Erect, decumbent or scandent terrestrial herbs, 85-560 mm tall; tubers 1-10, spreading, elongate-oblong, tomentose. Stem slender to robust, 80-550 x 1.5-6.5 mm. Leaves sometimes withered at flowering, 5-16, lax to dense, cauline, lower sheathing, blades reduced, lanceolate to narrowly-oblong, acute to acuminate, margins entire, smooth to undulate, 39-131 x 7-25 mm. Inflorescence cylindrical, 41-237 x 50-131 mm, lax to dense, 3-36-flowered; bracts sometimes withered at flowering, similar to upper leaves, sheathing, ovate-lanceolate to ovate-oblong, apiculate, 12-33 x 4.5-10.0 mm. Flowers spreading, green and white, pedicel and ovary sub-erect, 21.5-39.5 mm long. Dorsal sepal green, erect, elliptical-ovate, galeate, acute to acuminate, 8.5-15.0 x 3-5 mm; lateral sepals green, patent, slightly deflexed, widely oblong-ovate, acute to apiculate, base oblique, margins weakly to strongly revolute with acute tooth on lower margin, 8.0-14.5 x 4.5-8.5 mm, adnate to lip and stigmatic processes for 3.5-7.5 mm. Petals upper lobe green, erect, narrowly-falcate, acute to acuminate, 6.5-16.0 x 0.5-2.0 mm, adnate to dorsal sepal, lower lobe white with green tip, spreading horizontally, weakly deflexed, weakly to strongly falcate, linear, tip curved, acuminate, 12.5-24.5 x 0.5-1.5 mm, adnate to claw of lip for 2.0-5.5 mm. Lip green, claw 6-13 mm, median lobe descending, geniculate, sometimes apically recurved, linear-lanceolate to narrowly-oblong, acute to acuminate, 10.5-20.0 x 1.0-2.5 mm, lateral lobes descending, diverging, linear-falcate, tips curved, acuminate, 14-29 x 0.5-2.0 mm; spur toothed, 24-43 mm long, clavate apex 6.5-21.5 mm long. Anther erect, acute, 3.5-6.0 mm long, canals slender, 6-12 mm long. Stigmatic processes clavate to spathulafe, projecting forwards and deflexed, sub-parallel, 8.5-15.5 mm long, base adnate to lip. Rostellum 3-lobed, base auriculate, median lobe cucullate, acute to acuminate, margin ciliate, 2-5 mm long, lateral lobes linear, fused to anther canals, projecting forwards to sub-erect 20°, weakly divergent, 2.0-5.5 mm long.
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Terrestrial herb, fairly robust, geophyte, up to 0.7 m high; with oblong tuberous roots. Leaves cauline, narrowly oblong, up to 110 mm long, withered when flowering. Inflorescence a lax, elongated raceme; flowers many, white and green. Sepals unequal; median sepal erect, forming hood, 10-12 mm long; lateral sepals oblique and reflexed. Petals deeply 2-lobed, upper lobe linear, 10-12 mm long, lower (anterior) lobe narrowly linear, 15-20 mm long, curved towards apex. Lip 3-lobed, midlobe narrowly linear, shorter than side lobes, sharply bent in middle, side lobes 16-21 mm long, narrowly linear, attenuate, curved towards apex; spur 30-35 mm long, swollen towards apex. Flowering time June-Aug.
A fairly robust, leafy herb, up to 0.65 m high. Leaves withered at flowering time in midwinter, narrowly oblong, up to 110 mm long. Spur swollen towards apex, 30-35 mm long. Flowers green and white.
Lip 25 mm long, 3-lobed from a claw 9 mm long; mid-lobe up to 20 mm long, linear, bent back about the middle; side lobes up to 22 mm long, narrowly linear, slightly curled towards the apex.
Sepals 12 × 8–10 mm, the dorsal sepal erect, ovate, acute, very convex; lateral sepals obliquely semi-orbicular, apiculate.
Petals 2-lobed; upper lobe 1–1.2 cm long, adnate to dorsal sepal; lateral sepals up to 2.2 cm long; both lobes linear.
Inflorescence several-to many-flowered; ovary and pedicel 2.5–3 cm long; bracts up to 3 cm long, ovate, acuminate.
Stem erect, leafy; leaves up to c. 7 cm long, ± withered at flowering time.
A fairly robust plant 20–60 cm tall; tubers cylindrical, woolly.
Spur 3–3.5 cm long, slightly swollen towards the apex.
Stigmatic arms 10 mm long; anther canals 6 mm long.
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