ca. 6 cm apart from each other, ovoid, 2-3 cm, ca. 1.3 cm in diam., ribbed, with a terminal leaf. Petiole conduplicate, 1-2 cm; leaf blade narrowly oblong, 11-16 × 2.2-2.5 cm, thickly leathery, apex obtuse and slightly emarginate. Scape from base of pseudobulb, erect, 8-11 cm; umbel 2-flowered; peduncle ca. 2 mm in diam., with 2 tubular sheaths 1.5-2 cm; floral bracts narrowly ovate, 1-1.5 cm. Pedicel and ovary ca. 3 cm. Flowers large, deep yellow with reddish brown veins. Dorsal sepal ovate, ca. 18 × 8 mm, apex shortly mucronate; lateral sepals oblong, ca. 43 × 8 mm, slightly connate to each other on their basal edges and adnate to column foot, twisted near base. Petals subovate-triangular, ca. 10 × 6 mm, entire, truncate and mucronate, 5-8-veined; lip ovate-lanceolate and abruptly contracted above middle, ca. 1.3 cm, attached to end of column foot by a mobile joint, basal margin incurved and ciliate, adaxially with 1 keel centrally, surface densely finely papillate, apex subacute. Column ca. 3 mm, with triangular, rounded wings near base; stelidia triangular, ca. 2 mm, acute; anther cap subglobose, densely finely papillate. Fl. Apr.
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