Plants 15-50 cm tall. Tubers oblong or ovoid, 1.5-3 × 1-1.5 cm, fleshy. Stem erect, terete, 3-5 mm in diam., pubescent, with 2 nearly opposite leaves at base. Leaf blade spreading horizontally, abaxially slightly tinged with grayish white, adaxially purplish green, suborbicular or ovate-orbicular, 3.5-4.6 × 3-4.7 cm, rather stout, base obtuse-rounded and amplexicaul, apex acute or subacuminate. Raceme 5-20 cm, 3-10-flowered; peduncle densely pubescent at base; rachis pubescent; floral bracts lanceolate or ovate, shorter than ovary, apex acuminate; ovary twisted, terete, including pedicel 2.5-3 cm, pubescent. Flowers white or whitish green. Dorsal sepal forming a hood with petals, erect, ovate or oblong, concave, 10-13 × 6-7 mm, 5-veined, apex obtuse; lateral sepals reflexed, obliquely ovate or oblong, 11-14 × 7-7.5 mm, 5-veined, apex acute. Petals deeply 2-lobed; upper lobe spatulate-oblong, ca. 12 × 6 mm, margin ciliate, apex obtuse; lower lobe much smaller, linear-lanceolate, 3-5 × 1-1.5 mm, apex acute or subobtuse; lip reflexed, much longer than sepals, base with a short claw, above base deeply 3-lobed; lateral lobes divaricate, linear-lanceolate, ca. 2.5 cm, circinate toward apex; mid-lobe straight, linear, ca. 1.2 cm, slightly wider than lateral lobes; spur pendulous, cylindric-subclavate, 2.5-3 cm, nearly as long as ovary, apex slightly obtuse; connective extremely wide; stigmas lanceolate. Fl. Jul-Aug.
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