Rhizomes long creeping, ca. 1.5 mm in diam., terete, more or less woody. Pseudobulbs 1-4 cm apart, ovoid, 1-1.5 cm long, 5-10 mm in diam., sometimes slightly oblique, greenish yellow, glabrous, lustrous. Leaves solitary, elongate oblong or linear, 3-10 cm long, 7-12 mm wide, fleshy, coriaceous, apex obtuse or retuse, base cuneate, nearly sessile. Inflorescence ca. 3 cm long; bracts lanceolate, 1 cm long. Flowers usually 2, pale green, ca. 1.5 cm across; sepals ovate-triangular, 1 cm long, 5 mm wide, acute and usually incurved at apex, truncate at base, with 5 purplish veins; petals sometimes tinged with purple, lanceolate, 8 mm long, acuminate and thickened at apex, ciliate near base; lip of a orbicular disc with a cuspidate tip, fleshy and rigid, 6 mm long, concave, disk with 3 low longitudinal ridges at center and 2 elevated calli at base; column 5.5 mm long, foot 5 mm long; anther transversely elongate, 4celled; pollinia ovoid, attached to a clavate hyaline viscidium.

HSINCHU: Tapachienshan, Lin s. n. Aug 1972. NANTOU: Chitou, Su 60. KAOHSIUNG: Liukuei, Su s. n. Sep 1969; Dona, Su et al. 7526*.

India, the Himalaya, southern China, Myanmar, Vietnam and Thailand. Taiwan, forests, 1000-1800 m, throughout.