Terrestrial, slender herb, with subterranean, moniliformous rhizomes, 0.14-0.35 m high. Leaves 350 x 7-8 mm, just emerging to partly developed at anthesis. Inflorescence lax, 5-15-flowered. Flowers with sepals yellow to greenish yellow tinged reddish brown to chocolate outside, paler inside, petals and lip bright yellow, side lobes veined bluish. Sepals: median sepal 9-16 mm long, oblong, apiculate; lateral sepals similar. Petals spreading, subequal, united with gynostemium, rarely distorted. Lip 3-lobed, base united with gynostemium, crests with 3-7 low, dentate, erose ridges; mentum 1-2 mm long, attached to lip apex; spur prominent, 4-7 mm long, reddish. Gynostemium 4-7 mm long. Flowering time Aug.-Nov.
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