S. Vietnam, Dak Lac Prov., Krong Bong Distr., Cu Pui Municipality, elevation from Dak Tour village (12°30′N, 108°30′E) to main peak of Chu Yang Sinh mt system (12°24′N, 108°26′E) along Dak Tour river (N slope). Primary wet closed mountain broad-leaved and mixed forest on granites along very steep shady slopes of river canyon at elev. 1500-1700 m. Lithophyte on wet shady waterfall mossy cliffs along river canyon. Tepals green, lip deep violet. Not common.
VH 6046 11.05.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)