S. Vietnam, Dak Lac Prov., Krong Bong Distr., Cu Pui Municipality, elevation from Dak Tour village (12°30′N, 108°30′E) along Dak Tour river on N macroslope of Chu Yang Sinh mt system. Secondary dry evergreen broad-leaved forest with remnants of primary elements along river slopes at elev. 450-550 m. Terrestrial and lithophytic shrublet on very steep shady river slope. Flower buds light pink. VH 5929 02.05.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)