Plants 40-61 cm tall. Tubers oblong or ellipsoid, 3-5 × 1-3 cm, fleshy. Stem erect, terete, slender, with 4-6 ± clustered leaves and 3-6 bractlike leaflets. Leaf blade oblanceolate, subspatulate, or oblong-lanceolate, 8-18 × 2.5-4.5 cm, base contracted into amplexicaul sheath, apex acute or acuminate. Raceme 25-43-flowered, 15-23 cm; floral bracts lanceolate to ovate-lanceolate, 8-10 × 3-4 mm, shorter than ovary, apex acuminate; ovary twisted, cylindric, including pedicel 16-18 mm. Sepals green, 3-veined; dorsal sepal forming a hood with petals, ovate, concave, 3.5-4 × 2.5-3 mm, apex obtuse; lateral sepals reflexed, obliquely ovate or ovate-oblong, 4-4.5 × ca. 2.5 mm, apex obtuse. Petals yellow, narrowly ovate-oblong, 3-3.5 × ca. 1.5 mm, 2-veined, apex obtuse; lip yellow, ca. 5 mm, thickly textured, 3-lobed from base; lobes narrowly oblong; lateral lobes reflexed, 3-4.5 × 1-1.5 mm, apex obtuse; mid-lobe suberect, 3.5-4.5 × 1-1.5 mm, apex adnate to tip of hood formed by dorsal sepal and petals; spur cylindric, ca. 21 × 1 mm, slender; connective narrow; pollinia ovoid; viscidia lanceolate, ca. 1.2 mm. Fl. Jul-Sep. 2n = 42.
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