Stems 4-13 cm, 0.4-1 cm in diam. Leaf blade 15-30 × 1-3 cm, leathery, apex unequally 2-lobed. Inflorescences 1 or 2, 11-17 cm, sparsely 4-8-flowered; peduncle 3-6 cm; rachis not distinctly zigzag, 5-8 cm; floral bracts ovate, 3-5 × 2-3 mm, apex acute. Flowers thickly textured, widely opening, 3-4 cm in diam., fragrant; pedicel and ovary white, 2-4.5 cm; sepals and petals abaxially white, adaxially yellowish brown with yellow stripes, tessellated. Sepals subsimilar, lateral sepals slightly wider than dorsal sepal, oblong-obovate, 16-20 × 6-12 mm, base contracted into a short claw, margin slightly crisped, apex obtuse. Petals subspatulate, 15-19 × 8-10 mm, base clawed, margin slightly crisped, apex rounded; lip ca. as long as or longer than sepals, fleshy, spurred; lateral lobes erect, inner surface white with many purple spots, subfalcate, triangular or lanceolate, 4-5 × 2-3.5 mm, apex obtuse; mid-lobe yellowish brown in apical half, yellow in basal half, pandurate, 12-16 × 5-7 mm, without obvious calli, apex 2-lobed; disk surface with 5 or 6 yellow papillate ridges, base often shortly hairy; spur white, cylindric, 7-8 × 1.3-2 mm, apex subacute. Column white, 6-7 mm; anther cap yellow, 2-3 mm wide; pollinia ca. 1 mm in diam. Fl. Apr-May. 2n = 38, 76.
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