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Dorsal sepal 16.5–20 × 11–13 mm, convex, ovate, erect; lateral sepals 20–22.5 × 5–6.5 mm, spreading; apical parts of sepals puberulous.
Stem leafy; leaves 6–7, the lowest 2–3 sheathing, the largest in the middle, semi-erect, up to c. 14 × 2 cm, lanceolate, acute, ribbed.
Inflorescence 5–32 cm long, ± lax, up to 18-flowered; ovary c. 35 mm long, pedicel 25 mm long; bracts leaf-like, up to 9.5 cm long.
Upper branch of stigma 12.5–14 mm long, papillose at apex, lower branch 8–9 mm long.
Petals 17–20 × 5–6 mm, ciliolate in upper half, lying ± inside dorsal sepal.
Spur 5.5–7.5 cm long, swollen at apex, usually tucked into the bract.
A robust terrestrial herb, drying dark brown; tubers ellipsoid.
Flowers white, greenish-cream or greenish-yellow.
Anther 10–11 mm high; canals 18 mm long.
Auricles 1.5–2 mm long.
