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Leaves 8–10, spaced along stem, the 2 lowermost sheathing, the mid-cauline largest and up to 22 × 5 cm, broadly lanceolate, acute.
Petals 8–12 × 3 mm, erect, the basal part rounded, adnate to dorsal sepal; the upper part narrowing abruptly to an acuminate apex.
Dorsal sepal 3–4.5 × 4–4.6 mm, erect; lateral sepals 10–11 × 3.5 mm, reflexed, curled.
Inflorescence 16–30 × 5–6 cm, rather laxly many-flowered; bracts 17–18 mm long.
Terrestrial herb 30–70 cm high, with ellipsoid tubers c. 2 cm long.
Pedicel c. 15 mm long, spreading; ovary arched, 12–13 mm long.
Sepals and lip green, petals white, densely pubescent.
Anther 2.8–3.8 mm high; canals 2–3 mm long.
Stigmatic arms c. 3.5 mm long.