Rhizome stout, ca. 5 mm in diam., internodes 5-7 mm. Pseudobulbs borne 1-2 cm apart on rhizome, cylindric-conic, 4-6 cm × 7-12 mm, base slightly dilated, covered with membranous tubular sheaths. Leaf blade elliptic, 20-36 × 5-12.5 cm, papery, apex shortly acuminate; petiole 9-10 cm. Inflorescence erect; peduncle to more than 1 m, glabrous, covered with 4 or 5 sheaths 3-5 cm; rachis to 21 cm, laxly 8-12-flowered; floral bracts narrowly lanceolate, 1.2-1.5 cm. Flowers white; pedicel and ovary 2-2.5 cm, slender. Dorsal sepal narrowly oblong, 14-18 × ca. 3 mm, with inconspicuous veins, apex slightly obtuse; lateral sepals falcate-oblong, 14-18 × 3-4 mm, with 3 inconspicuous veins, apex obtuse, base adnate to apex of column foot; mentum spurlike, ca. 4 mm. Petals similar to lateral sepals, 13-17 × ca. 2 mm; lip obovate-cuneate, ca. 1 cm, 3-lobed; lateral lobes subovate, ca. 1 cm wide (flattened), apex obtuse; mid-lobe broadly obovate, 4-6 × 5-7 mm, concave, apex subtruncate; disk with 3 lamellae, median shorter. Column ca. 1 cm, winged, with conspicuous foot; wings with 1 decurved toothlike arm on either side of middle part. Fl. Apr.
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