Plants 28-55 cm tall. Rhizome elongate, thick. Pseudobulbs subglobose, ca. 1 cm in diam., with 3 sheaths. Leaves 2-4, basal, not well developed at anthesis, not deciduous; blade obovate-elliptic or elliptic, 15-30 × 4-8 cm, papery, abaxially densely puberulent, apex acute; petiole-like base (6-)27-30 cm, usually forming a pseudostem 13-20 cm. Scapes 1 or 2, arising from leaf axils, 25-60 cm, densely puberulent; rachis 6-25 cm, laxly to subdensely 8-20-flowered; floral bracts persistent, narrowly lanceolate, ca. 5 mm, glabrous, apex acute. Flowers white or pink, occasionally flushed purple; pedicel and ovary 15-20 mm, puberulent. Dorsal sepal oblong-lanceolate, 12-17 × 5-8 mm, abaxially puberulent, 5-veined, apex acuminate; lateral sepals oblong, oblique, 12-17 × 4-7 mm, abaxially puberulent, 5-veined, apex acute. Petals narrowly obovate or elliptic, 11-15 × 2.5-4.5 mm, glabrous, 3-veined, apex subacute; lip adnate to entire length of column wings, flabellate, 8-16 × 8-12 mm, 3-lobed above middle; lateral lobes subsquare to suborbicular, falcate, 5-6 × 4-6 mm, apex obtuse-rounded; mid-lobe subsquare to oblate, 3-4 × 4-5 mm, margin slightly undulate, apex emarginate and apiculate in sinus; disk with 3-5(-7) ridges; ridges fleshy, extending almost to apex of mid-lobe, apices raised and triangular; spur cylindric, 20-32 mm, outside puberulent, inside villous. Column ca. 6 mm, dilated at apex, ventrally puberulent, wings decurrent to lip and connecting to ridges on disk; rostellum 2-lobed; anther cap beaked; pollinia clavate, unequal in size, 1.5-2 mm, with short caudicles; viscidium subelliptic, ca. 0.5 mm. Fl. Feb-May. 2n = 40.
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