A lithophytic herb often forming clumps of up to 15 growths; roots elongate, redpubescent. Stems short, 4- to 6-leaved, often upcurving. Leaves coriaceous, 4–6, ligulate, obliquely obtuse at the apex, 20–50 cm long, 2–5 cm wide, dark green above, paler beneath. Inflorescence horizontally spreading to suberect, 2- to 5-flowered; peduncle terete, green, papillose below, glabrous above; bracts cucullate, elliptic, truncate, 1.2–3 cm long, green. Flowers very slightly papillose on outside of sepals; dorsal sepal white with a green base and venation; synsepal pale green or white with darker green veins; petals pale greenish yellow with darker veins in lower half, flushed with purplish brown above; lip yellow flushed with purple and brown; staminode off white with dark green venation; pedicel and ovary glabrous, green. Dorsal sepal obovate, shortly apiculate, 3.8–4.3 cm long, 2.2–2.5 cm wide, with reflexed basal margins, papillate at base on inner surface. Synsepal ovate, obtuse, 3.5–3.8 cm long, 2.3–2.6 cm wide, with reflexed basal margins and inflexed apical ones. Petals falcate-pendent, linear-tapering, rounded at apex, 8–9 cm long, 1–1.1 cm wide, basal part incurved over base of column, with a few raised warts on inner side towards the base and a few hairs on the margin but not ciliate, papillose on inner surface at base and at apex. Lip deeply saccate, pointed at apex, 4–4.5 cm long, 2–2.5 cm wide, with inflexed triangular side lobes. Column 1–1.2 cm long, with a pubescent stalk and blunt pubescent filaments; staminode obcordate, with a blunt basal umbo, bilobed at apex, 9–11 mm long, 6–7.5 mm wide, scarcely papillate on side margins.