Plants 5-7 cm tall. Tubers subglobose to ellipsoid, 7-10 × 5-7 mm. Leaf usually solitary, or occasionally with a second smaller subopposite leaf, basal, oblong, 3.5-8 × 1.4-3.8 cm, pubescent, base directly sheathing stem, apex subacute. Inflorescence erect, 5-6 cm, pubescent; floral bracts broadly ovate, shorter than ovary, pubescent, apex acute. Flower solitary, erect, white, large; ovary and pedicel 11-15 mm, pubescent. Sepals spreading, ovate-oblong, 11-16 × 8-12 mm, outer surface sparsely pubescent, apex acute. Petals spreading, orbicular-reniform, 10-21 × 7-17 mm, apex subacute; lip spreading, broadly obovate, 16-22 × 15-23 mm, apex entire to shallowly emarginate and with a small acute tooth; spur pendulous, strongly incurved, cylindric, 3.5-4.5 cm, slender, attenuate, apex acute. Fl. Jul-Aug.
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