Pseudobulbs cylindric, 6-7 × 1.2-1.5 cm, with 3 sheaths, 2-leaved near apex. Leaf blade spatulate to obovate-lanceolate, 36-40 × 5-6 cm, with 7-10 main veins, base attenuate, apex acuminate. Inflorescences lateral or subterminal, 40-50 cm, many flowered, sheathing at base; rachis rusty pubescent; floral bracts deciduous, ovate-lanceolate, 1.2-1.5 cm. Flowers fragrant, white, sepals rusty pubescent abaxially; pedicel and ovary nearly as long as floral bracts, rusty pubescent. Dorsal sepal lanceolate, 15-20 × ca. 4 mm, long acuminate; lateral sepals falcate-lanceolate, 15-20 × 4-5 mm, long acuminate; mentum ca. 5 mm. Petals lanceolate, 15-20 × ca. 4 mm, long acuminate; lip ovate-lanceolate in outline, ca. 14 × 7-8 mm, 3-lobed; lateral lobes suberect, oblong, 6-7 mm, obtuse; mid-lobe oblong-lanceolate, 7-8 × ca. 3 mm, acuminate; disk with 3 or 5 lamellae extending to near apex of mid-lobe. Column ca. 5 mm (with anther cap), thickened, foot 5-6 mm. Fl. Aug-Oct. 2n = 36.
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