Luang Prabang prov., Ngoy distr., Nong Khiew village, Ta Nang Non Mountain around point 20°33′29.2″N 102°36′54.5″E.
Secondary semideciduous and evergreen dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-650 m a.s.l.
Terrestrial herb to 1 m tall in shady place of rocky mountain slope. Flowers white with greenish tint. Common.