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Plants slender, 200-350 mm; basal leaves 2, adpressed to the ground, elliptic to orbicular, silvery-green with dark veining, 25-75 x 20-65 mm, cauline leaves 5-8, lanceolate, acuminate, to 20 mm long. Inflorescences lax, few-to many-flowered; bracts lanceolate, acuminate, 5-11 mm long; pedicel with ovary straight or curved near the tip, pedicel c. 5 mm long, ovary slender, 15-20 mm long. Flowers greenish-white with white petals and spur. Median sepal concave, broadly 220 mm, cauline leaves 4-8, lanceolate, acumiªnate, to 50 mm long. Inflorescences lax, many-flowered; bracts lanceolate, acuminate, 10-35 mm long; pedicel with ovary straight, pedicel 10-20 mm long, ovary 20-35 mm long. Flowers white with green stigmas, spreading. Median sepal conªcave, elliptic-ovate, acuminate, 11.5-16 mm long; lateral sepals semi-ovate, acuminate, 13-17.5 mm long. Petals bipartite nearly to the base; upper lobe erect, linear, curved, 11.5-15 mm long; lower lobe spreading, filiform, 30-45 mm long. Lip triªpartite from near the base, spreading, lobes linear or nearly filiform; midlobe 15-20 mm long; side lobes 30-50 mm long; spur tapering acute, with a conspicuous longitudinal flap 0.5 mm tall in the mouth, 85-215 mm long. Anther 6-10 mm tall, canals upcurved and 3.5-5 mm long; stigmatic processes porrect, clavate, 5.5-10 mm long; cenªtral rostellum lobe subulate, shorter than the anªther, 4-6 mm long.
Basal leaves appressed to the ground, the larger 4.5–7.5 × 5.5–7 cm, ovate to ± orbicular, acute or apiculate, cordate at base, silvery-green with dark green reticulate veining, occasionally dark green; bract-like stem leaves up to 2 cm long.
Lip 3-lobed with a basal undivided part 2–3 mm long; mid-lobe decurved, 6–8 × 1 mm, linear; side lobes 20–27 mm long, filiform, similar to anterior petal lobes; spur 2–3.5 cm long, slightly inflated at apex, somewhat incurved.
Terrestrial herb, up to 200 mm tall. Inflorescence lax, flowers few. Spur 20-30 mm long. Posterior petal lobe ovate-oblong, rounded. Lip 3-lobed, ± 23 mm long, with side lobes shorter than midlobe. Flowers pale green.
Petals 2-lobed to 3–4 mm from base; posterior lobe erect, 3–4 × c. 2 mm, ovate, rounded, papillose; anterior lobe 17–27 mm long, filiform, the base c. 0.5 mm wide, deflexed or spreading and curving up.
Dorsal sepal erect, 5–6.5 × 4–5 mm, ovate, convex; lateral sepals reflexed, 5–7 × 2–3 mm, obliquely semi-elliptic.
Rostellum projecting in front of anther, 3-lobed at apex, the mid-lobe longer than the side lobes.
Slender terrestrial herb 20–35 cm tall; tubers 1–2.5 × 1–2 cm, ellipsoid or ± globose, tomentose.
Stem erect, with 2 basal leaves and 5–8 bract-like stem leaves scattered along its length.
Inflorescence 6–13 cm long, c. 5 cm in diameter, laxly 3–12-flowered; bracts 8–10 mm long.
Anther c. 3 mm high, erect, apiculate; canals c. 4 mm long.
Stigmas 2–3 mm long, club-shaped, lying along base of lip.
Ovary and pedicel arched, 20–25 mm long.
Flowers white or pale green.
