Laos, Khammoune prov., Boualapa distr., Langkhang village, steep southern slopes of sandstone ridge allied to the road from the north between points 17°34′02.2″N 105°42′42.6″E, 200 m and 17°34′51.1″N 105°43′01.2″E, 535 m a.s.l.
Primary lowland semideciduous and evergreen dry forest on very steep rocky slopes.
Semideciduous tree 25-30 m tall. Flowers dull-yellow, inside with dirty-violet tint. Occasional.
15 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, AL 1084.