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Terrestrial, stout herb, with subterranean moniliformous rhizomes, 0.30-0.85 m high. Leaves thin, plicate, inner 600 x 55 mm, outer shorter, mature at anthesis. Inflorescence dense becoming lax, 6-18-flowered. Flowers with sepals pale purplish brown outside, petals pale straw-yellow with purple basis, lip pale yellow with maroon basis. Sepals spreading; median sepal 27-31 mm long, narrowly oblong, acute; lateral sepals similar. Petals ± as long as median sepal, elliptic, obtuse. Lip shorter than petals, crests with 2-7 laterally subconfluent ridges terminating in short tooth; mentum vestigial up to 1 mm long; spur cylindrical, 5-6 mm long. Gynostemium 5-6 mm long. Flowering time Dec.-Feb.
Terrestrial herb, up to 0.85 m high. Flower scarcely resupinate at anthesis. Crests confined to basal two-fifths of lip, of low ridges, lacking papillae. Flowers with petals and lip mostly pale straw-yellow, but basal third of lip dark maroon.
