Vientiane prov., Kasi distr., between Pa Chao and Nam Ken villages, Pa Chao Mt., around point 19°19′35.5′'N 102°22′57.7′'E.
Secondary broad-leaved evergreen dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1100-1200 m a.s.l.
Terrestrial and lithophytic tuberiferous herb on rather open steep rocky slope. Occasional.