Plants 25-80 cm tall. Tubers ovoid or globose, fleshy. Stem erect, terete, with 5-7 leaves below middle. Leaf blade linear, 9-20 × 3-7 cm, base amplexicaul-sheathing, apex acuminate. Raceme 8-20-flowered, 5-16 cm; rachis glabrous; floral bracts lanceolate to ovate-lanceolate, basal ones ca. 1.5 cm, shorter than ovary, apex long acuminate; ovary twisted, slightly arching, cylindric, including pedicel 1.8-2 cm, glabrous. Flowers white or greenish white, glabrous. Dorsal sepal forming a hood with petals, erect, ovate or broadly ovate, concave, 5.5-6 × 3.5-4 mm, 5-veined; lateral sepals reflexed, obliquely ovate, 6-7 × 4-5 mm, 4-or 5-veined, apex subacute. Petals 2-lobed; upper lobe 5-5.5 × 3.5-4 mm; lower lobe a short tooth, apex shallowly 2-lobed; lip spreading, ca. 15 mm, deeply 3-lobed near middle and ± cross-shaped; lobes linear, 8-9 × 0.5-0.6 mm; lateral lobes spreading at acute angles to mid-lobe, apex fimbriate; mid-lobe entire; spur pendulous, 2.5-3.5 cm, longer than ovary, slightly thickened toward end, apex obtuse; stigmas oblong. Fl. Jul-Sep. 2n = 28.
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