Plants terrestrial or lithophytic, with 1 to several creeping stolons more than 10 cm × 1.5-2.5 mm. Leaves 5-7, distichous; blade abaxially densely purple spotted and carinate, adaxially tessellated with dark and light green, oblong or linear-oblong, 6-12 × 1.8-2.3 cm, thickly leathery, margin serrulate, apex acute or sometimes tridenticulate. Scape erect, terminating in 1 or rarely 2 flowers; peduncle yellowish green, densely marked with purple, 13-28 cm, with white short hairs; floral bract yellowish green, marked with purple, ovate, conduplicate, 1.4-1.8 cm, abaxially puberulent toward base; pedicel and ovary (2-)3-4.5 cm, shortly hairy. Flower (3-)7-9 cm in diam., pale yellow to golden yellow, sometimes slightly flushed with pale green, with pale maroon veins on staminode, usually with many rows of maroon speckles on inner bottom of lip. Dorsal sepal ovate, 1.8-4.8 × (0.8-)1.4-2.2 cm, adaxially pubescent toward base, minutely ciliate, acute at apex; synsepal similar to dorsal sepal, slightly smaller, obtusely bicarinate abaxially. Petals broadly ovate-elliptic to suborbicular, (1.5-)2.8-5.3 × 0.9-4.8 cm, adaxially white villous toward base, ciliate, slightly undulate at margin, rounded at apex; lip subglobose or somewhat flattened globose, (1-)4-6 × (0.5-)3.5-4 cm, apical margin involute. Staminode broadly ovate or ovate-orbicular, (5-)12-20 × (5-)12-20 mm, margin recurved, apex acute. Fl. Feb-Apr.
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