S. Vietnam, Kontum Prov., Sa Thay Distr., Sa Son Municipality, Chu Mom Ray nature reserve (14ø25'N, 107ø44'E). Secondary open broad-leaved evergreen dry forest on granites at elev. 500-600 m. Epiphyte on high tree. Flowers light yellow, lip light yellow with orange keels, column at front with red spot. Not common.
No VH 5816 28 04.2000
International Botanical Expedition of the U.S.A. National Geographic