Laos, Khammoune prov., Boualapha distr., Vang Maner village, Palai mountain area, around point 17°30′13.6″N, 105°49′23.9″E, 520 m a.s.l.
Primary dry evergreen and semideciduous broad-leaved forest on sandy alluvial terrace and slopes of river valley between karstic limestone hills at 180-220 m a.s.l.
Prostrate herb on open sandy deposits along river, commonly in wet places. Locally common.
8 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, Littideth Xaiyavongsa, Siphanom Keovankham, AL 818.