Orchidaceae

N.Vietnam, Ha Giang Prov., Quan Ba Distr., Can Ti Mun., vic. of Sing Xuoi Ho village, 23°04”N, 104°59”E, 26.2 km to 2° of Ha Giang city, 1100-1150 m. Primary closed evergreen mixed wet mossy forest with Xanthocyparis, Taxus, Nageia and Pseudotsuga along tops of karst remnant limestone ridge. Epiphyte. Rare.

Flowers (under cultivation) odorless; sepals and lateral petals yellow-brown, warty outside, brown-chocolate inside; lip white, light brown-yellowish at the base; midlobe deep purple-violet, striped with white; side lobes white, yellow at the base, with violet tint at the apex; column light violet; anther cup white, pollinia brightly yellow, scape and flower bracts dull green mottled with dirty purple, pedicel and ovary green flushed with purple. 12 X 1999, N.T. Hiep, L. Averyanov, P. Cribb et al., NTH 3590/a.