Plants lithophytic or terrestrial. Leaves 4-6, distichous; blade abaxially purple or densely marked with purple speckles, adaxially tessellated with dark and whitish or light green, oblong or oblong-elliptic, 7-21 × 3.5-5.5(-7.5) cm, leathery, rounded and minutely bilobulate at apex. Scape suberect or arching, terminating in 1 or 2(or 3) flowers; peduncle green, heavily spotted purple, 5-7(-8) cm, densely white pubescent; floral bract green, ovate, conduplicate, 1-3(-4) × 1-2 cm, abaxially with purple speckles and along midvein hairy, ciliate; pedicel and ovary 3-4.5 cm, densely white pubescent. Flowers slightly scented, 5-7 cm in diam., usually yellowish to ivory-white ± finely spotted with purple or brown-purple throughout. Dorsal sepal broadly ovate, 2.5-4.2 × 2.4-4.4 cm, abaxially slightly puberulent on midvein, ciliate, apex obtuse to retuse; synsepal similar to dorsal sepal, slightly smaller. Petals obliquely elliptic to rhombic-elliptic, 3-5 × 1.8-3.1 cm, both surfaces very minutely puberulent, ciliate, rounded at apex; lip ellipsoid to ovoid, 3.5-4.5 cm; pouch 2.2-3 × 1.4-1.7 cm, outside very minutely puberulent, apical margin incurved. Staminode ovate to ovate-triangular, 10-12 × 8-11 mm, basal margin sometimes minutely ciliate. Fl. May-Aug. 2n = 26.