Pseudobulbs greenish yellow when dry, cylindric to fusiform, 2.5-11 cm × 7-13 mm, sparsely wrinkled. Leaf blade narrowly elliptic to narrowly elliptic-lanceolate, 7-20 × 2.1-4.1(-5.7) cm, acuminate or obtuse; petiole 1-2.5 cm. Inflorescence synanthous, ± arching, 15-20 cm; rachis 7-10 cm, laxly several flowered; floral bracts caducous. Flowers white, sometimes slightly tinged with yellowish on abaxial surface of sepals and lip; pedicel and ovary 5-8 mm. Dorsal sepal suboblong or oblong-oblanceolate, 11-13 × ca. 2.5 mm, dorsally somewhat carinate, 5-veined, apex acute or obtuse; lateral sepals suboblong, similar in size to dorsal sepal. Petals sublinear, 11-13 × ca. 0.8 mm, 3-veined; lip 3-lobed; lateral lobes erect, embracing column, reaching 1/3-1/2 length of column, oblong, 3-4 × 1.5-2 mm; mid-lobe ovate-elliptic, 6-7 × 4-5 mm, base narrowed into a claw ca. 1 mm, apex acute; sac with 3 thickened and 2 shorter ridges extending nearly to base of mid-lobe. Column ca. 1 cm, upper part winged; anther with long beak to 2 mm; rostellum narrowly lanceolate, 1.5-2 mm. Capsule obovoid-ellipsoid, to 2 cm × ca. 9 mm. Fl. and fr. Oct-Dec. 2n = 40.
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