Stems 7-30 cm, 0.5-1.3 cm in diam. Leaf blade 12-27 × 1-2 cm, thickly leathery, apex unequally 2-lobed. 

Inflorescences 1 or 2, 20-30 cm, 5-15-flowered; peduncle 10-21 cm; rachis not distinctly zigzag, 6-12 cm; floral bracts ovate-triangular, 1-2 × 1-2 mm, apex acute. Flowers thickly textured, widely opening, 2.5-3 cm in diam., fragrant; pedicel and ovary white, occasionally tinged pink, 2-5 cm; sepals and petals yellowish or greenish with brown spots and irregularly longitudinal stripes, not distinctly tessellated. Dorsal sepal obovate to oblanceolate-spatulate, 16-20 × 7-10 mm, base clawed, apex obtuse to acute or sometimes retuse; lateral sepals falcate-obovate, ca. 20 × 13 mm, base clawed, margin slightly undulate, apex rounded. Petals spatulate, 16-20 × 6-8 mm, base clawed, apex obtuse; lip white or yellowish white, shorter than sepals, spurred; lateral lobes erect, inner surface white spotted with purple, suborbicular, 2-4 × 1-2 mm, apex rounded-truncate; mid-lobe yellowish white, with pink stripes, pandurate-ovate, 6-8 × 3-6 mm, sometimes with small indistinct pair of calli near spur, apex obtuse, rounded, or slightly retuse; disk with 3 ridges, 2 lateral keels dilated at narrowest part of mid-lobe; spur conic, 4-5 × 1-1.5 mm, apex subacute. Column 3-4 mm; anther cap yellow-white, 1.5-2 mm wide. Fl. Apr. 2n = 38.