S. Vietnam, Kontum Prov., Sa Thay Distr., Sa Son Municipality, Chu Mom Ray nature reserve (14°25′N, 107°44′E). Primary wet broad-leaved closed evergreen mountain forest on granites at elev. 700-900 m. Terrestrial herb in very steep shady slope. Flowers white, central petal with two violet spots. Not rare.
VH 5801 28 04.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)