Terrestrial or lithophytic herbs. Pseudobulbs ovoid, more or less laterally compressed, 1.5 cm long. Leaves solitary, with a sheath-like petiole attached to pseudobulb, cordate, 5-15 cm long, 4-10 cm wide, apex acute, yellowish green, sometimes with many white spots on upper surface; sheath tubular, 3-6 cm long. Peduncle erect, ca. 10 cm long; bracts minute, triangular, 1-3 mm long; pedicel and ovary 10-14 mm long. Flowers ca. 10, green, widely spreading; dorsal sepal linear, 8-11 mm long, 2 mm wide, obtuse, revolute; lateral sepals similar to dorsal one but shorter and slightly oblique; petals linear, 10 mm long, 1 mm wide, lip obovate-obtriangular, 8 mm long, 7 mm wide, apex rounded, cuspidate, glabrous, slightly denticulate, with 2 small calli on basal disc; column curved downward, 4-5 mm long, winged near apex, dilated, with 2 round calli at base; anther cordate; pollinia deltoid. Capsules ellipsoid, 1 cm long.

TAIPEI: Pinglin, Su & Wang 6753; Tapaokoshan, Su & Chen 7429. ILAN: Nanao, Su 7914, 8129. TAICHUNG: Pashienshan, Su & Chen 8164. NANTOU: Chitou, Su 86. Chingshuikou, Huang et al. s. n. Feb 1959. PINGTUNG: Linungshan, Su 8570. HUALIEN: Hopin, Su 751.

India, the Himalaya and southwestern China. Taiwan, in broadleaved forests below 1500 m throughout.