Laos, Khammouane prov., Boualapha distr., Nong Seng village, southern sandstone slopes of Phou Chuang (Poujeuang) Mt. around point 17°34′13.3″N 105°47′57.5″E.
Primary evergreen broad-leaved dry forest at elev. 700-1000 m a.s.l.
Undershrub to 1.5 m tall in shady place. Flowers white. Very common.
3 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, Littideth Xaiyavongsa, Siphanom Keovankham, AL 522.