Plants usually slender, 12-35 cm tall. Stem slender, 1-or 2-leaved. Leaves basal, lanceolate-oblong to narrowly ovate, 4-15 × 2-5 cm, apex acuminate to acute. Peduncle 6-17 cm; rachis 4-13 cm; floral bracts to 2 cm. Flowers usually hermaphroditic or rarely with stamen abortive or absent. Dorsal sepal 5-6 × ca. 1.3 mm; lateral sepals oblong-spatulate, 5-6 × ca. 1.5 mm. Petals narrowly oblong-oblanceolate, 4-5 × ca. 1.2 mm, margin often ciliate; spurs conic, 3-6 mm, shorter than ovary, stout, rarely saclike or absent altogether (in spurless or shortly spurred flowers, male organs reduced to varying degrees; in extreme cases column entirely pistillate and lip absent). Fl. and fr. Aug-Oct.
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