Stem : Rhizome stout and hard and densely sheathed. Pseudobulbs dense, spacing 1.5-2cm ; it is long conical and slightly flat, often with several longitudinal edges, narrowing to the top, about 6.5-11.5cm long, about 1-2cm in diameter, light brown or chestnut after drying, with wrinkles ; there are 2 leaves at the top and several sheaths at the base. The residual sheath at the base of the old pseudobulb is gray or dark gray fibrous.

Leaves : Leaves hard leathery, broad lanceolate or obovate lanceolate, about 13.8-24.5 cm in length, 3.1-4.3 cm in width, apex acuminate or slightly short-tailed, petiole base gradually narrow.

Flowers : racemes on the top of pseudobulbs, inflorescence axis green upright or tilted, with 4-7 flowers, flower diameter of about 4.5 cm, light yellow green, lip with black ; pedicels together with ovary ca. 1.8-2.5 cm, pale green, with 6 sides ; bracts broadly lanceolate, brown chestnut or pale yellow, ca. 2 cm long, ca. 0.6-0.9 mm wide, apex acuminate ; the sepals and petals are slightly keel-like ridges on the back, and the sepals are more prominent ; middle sepals lanceolate, ca. 3. 2 cm long, 0. 8-1. 1 cm wide, apex acuminate or acuminate ; petals lanceolate, ca. 2. 6 cm long, 0. 5 mm wide, apex acuminate or acuminate ; lateral sepals lanceolate, ca. 2.9 cm long, ca. 0.9 mm wide, apex pointed or acuminate ; lip flap 3-lobed, bilateral lobes nearly oblong or semilunar, erect, with black dots on the front, margin entire ; lobes triangular or suborbicular, base with yellow patches, with 3 folds extending from near base to near apex, margin undulate ; lip disc black spots or black granular. Pistils green, abaxially convex, both sides with broad wings, peduncle black. 

Flowering : May.

Fruit :