Stems strongly clavate, swollen, ± pseudobulbous at base, 25-40 cm, to 2 cm in diam., internodes clavate, expanding to a swollen node, obscurely 4-angled, sometimes ridges inconspicuous, yellow, pale brown and glossy when dry, sheathless. Leaves 3 or 4, subterminal, oblong-lanceolate, 8-17 × 2.6-6 cm, leathery, base not decurrent into clasping sheath, apex acute. Inflorescence subterminal, pendulous, densely many flowered; peduncle with 2-4 sheaths at base; rachis 6-16 cm; floral bracts broadly oblong or obovate, 12-15 × 6-10(or more) mm, membranous, strongly ca. 10-veined, revolute, obtuse. Pedicel and ovary whitish green, 2-2.5 cm. Flowers spreading, 3-4 cm in diam.; sepals and petals pale yellow, lip golden yellow, column and anther cap orange-yellow. Dorsal sepal ovate, 17-21 × 8-12(or more) mm, 5-veined, obtuse; lateral sepals nearly as large as dorsal sepal, ovate-lanceolate, 5-or 6-veined, apex subacute; mentum subglobose, ca. 5 mm wide. Petals suborbicular, 15-20 × 11-15 mm, with 3 main veins and many secondary veins, base contracted into a short claw, margin erose above middle; lip orbicular-rhombic, 17-22 × up to 22 mm, both surfaces densely lanate above middle, shortly clawed, both sides embracing column below middle, apex rounded. Column ca. 4 mm; anther cap compressed subglobose or conic, front margin truncate, finely notched.
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