Laos, Khammouane prov., Boualapha distr., Nong Seng village, southern sandstone slopes of Phou Chuang (Poujeuang) Mt. around point 17°33′14.4″N, 105°47′50.4″E.
Primary semideciduous and evergreen broad-leaved dry forest at elev. 350-450 m a.s.l.
Evergreen treelet 4-6 m tall on steep rocky slope. Flowers yellowish to almost white. Very common, main co-dominant of the second forest stratum at 200-400 m a.s.l.
6 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, Littideth Xaiyavongsa, Siphanom Keovankham, AL 734.