Erect, decumbent or scandent terrestrial herbs, 260-1258 mm tall; tubers 1-12, spreading, elongate-oblong, tomentose. Stem robust, 255-1250 x 3.5-11.0 mm. Leaves 6-21, lax to dense, cauline, lower sheathing, blades reduced, oblong-lanceolate to oblong-ovate, acute to acuminate, margins entire, smooth to undulate, 42-190 x 10-53 mm. Inflorescence cylindrical, 38-339 x 79-181 mm, lax to dense, 4-44-flowered; bracts similar to upper leaves, sheathing, ovate-lanceolate to ovate-oblong, acuminate to apiculate, 19.5-50.5 x 6.0-14.5 mm. Flowers spreading, green and white, pedicel and ovary sub-erect, 26.5-60.5 mm long. Dorsal sepal green, sub-erect to erect, elliptical to oblong-ovate, galeate, acute to acuminate, 14-23 x 5.0-8.5 mm; lateral sepals green, patent, strongly deflexed, oblong-lanceolate to ovate, acute to apiculate, base oblique, margins weakly to strongly revolute with acute tooth on lower margin, 13-26 x 5-10 mm, adnate to lip and stigmatic processes for 4.5-9.5 mm. Petals upper lobe green, erect, narrowly-falcate, acute to acuminate, 13-24 x 1.0-3.5 mm, adnate to dorsal sepal, lower lobe white with green tip, projecting forwards, ascending, weakly divergent, linear-falcate, tip curved, acuminate to apiculate, (18-)24-43 x 0.5-2.0 mm, adnate to claw of lip for 2.5-6.5 mm. Lip claw 6.0-14.0 mm, median lobe green, descending, geniculate, sometimes apically recurved, linear-lanceolate to narrowly-oblong, acute to acuminate, 15.0-33.5 x 1.0-3.5 mm, lateral lobes white with green tips, projecting forward, ascending, diverging, linear-falcate, tips curved, acuminate, 17.5-44.5 x 0.5-2.0 mm; spur toothed, 27-44 (-58) mm long, clavate apex 8.0-15.0(-18.5) mm long. Anther erect, acute, 4.5-7.5 mm long, canals slender, 10-14 mm long. Stigmatic' processes clavate to spathulate, projecting forwards and deflexed, sub-parallel, (11.0-)15.021.5 mm long, base adnate to lip. Rostellum 3-lobed, base auriculate, median lobe cucullate, acute to acuminate, margin ciliate, 7.5-11.5 mm long, lateral lobes linear, fused to anther canals, slightly deflexed to sub-erect 45°, sub-parallel, 2.0-5.5 mm long.
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Herb, up to 1 m high; robust, leafy. Leaves cauline, oblong to broadly lanceolate. Flowers: upper petal lobe 15-25 mm long; lower petal lobe narrowly linear throughout, slightly curved; perianth green and white; Mar., Apr.
Robust, leafy herb, up to 1 m high. Leaves flat, with 1 central vein. Upper petal lobe 15-25 mm long. Lower petal lobe narrowly linear throughout, slightly curved. Flowers green and white.
Lip 38–45 mm long over all, joined to the stigmatic arms for c. 8 mm at base. Mid-lobe 24–35 mm long; side lobes 18–30 mm long, all lobes filiform.
Dorsal sepal 16–18 × 12–13 mm, ovate, acute, very convex; lateral sepals 18–24 mm long, obliquely ovate, rolled lengthways.
Stem leafy, the lowest 2 ± sheathing, the remainder 7.5–9.5 × 2–3 cm, ovate, acute, usually ± withered by flowering time.
Petals 2-lobed, both lobes narrowly linear; upper lobe 16–18 mm long, lower lobe 20–25 mm long.
Robust terrestrial herb 45–70 cm tall; tubers cylindrical, villous.
Stigmatic arms 15–20 mm long; anther canals 8 mm long.
Spur 3–5 cm long, slender, swollen at apex.
Bracts 3–3.5 × 1 cm, ovate, acuminate.
Inflorescence densely many-flowered.
Pedicel and ovary 3.5–5.5 cm long.
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