A terrestrial herb 3.5–8.5 dm. high, glabrous except for the roots and petals.. Tubers globose, ovoid or ellipsoid, 1–3 cm. long, 1–1.5 cm. in diameter, rather densely tomentose.. Stem erect, rather stout, leafy throughout its length.. Leaves 7–11, the lowermost 2–3 reduced to sheaths, ± recurved, white with green reticulate veins, the 4–5 middle ones suberect, lanceolate to elliptical, the largest 5–14 cm. long and 1–3 cm. broad, the upper ones much smaller, adpressed to the stem, similar to the bracts.. Inflorescence 10-27 cm. long, 4–5.5 cm. in diameter, rather loosely 8–28-flowered.. Bracts lanceolate, acuminate, 1–2.5 cm. long, shorter than the pedicel with ovary.. Flowers curved outwards, green with lip and petals whitish; ovary with pedicel curved, 2–3 cm. long.. Dorsal sepal reflexed, narrowly elliptical, obtuse, convex, + 6 mm. long and 3 mm. broad; laterals deflexed, obliquely obovate, apiculum lateral, 7–9.5 mm. long, 4.5–6.5 mm. broad.. Petals bipartite nearly to the base; posterior (upper) lobe recurved, linear or ligulate-linear, denticulate towards apex, 5–6.5 mm. long, 1 mm. broad, ciliolate; anterior petal-lobe projecting forwards, lanceolate, acute, 8.5-11.5 mm. long, 1–2.5 mm. broad.. Lip deflexed, tripartite nearly to the base; middle lobe ± incurved, linear, 11–13.5 mm. long, scarcely 1mm. broad; side lobes narrowly lanceolate, acute, 7.5–11 mm. long, a little broader than the middle lobe.. Spur ± parallel to the ovary, somewhat swollen in the apical half, 2.5–3 cm. long.. Anther 2–3 mm. high, loculi reclinate, canals porrect or slightly incurved, nearly 4 mm. long.. Stigmas porrect, swollen and truncate at very apex, ± 4 mm. long.. Rostellum triangular, acute, ± 2 mm. long.
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Lip deflexed, 3-lobed almost to base; mid-lobe 11–14 × 1 mm, linear; side lobes 7.5–11 × 1.5 mm, narrowly lanceolate; spur 25–32 mm long, with 1 twist in middle, swollen atapex, parallel to pedicel and ovary.
Leaves 7–11, the lowermost 2–3 sheathing, white with dark green reticulate veining; the next few leaves semi-erect, the largest 5–16 × 1–3 cm, lanceolate; upper leaves grading into the bracts.
Petals 2-lobed almost to base; upper lobe 11–14 × 1 mm, recurved, slightly toothed towards tip; lower lobes spreading, 9–11.5 × 1–2.5 mm, lanceolate, acute.
Dorsal sepal reflexed, 5–7 × 2.5–3 mm, elliptic; lateral sepals deflexed, 7–9.5 × 4.5–6.5 mm, obliquely obovate with a lateral apiculum.
Inflorescence 10–27 × 4–6 cm, fairly laxly 8–30-flowered; bracts scarious, 10–20 mm long, shorter than the pedicel and ovary.
Terrestrial herb up to 80 cm tall; tubers 1–3 cm long, globose, ellipsoid or ovoid.
Pedicel and ovary slightly arched; pedicel 7–10 mm long, ovary 15–20 mm long.
Stigmas porrect, c. 4 mm long, enlarged and truncate at apex.
Anther 2–3 mm high; canals porrect, c. 4 mm long.
Rostellum mid-lobe c. 2 mm long, triangular.
Flowers pale green, curved outwards.
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