N. Vietnam, prov. Ha Giang, distr. Yen Minh, municipality Du Gia, E slopes of Phu Tha Ca mountain system at 1800-1900 m elev. (N 23°56′ E 105°13′). Primary evergreen broadleaved very wet mossy cloud forest on quartzite very steep slopes. Lithophyte herb on mossy shady vertical quartzite cliff. Flowers pinkish. Very common. Codominanthe of herb forest stratum at 1700-2000 m elev. CBL 2080 03 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)