A terrestrial herb 3–9 dm. high, glabrous except for the roots and petals.. Tubers ovoid or ellipsoid, 2–3 cm. long, 1–1.5 cm. in diameter, ± tomentose.. Stem erect, slender to rather stout, leafy throughout its length.. Leaves 10–16, the lowermost 1–3 reduced to sheaths, sometimes whitish with green reticulate veins, the middle 5–7 suberect or ± spreading, linear or lanceolate-linear, acute, the largest 10–20 cm. long and 1–2 cm. broad, the upper ones adpressed to the stem, lanceolate, acuminate, often overlapping, similar to the lower bracts.. Inflorescence 10–24 cm. long, 3.5–5 cm. in diameter, rather densely 10-to many-flowered.. Bracts lanceolate, acuminate, rather thin and scarious, 1–3 cm. long, usually shorter than the pedicel with ovary.. Flowers suberect or curving outwards, green; pedicel with ovary straight or ± curved, 2–3 cm. long.. Dorsal sepal reflexed, narrowly elliptical, obtuse, convex, 5–6 mm. long, 2–3 mm. broad; laterals deflexed, obliquely semi-orbicular or obovate, apiculum to one side, 6–8.5 mm. long, ± 4 mm. broad.. Petals bipartite nearly to the base; posterior (upper) lobe recurved, linear, ciliolate, 4–6.5 mm. long, ± 0.5 mm. broad; anterior lobe decurved and spreading, narrowly lanceolate, acute, 7.5–12 mm. long, ±1.5 mm. broad.. Lip deflexed, tripartite nearly to the base; middle lobe ± incurved, linear, obtuse, 8.5–11.5 mm. long; side lobes lanceolate-linear, tapering towards the apex, nearly as long as the middle lobe; all lobes nearly 1 mm. broad.. Spur ± parallel to the ovary, twisted in the middle, swollen in the apical half, 1.8–2.5 cm. long.. Anther stalked, 3–4.5 mm. high, stalk ± 2 mm. long, canals much incurved, nearly 2 mm. long.. Stigmas porrect, rather thick and slightly widened at the truncate apex, 2–3 mm. long.. Rostellum narrowly triangular, acute, 1–2 mm. long.
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Lip 3-lobed almost to base; mid-lobe 8.5–11.5 mm long; side lobes slightly shorter; all lobes linear, 0.5–1 mm wide; spur 15–25 mm long, twisted in middle, swollen at apex, lying parallel to pedicel and ovary.
Leaves 4–16, the lowermost 1–3 sheathing, sometimes white with green reticulate veining; the uppermostgrading into the bracts; the middle leaves suberect, the largest 8–20 × 0.7–2 cm, linear or lanceolate.
Petals ciliolate, 2-lobed almost to base; upper lobe 4–6.5× c. 0.5 mm, linear, curving back; lower lobe 7.5–12 × 1–1.5 mm, narrowly lanceolate, spreading downwards.
Dorsal sepal reflexed, 4–6 × 1–3 mm, elliptic; lateral sepals deflexed, 6–8.5 × 3–4 mm, obliquely obovate with a lateral apiculum.
Column 3–4.5 mm long, including a sterile stalk 1.5–2 mm long; anther canals c. 2 mm long, incurved.
Inflorescence 10–25 × 3–5 cm, densely several-to many-flowered; bracts scarious, 1–2 mm long.
Terrestrial herb to 60 cm tall; tubers 2–3 × 1–1.5 cm, ovoid or ellipsoid.
Stigmatic arms 2–3 mm long, porrect, fairly stout, truncate at apex.
Pedicel 18–20 mm long, ovary 8–12 mm long, together ± straight.
Rostellum mid-lobe c. 2 mm high, triangular.
Flowers green or green and white.
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