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Lip 3-lobed to 1–2 mm from base; mid-lobe 12–18 × 1 mm, linear, deflexed; side lobes 25–50 mm long, filiform, ± deflexed; spur 5–7.5 cm long, slender, incurved.
Petals 2-lobed ± to base; posterior lobe 7.5–9.5 × c. 1 mm, linear, lying beside dorsal sepal; anterior lobe 25–40 mm long, filiform, spreading or deflexed.
Dorsal sepal erect, 7.5–11 × 4–6 mm, ovate, convex; lateral sepals reflexed, 10–12 × 4–6 mm, very obliquely ovate.
Inflorescence 10–27 × 5–9 cm, densely 12-to many-flowered; bracts 10–20 mm long, lanceolate, acute.
Robust terrestrial herb 30–60 cm tall; tubers 1–2 cm long, ± globose, pubescent.
Stem erect, with 2 basal leaves and 6–10 bract-like leaves along its length.
Anther 4.5–7.5 mm high, erect, apiculate; canals upcurved, 3–4 mm long.
Pedicel 10 mm long, ovary 25–30 cm long with 6 lightly toothed keels.
Stigmatic arms 5–7 mm long, porrect, club-shaped, truncate at apex.
Flowers white, semi-erect or spreading.
