A lithophytic herb of one to several growths. Leaves 4–7, narrowly oblong-elliptic, obtuse or rounded at apex, 15–17 cm long, 2.5–3.8 cm wide, green with pale longitudinal veins, ciliate on lower margins and at apex. Inflorescence many-flowered; peduncle 20–35 cm long, green, pubescent; rhachis with 4–5 cm long internodes; bracts elliptic, obtuse, 1.5–1.7 cm long, green, ciliate. Flowers small, opening successively, 6.7–7.8 cm across, primrose to daffodil yellow with greenish sepals; pedicel and ovary 4.7–5 cm long, green, finely pubescent. Dorsal sepal ovate, obtuse, 2.5–3.2 cm long, 2.6–3.5 cm wide, pubescent on back, ciliate. Synsepal ovate, truncate, 2.3–3.1cm long, 1.2–2 cm wide. Petals 15° to horizontal, spreading, linear-tapering, slightly obtuse, 3.1–4.2 cm long, 0.6–1.2 cm wide, ciliate, twisted in apical half. Lip bulbous towards apex, 3.2–3.9 cm long, 1.6–2 cm wide. Staminode oblongovate, truncate to shortly apiculate, 6–8 mm long, 5–7 mm wide, pubescent at base. 2n = 32.