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Lip 3-lobed to 2–3.5 mm from base; mid-lobe 9–13 × c. 0.5 mm, side lobes 6–11.5 mm long, slightly narrower than mid-lobe; all lobes linear; spur 8–10(13) mm long, twisted in the middle and swollen at the apex, usually incurved with a knee-like bend at about halfway.
Petals 2-lobed almost to base; upper lobe 4.5–7.5 × c. 1 mm, linear, reflexed, papillose and ciliolate; lower lobe spreading forwards or deflexed, 8–16 × 1–1.5 mm, narrowly lanceolate, glabrous or papillose but not ciliate on margin.
Stem leafy; leaves 7–11, the lowermost sometimes sheathing, the next 4–6 semi-erect or spreading, 7–26 × 0.5–2(2.5) cm, linear to lanceolate, acute; upper leaves becoming bract-like.
Dorsal sepal 5–7.5 × 2–3.5 mm, elliptic, reflexed; lateral sepals deflexed, 7–10 × 3.5–6 mm, obliquely obovate with a lateral apiculum.
Inflorescence 5–27 × 3–5.5 cm, several-to many-flowered; bracts 8–25 mm long, usually shorter than pedicel and ovary.
Pedicel and ovary 16–25 mm long, straight or more often bent at the junction so that the flowers are drooping.
Anther 2–3 mm high, the loculi reclinate; canals 4–6 mm long, porrect, the tips turned up.
Stigmatic arms 5–7.5 mm long, porrect, slender but enlarged and truncate at the apex.
Rostellum mid-lobe c. 2 mm long, narrowly triangular, acute.
Flowers green, white in centre, with an unpleasant smell.
Tubers 1–2.5 × 0.5–1 cm, ovoid to ellipsoid.
An erect terrestrial herb up to 2 ft. high
Flowers greenish white in lax racemes
Terrestrial herb 20–100 cm high.
