Lam Dong Province, Don Duong District, old secondary dry evergreen broad-leaved and mixed (with Pinus kesiya) submontane forest on shale at elevation 1000-1100 m a.s.l. along rocky stream. Terrestrial and lithophytic herb among open river rocks. Flowers red. Common. 26 October 2019, L. Averyanov, Nguyen Van Canh, T. Maisak, AL 1198.2.