Rhizome short, 5-6 mm in diam., densely covered with scaly sheaths, with many roots. Pseudobulbs contiguous, nearly narrowly oblong, 1.8-6 cm × 6-11 mm, slightly obtusely 4-ridged, apex 1-leaved. Leaf blade narrowly elliptic-oblanceolate to narrowly oblong-oblanceolate, 10-23 × 2.3-5.5 cm, papery, apex acute or acuminate and mucronate; petiole 1-4 cm. Inflorescence arising from young pseudobulbs, with nearly mature or immature leaf at anthesis, 10-25 cm; rachis nodding, densely many flowered; floral bracts broadly ovate-sagittate, conduplicate, concave, 3-5 mm, pubescent on margin, with many somewhat loosely arranged veins, acute to obtuse. Flowers white, slightly tinged with reddish; pedicel and ovary 3-4 mm. Dorsal sepal broadly elliptic, concave, 4-5 × 2.5-3 mm, dorsally carinate, apex acute; lateral sepals broadly ovate-oblong, oblique, 5-6 × 3-3.5 mm, dorsally carinate, ± connate at base. Petals ovate-elliptic, ca. 4 × 2-2.5 mm; lip shallowly saccate, 4-6 mm, 3-lobed; lateral lobes ovate, 1.5-2 mm; mid-lobe transversely oblong, ca. 3 × 4 mm, apex emarginate; saccate disk with 2 or 3 thick veins near base. Column ca. 3 mm, both sides with wings; wings above middle broader and nearly orbicular in ventral view. Capsule subobovoid, ca. 1 cm × 6 mm; fruiting pedicel 2-3 mm. Fl. Jun-Jul, fr. Oct. 2n = 40.
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