Laos, Khammoune prov., Boualapha distr., Nong Seng village, Vang Phae Lay mountain, around point 17°31′02.7″N, 105°47′17.2″E.
Primary dry evergreen and semideciduous broad-leaved forest on very steep rocky slope near karstic hill top composed with solid, marble-like highly eroded limestone at 300-530 m a.s.l.
Treelet 4-6 m tall o among open rocks on mountain top. Flowers yellow. Occasional.
11 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, Littideth Xaiyavongsa, Siphanom Keovankham, AL 935.