A terrestrial herb 2–7.5 dm. high, glabrous except for the roots and petals.. Tubers globose to ovoid, 1–2 cm. long and in diameter, densely tomentose.. Stem erect, slender to rather stout, leafy throughout its length.. Leaves 7–14, the lowermost rarely reduced to a sheath, the middle ones bunched in the lower part of the stem, suberect or spreading, narrowly lanceolate to oblong-lanceolate, acute, the largest 7–22 cm. long and 1–3 cm. broad, the upper 3–6 much smaller, adpressed to the stem, lanceolate, acuminate.. Inflorescence 6–27 cm. long, 4–6 cm. in diameter, rather loosely 5-to many-flowered.. Bracts lanceolate, acuminate, 1–2.5 cm. long, usually distinctly shorter than the pedicel with ovary.. Flowers spreading, green with white centre, fragrant at night; pedicel with ovary curved, 1.8–2.5 cm. long.. Dorsal sepal reflexed, narrowly elliptical, obtuse, convex, 5–7.5 mm. long, 3–4 mm. broad; laterals deflexed, obliquely obovate or semi-orbicular, apiculum somewhat lateral, 7.5–10 mm. long, 5–6.5 mm. broad.. Petals bipartite nearly to the base; posterior (upper) lobe ± reflexed, linear or ligulate, 5.5–7 mm. long, ± 1 mm. broad, ciliolate; anterior lobe spreading forwards, lanceolate, curved, 9–18 mm. long, 1.5–2.5 mm. broad, ciliolate.. Lip deflexed, tripartite from an undivided base just over 1 mm. long; middle lobe linear, obtuse, 1–1.7 cm. long, 0.5–1 mm. broad; side lobes linear-lanceolate, acute, 6.5–12 mm. long, as broad as or broader than the middle lobe.. Spur parallel to the ovary or ± incurved, twisted in the middle, much swollen in the apical half, 1.5–2 cm. long.. Anther ± 3 mm. high, loculi reclinate, canals porrect or slightly incurved, 4–6 mm. long.. Stigmas porrect, widened and truncate at the apex, 4–6 mm. long.. Rostellum narrowly triangular, 1–2.5 mm. long.
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An orchid. It grows 30-50 cm tall. The tubers are round or oval. They are 1-2 cm across. The stems are erect and leafy. The leaves are narrowly oval and 30 cm long by 3.5 cm wide. They taper to the tip and sheath the stem at the base.
Stem leafy; leaves 6–14, the lowermost sometimes sheath-like, the next 6 or so large, semi-spreading, set fairly close together in lower part of stem, 6–19 × 1–2.5(3.5) cm, lanceolate; uppermost leaves grading into the bracts.
Lip 3-lobed to 1–1.5 mm from base; mid-lobe 11–20 mm long; side lobes 6.5–15 mm long; all lobes linear, c. 1 mm wide; spur 14–20 mm long with 1 twist in middle, swollen in apical half, horizontal or ± incurved.
Petals ciliolate, 2-lobed almost to base; upper lobe 5–7 × c. 1 mm, linear, erect; lower lobes pendent, hinged, 9–18 × 1.5–2.5 mm, curved lanceolate, acute.
Dorsal sepal reflexed, 5–7.5 × 3–4 mm, elliptic; lateral sepals deflexed, 7.5–10 × 5–6.5 mm, obliquely obovate with a lateral apiculum.
Inflorescence 6–20 × 3–6 cm, fairly laxly several-to many-flowered; bracts 10–18 mm long, usually shorter than pedicel and ovary.
Flowers green, white in centre, with a strong, sweet, sickly smell, especially at night.
Stigmatic arms 3.5–6 mm long, porrect, enlarged and truncate at apex.
Terrestrial herb 20–75 cm tall; tubers 1–2 cm long, globose or ovoid.
Pedicel and ovary 20–32 mm long, somewhat arched.
Anther c. 3 mm high, canals porrect, 4–6 mm long.
Rostellum mid-lobe c. 2 mm long.
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