N. Vietnam, prov. Ha Giang, distr. Yen Minh, municipality Du Gia, E slopes of Phu Tha Ca mountain system at 1950 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 up to 0.3 m hg. Common. Codominanthe of herb forest stratum at 1900-2000 m elev.
CBL 2153 03 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)