Herbs, lithophytic. Pseudobulbs approximate, 2.5-4 cm, ca. 1 cm in diam. at base, ca. 0.4 cm in diam. at apex, 1-leaved, ovoid-subcylindric, covered by several subacuminate sheaths, largest 3 sheaths 2.5-7 cm. Leaf petiole 1.8-3.2 cm; blade oblong-ligulate to ligulate-oblanceolate, 17.7-24.6 × 3.4-4.4 cm, thin, apex acute. Inflorescence terminal, 18-20.8 cm, narrowly winged; peduncle 8-8.8 cm; rachis 10-12 cm, laxly ca. 20-flowered; floral bracts lanceolate, ca. 8 mm, apex acute. Flowers orange; pedicel and ovary to 13 mm. Dorsal sepal oblong-lanceolate, ca. 9 × 2.4 mm, apex obtuse; lateral sepals oblong-lanceolate, ca. 8.7 × 2.3 mm, apex subacute. Petals linear-lanceolate, ca. 9 × 1 mm, apex acute; lip broadly obovate (flattened), 7.5-8 × 7.5-8 mm, in natural state with a subtubular basal third expanded into a transversely elliptic blade, basal margins entire becoming irregularly suberose toward apex, basally with a single callus divided into 2 narrowly conic lobes. Column arcuate, subterete, ca. 3 mm, subapically with triangular, subfalcate, subacute wings. Fl. Oct-Nov.
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