Lai Chau Prov., Tam Duong Distr., Ho Thau Community, Ho Thau village, around point 22°22′19″N 103°36′14″E.
Secondary and primary evergreen closed forest on very steep mountain slopes composed with granite and quartzite at elevation from 1500 to 2000 m a.s.l.
Terrestrial herb on very steep shady rocky mountain slope. Flowers white. Common.
HAL 10264 30 Nov. 2006 Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.