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). Frequent lithophyte. Inflorescence pendant, pedicels pink, tepals white-cream, lip white at tip, yellow then yellow with red streaks laterally, rostellum white then yellow with red at base. DKH 5136 5 April 2000