Pseudobulbs borne 1-2 cm apart on rhizome, cylindric-conic, 5-7 cm × 8-20 mm, 1-leaved. Leaf blade narrowly elliptic, strongly plicate, 20-34 × 4.5-7.5 cm, papery, 5-veined, base cuneate, apex shortly acuminate; petiole ca. 10 cm. Peduncle to 50 cm, glabrous, with 4 or 5 sheaths; rachis laxly ca. 10-flowered; floral bracts lanceolate, 1-1.3 cm, acuminate. Flowers green with reddish brown spots, lip white or yellowish spotted with purple, column white; pedicel and ovary to 2 cm. Dorsal sepal oblong, 12-14 × ca. 3 mm, 5-veined, subobtuse; lateral sepals falcate-oblong, 10-16 × ca. 3.5 mm, 5-veined, apex subobtuse; mentum conic, ca. 2 mm. Petals falcate, 12-14 × 4-5 mm; lip 8-10 mm, base with 2 small auricles, 3-lobed near middle; lateral lobes erect, ovate-triangular, rounded; mid-lobe broadly elliptic or orbicular, concave; disk with 3 lamellae, lateral 2 incurved at middle, median shorter. Column 6-8 mm, winged, near middle with 2 auricles, base dilated, foot ca. 3 mm; pollinia pyriform. Fl. Apr-Jun. 2n = 36.
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