S. Vietnam, Dak Lac Prov., Buon Don Distr. (approximately 12°53′N, 107°48′E). Open dry semideciduous Dipterocarp forest at elev. 100-150 m. Shrub 0.5 m hg. Flowers yellow, calyx green. Very common. Dominant of shrublet forest stratum.
VH 5829 30.04.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)