【Flora of China】FOC Vol.25 (2009)
Plants lithophytic or terrestrial. Leaves 5 or 6, distichous; blade abaxially usually without purple marks at base, adaxially uniformly dark green, lorate or linear, 23-44 × 1.4-2.2 cm, leathery.
Scape suberect or arching, usually terminating in a solitary flower; peduncle brown-purple, 13-24(-30) cm, densely long hairy. Flower 8-16 cm in diam.; dorsal sepal and synsepal dark brown, with yellowish or greenish margin; petals yellowish, with dense purple-brown speckles in basal half and purplish rose in apical half; lip yellowish to greenish, with dense brownish or purplish rose speckles; staminode dark brown with narrow yellowish margin and 2 large whitish spots and a yellowish blotch centrally.
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