Plants 19-32 cm tall. Tubers oblong or ellipsoid, 10-20 × 5-10 mm. Stem green, 7.5-9 cm, stout, with 2 tubular sheaths at base, 2-or 3-leaved. Leaves cauline, alternate, widely spaced, green, narrowly oblong, oblong, or ovate, lowest one 3.5-7 × 1-4 cm, becoming smaller above, glabrous, apex acute or acuminate. Inflorescence erect, green, 12-17 cm, glabrous; rachis 4.5-11 cm, 2-6-flowered; floral bracts ovate-lanceolate, to 15 mm, shorter than ovary, apex acuminate. Flowers violet, medium-sized; ovary cylindric, 20-22 mm including pedicel, densely minutely pubescent. Sepals minutely papillose on both surfaces, margin sometimes finely ciliate; dorsal sepal erect, elliptic, 8-10 × 3-4 mm, 3-veined, apex obtuse; lateral sepals reflexed, obliquely ovate, 9-11 × ca. 5 mm, 3-or 4-veined, apex obtuse to acute. Petals erect, forming a hood with dorsal sepal, obliquely ovate, shorter than dorsal sepal, both surfaces densely minutely papillose, 3-veined, margin conspicuously ciliate, apex acute; lip reflexed, broadly obovate, 12-15 × 10-12 mm, both surfaces densely minutely papillose, spurred, margin ciliate, 3-lobed near middle; lobes variable; lateral lobes recurved, broadly ovate to transversely elliptic, 2.5-3 × 4.5-7 mm, apex obtuse-rounded or obtuse; mid-lobe oblong, square, ovate, or obovate, 3.5-6 × 2-3.8 mm, apex acute, truncate, or emarginate and sometimes apiculate at center; spur pendulous, cylindric, stout, 18-22 × 2-3 mm, nearly as long as to slightly exceeding ovary, apex obtuse. Fl. May-Jul.
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