Pseudobulbs enclosed in tubular sheaths when young, brownish yellow when dried, subcylindric, 3.5-4.5 cm × 6-7 mm, grooved, usually with roots at joint. Leaf blade narrowly oblong or narrowly elliptic, 5-16 × 1.3-1.7 cm, acuminate; petiole 1-2 cm. Inflorescence synanthous; peduncle 3-7.5 cm, sheathed; rachis ca. 7 cm, slender, weakly zigzag, laxly 8-or 9-flowered; floral bracts caducous, ovate-lanceolate, ca. 5 × 5 mm. Flowers uniformly white, 1-1.8 cm in diam.; pedicel and ovary 5-6 mm. Dorsal sepal narrowly oblong, 7-8 × 1.4-1.6 mm, 3-veined, acuminate; lateral sepals slightly oblique. Petals narrowly oblong-lanceolate, 6-7 × 1.2-1.5 mm, 3-veined, acute; lip 3-lobed; lateral lobes embracing column, reaching 1/5-1/4 of its length; mid-lobe oblong, ca. 6 mm, adaxially ± papillate, apex apiculate; sac with a thickened longitudinal ridge inside. Column 5-6 mm; rostellum broadly ligulate. Fl. Jun-Jul.
An epiphytic plant growing in evergreen, broadleaved forests; at elevations from 1,300-1,500 metres.
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