Plants 14-38 cm tall. Tubers oblong or narrowly ellipsoid, 2.5-4 × 1-2.5 cm, fleshy. Stem erect, terete, glabrous, with 3 or 4 leaves and many bractlike leaflets. Leaf blade oblong or oblong-lanceolate, 4-12 × 1-1.5 cm, base amplexicaul, apex acuminate or acute. Raceme 8-20-flowered, 3-8 cm; floral bracts lanceolate, basal ones 1.5-1.7 cm, longer than ovary, ciliate; ovary twisted, cylindric-fusiform, including pedicel 15-18 mm. Flowers yellow, small. Dorsal sepal forming a hood with petals, erect, broadly ovate, concave, 3-4.5 × 3-3.5 mm, 3-veined, apex obtuse; lateral sepals reflexed, obliquely ovate-elliptic, 5-6 × 3.5-4 mm, 3-veined, apex obtuse. Petals obliquely oblong, 3-4 × 1.8-2 mm, 1-veined, unlobed; lip 9-10 mm, spurred at base, with a cupular structure near mouth of spur, spreading, 3-lobed from base; lateral lobes subulate, 1.5-3.5 mm; mid-lobe straight, linear, 7-8 × ca. 1 mm, apex obtuse; spur pendulous, cylindric-clavate, 10-17 mm, shorter than ovary, near middle geniculate-curved, slightly thickened from middle to apex; connective narrow; pollinia narrowly ellipsoid; caudicles linear, longer than pollinia; viscidia orbicular, small; stigmas suberect, exserted along both sides of spur mouth, oblong, 2-2.5 mm. Fl. Jun-Aug. 2n = 42 + 0-2B.
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