N. Vietnam, prov. Ha Giang, distr. Yen Minh, municipality Du Gia, E slopes of Phu Tha Ca mountain system at 1400-1500 m elev. (N 23°56′ E 105°13′). Primary evergreen broadleaved very wet mountain forest on shale very steep slopes. Terrestrial and lithophyte herb. Very common. Codominanthe of herb forest stratum at 1200-1500 m elev.
CBL 2028 03 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)