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Plants slender, to 400 mm; leaves cauline, 4-8, suberect, oblong-lanceolate, acute, to 70 x 10 mm. Inflorescences lax, 1-7 (-19)-flowered; bracts lanceolate, acute, 10-25 mm long; pedicel plus ovary straight, 15-25 mm long. Flowers white with green veins on the petals and a green ovary. Median sepal erect, deeply concave, elliptic, acute, c. 10 mm long; lateral sepals deflexed, obliquely obovate, subacute, c. 11 mm long. Petals bipartite nearly to the base; upper lobe erect, linear, 8-9.5 mm long; lower lobe spreading forwards and curved upwards, linear, 10-13 mm long. Lip tripartite from near the base; midlobe linear, much longer than the side lobes, c. 12 mm long; side lobes linear, 5.5-8.5 mm long; spur clavate, c. 8 mm long. Anther acute, c. 4 mm tall, canals porrect with recurved apices, c. 7 mm long; stigmatic processes porrect, slender and abruptly clavate, 6-7 mm long; central rostellum lobe subulate, 2-3 mm long.
Terrestrial herb, up to 250 mm tall. Inflorescence laxly 1-4(-6)-flowered. Lateral sepals with an oblique apiculus. Petal lobes slender. Lip 3-lobed. Spur ± 9 mm long. Flowers white with sepals greenish on reverse.
Lip 3-lobed almost to base; mid-lobe deflexed, 12–14 × 1 mm, linear; side lobes 5.5–8.5 × 0.5 mm, ± filiform, projecting forwards but curving down slightly; spur 8–10 mm long, pendent, swollen at apex.
Leaves 4–8, the basal 1–2 usually sheath-like, the mid-stem leaves semi-spreading, the largest 3.5–8.5 × 0.7–2 cm, ovate or lanceolate; the upper ones grading into the bracts.
Petals 2-lobed ± to base, upper lobe 8–10 mm long, erect; lower lobe 10–15 mm long, curving forwards and up, both lobes narrowly linear, less than 1 mm wide.
Dorsal sepal erect, 10–11 × 2.5–4.5 mm, convex, acute; lateral sepals deflexed, c. 12 × 6 cm, obliquely obovate, not rolled lengthwise.
Slender terrestrial herb 15–45 cm tall; tubers to 2.5 × 1.5 cm, ellipsoid or ovoid.
Inflorescence to 11 cm long, laxly 1–7-flowered; bracts usually slightly shorter.
Anther erect, c. 4 mm high; canals 7–8 mm long, porrect, the tips upcurved.
Stigmas 5.5–8 mm long, projecting forwards, enlarged and truncate at apex.
Rostellum mid-lobe 2.5–4 mm high, triangular-linear, acute.
Flowers sweetly scented, white with green veined sepals.
Pedicel and ovary 15–25 mm long.
Stem leafy.
