N. Vietnam, prov. Ha Giang, distr. Yen Minh, municipality Du Gia, E slopes of Phu Tha Ca mountain system at 1900-2000 m elev. (N 23°56′ E 105°13′). Primary evergreen broadleaved very wet mossy cloud forest on quartzite very steep slopes. Terrestrial and lithophyte herb on shady quartzite cliff. Flowers pink-lilac. Leaves below velvety deep green, below light green. Very common. Codominanthe of herb lithophyte communities at 1900-2000 m elev.
CBL 2087 03 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)