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Robust terrestrial herb up to c. 1 m tall; roots several, fleshy, up to 12 × 1 cm, cylindrical, sometimes branched.
Dorsal sepal 5–6 × 3–5 mm, ovate, reflexed; lateral sepals 6–10 × 3–4 mm, ovate, deflexed or spreading, twisted.
Inflorescence 11–25 × 4.5–5 cm, densely many-flowered; bracts 17–22 mm long, lanceolate, acute.
Petals 5–10 × 3–4 mm, ovate, acute, entire, pointing forwards and more or less forming a hood.
Lip 8–13 × 1.5–2.5 mm, ligulate entire; spur (1.5)5.5–9 cm long, slender, pendent.
Stigmatic arms 2–2.5 mm long, clavate, usually joined near the tip.
Flowers white, the sepals turning green towards the apex.
A ground orchid up to 4 ft. high with leafy stem
Anther c. 2 mm tall, canals very short.
Ovary and pedicel 18–20 mm long.
Flowers white in dense spike
