N. Viet Nam. Ha Giang Province, Quang Ba District, Bat dai Son. Primary forest on limestone with Biota sp., Fraxinus, Quercus, Pseudotsuga, Acer and Taxus dominants along ridge and below peak at elev. 1100-1200 m (about 23°07′N 105°02′E). Epiphyte on top of ridge. Stem bracts brown-red, scaly, outer tepals pale yellow orange, steaked in red-purple, labellum dull yellow, rostellum white. Occasionally abundant. DKH 5126 5 April 2000