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Terrestrial, slender herb, with subterranean, moniliformous rhizomes, 0.15-0.60 m high. Leaves 100-420 x 2.6 mm, mature at anthesis. Inflorescence dense, 5-25-flowered. Flowers with sepals dark green to brownish purple, petals dull straw-yellow outside, pale brownish purple inside, lip greenish white, side lobes with rusty brown ridges, apical lobe rusty brown, median crest on lip bright cadmium-yellow. Sepals: median sepal 6-8 mm long, oblong, mucronate; lateral sepals similar. Petals spreading, subequal, rotund, as long as median sepal, obtuse to mucronate. Lip 3-lobed, crests with fleshy ridges and lamellae on the 3 central veins; mentum absent; spur stoutly cylindrical, 2-3 mm long. Gynostemium stout, 3-5 mm long. Flowering time Dec., Jan.
Rhizomatous geophyte to 60 cm. Leaves fully developed at anthesis, linear-lanceolate. Flowers few to many in a dense raceme, sepals dark green to purple, petals yellow and brown, lip brown, lip crest bright yellow, median sepal 6-8 mm long, lip crests of fleshy ridges and lamellae, spur stout, cylindrical, 2-3 mm long.
Terrestrial herb, up to 0.6 m high. Spike dense. Side lobes of lip subrhomboid, overlapping part of base of midlobe, with only apex slightly divergent. Flowers with sepals dark green to brownish purple, petals dull straw-yellow outside, pale purplish brown inside.
Lip c. 6.3 × 4.3 mm, with fleshy lamellae on the 3 central nerves, 3-lobed; mid-lobe c. 3 × 2.6 mm, truncate or emarginate; side lobes ± oblong; spur 2–3.5 mm, conical or cylindrical, blunt.
Sepals green, spotted with brown and dull purple; petals pale yellow outside, blotched with purple inside; lip yellowish-brown.
Flowering stem 18–30 cm, rather densely few-to several-flowered; scape with about 3 bracts c. 3 cm long.
Leaves 13–21 cm × 1–4 mm, narrowly linear, developed at flowering time.
Sepals 6.6–6.8 × 2–2.3 mm, oblong, apiculate, the laterals oblique.
Perennating organs subterranean, tuber-like, forming chains.
Petals c. 6.2 × 3.8 mm, ovate-oblong, apiculate.
Bracts 7–10 mm, lanceolate, acuminate.
Pedicel and ovary 7 mm long.
Column stout, 3–5 mm long.
Slender terrestrial herb.
