Rhizome creeping, 2-3 mm in diam., usually branching, densely covered with maroon sheaths when young. Pseudobulbs borne 3-9 cm apart on rhizome, narrowly ovoid to cylindric-ovoid, 15-40 × 5-8 mm, 2-leaved, usually enclosed by sheaths at base. 

Leaf blade ovate-elliptic or elliptic, 2.5-7 × 1.2-2.8 cm, leathery, rigid, bilobulate; petiole 5-11 mm. 

Inflorescence terminating in a solitary flower, 2-3 cm, with 2 or 3 sterile basal bracts; peduncle 5-7 mm, enclosed in membranous sheaths; floral bract ovate, small, membranous. Flower ca. 3 cm in diam.; sepals and petals greenish, usually with obscure pale red-purple markings abaxially, lip greenish, densely spotted with red-purple; pedicel and ovary 1.5-2 cm. Dorsal sepal lanceolate, 18-23 × 5-6 mm, obscurely 5-veined; lateral sepals obliquely lanceolate-ovate, 15-19 × 9-10 mm, obscurely 7-veined. Petals linear-lanceolate, 15-21 × 1.5-2 mm, 1-veined; lip ovate-orbicular in outline, 10-15 × 14-20 mm, 3-lobed; lateral lobes erect-incurved, ovate, ca. 11 × 6 mm; mid-lobe broadly ovate, 8-10 × 8-10 mm, acute; disk with 3 indistinct keels and at their top a callus. Column 4-5 × 4-5 mm, stout, foot 5-7 mm. Fl. Jul-Sep.