Xiangkhouang Prov., Kham Distr., Huad village, Phou tat Vinh mt., around point 19°33'02.2'N 103°39'56.3'E.
Secondary broad-leaved evergreen dry forest on alluvial valley and on foothills of limestone remnant mountains at elev. 700-750 m a.s.l. Caulifloric tree 10-12 m tall in shady place. Flowers dark dirty purplish. Not common.