Herbs, epiphytic. Pseudobulbs densely arranged, ovoid, ovoid-oblong, or narrowly ovoid-cylindric, 0.8-1.8(-3) cm × 4-8 mm. Leaf 1; petiole 1-7(-10) cm, articulate; blade narrowly oblong-oblanceolate, oblanceolate, or narrowly elliptic-oblong, (5-)8-22 cm × (5-)11-33 mm, papery, base contracted into petiole, apex acuminate. Inflorescence 7-24 cm; peduncle somewhat compressed, both sides with very narrow wings; rachis arching or pendulous, 5-12 cm, several to 20-flowered; floral bracts narrowly lanceolate, 3-8(-13) mm. Flowers often yellowish green, sometimes slightly tinged with brown, rarely nearly white; pedicel and ovary 4-15 mm. Dorsal sepal ovate-lanceolate to oblong-lanceolate, 5.2-8 × 1.3-2.3 mm, apex subacute to obtuse; lateral sepals obliquely oblong-lanceolate to elliptic, 5-7 × 1.5-2 mm, apex obtuse. Petals narrowly linear, 5.2-8 × 0.4-1 mm; lip broadly oblong-obovate, 5-6.5 × 4-5.5 mm, apical margin entire to slightly irregular, apex emarginate to subtruncate-rounded, broadly apiculate, at base with 2 variously shaped calli, in profile appearing low, rounded, triangular to digitate. Column arcuate, 2.6-3.4 mm, apex with 2 falcate, triangular wings; anther cap ca. 1 mm. Capsule obovoid-ellipsoid, 8-10 × 5-6 mm; fruiting pedicel 8-10 mm. Fl. Aug-Oct, fr. Mar-May. 2n = 38, 42.
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