Rhizome stout, 5-6 mm in diam., rigid, with dense, brown, scaly sheaths. Pseudobulbs 1.2-1.8 cm apart on rhizome, not lucid, narrowly oblong, slightly narrowed toward apex, 3.5-4 cm × 8-11 mm, longitudinally channeled when dried, with 1 leaf at apex, sheathing at base; sheaths 3-3.5 cm, later deciduous. Leaf blade elliptic, 9-15 × 4-5.2 cm, thickly leathery, apex shortly acuminate; petiole 2-8 cm. Inflorescence initially synanthous becoming hysteranthous, pseudobulb and inflorescence basally embraced by sheaths at anthesis, but leaves completely stretching out, 15-22 cm; rachis 4.5-10.5 cm, 3-or 4-flowered, base with 1 amplexicaul sterile bract; floral bracts deciduous, narrowly oblong, ± cymbiform, 1.5-1.7 cm, papery; pedicel and ovary 10-15 mm. Flowers ca. 2.5 cm in diam., with sepals and petals white, lip white with yellow on mid-lobe. Sepals narrowly ovate or subovate-lanceolate, 18-20 × 6-7 mm, 5-veined, apex acuminate. Petals ovate, 14-15 × 5-6 mm; lip suboblong-obovate, 18-20 × ca. 9 mm, apex subtruncate or obtuse-rounded; callus with 3 longitudinal lamellae extending from base of lip to above middle. Column 8-10 mm, both sides winged; wings dilated at apex, to 5 mm wide, apex truncate. Fl. Nov-Dec.
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