N. Vietnam, prov. Ha Giang, distr. Yen Minh, municipality Du Gia, E slopes of Phu Tha Ca mountain system at 1700-1800 m elev. (N 23°56′ E 105°13′). Primary evergreen broadleaved very wet mountain forest on quartzite very steep slopes. Lithophyte fern on mossy shady quartzite cliffs. Not rare.
CBL 2140 03 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)