Rhizome creeping and rooting, 3-4 mm in diam. Pseudobulbs often 1-2 cm apart on rhizome, ovoid or ovoid-conic, 1.3-3.5 cm, 1-2 cm in diam., with a terminal leaf. Petiole 1-2 cm; leaf blade oblong, 8-19 × 1.3-2.8 cm, leathery, apex obtuse and emarginate. Scape from base of pseudobulb, erect, 8-12 cm; umbel often 2-4-flowered; peduncle 1.5-2 mm in diam., with 2 tubular sheaths ca. 1 cm; floral bracts lanceolate, ca. 9 mm, concave. Pedicel and ovary ca. 2 cm. Flowers dark greenish yellow or dark brown with purplish apex except whitish lip. Dorsal sepal ovate, concave, ca. 9 × 5 mm, apex acute; lateral sepals falcate-lanceolate, ca. 15 × 5 mm, base adnate to column foot, twisted near base, their lower edges of basal part connate, apex obtuse. Petals ovate, ca. 7 × 5 mm, entire, obtuse-rounded; lip recurved, ligulate, ca. 5 mm, fleshy, base subcordate, apex obtuse. Column ca. 2 mm, stout, with deltoid, rounded wings along lower margins; foot ca. 5 mm, with free part ca. 1.5 mm; stelidia deltoid, ca. 1 mm; anther cap subglobose. Fl. Apr-Jun. 2n = 38.
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