N. Vietnam, prov. Ha Giang, distr. Yen Minh, municipality Du Gia, E slopes of Phu Tha Ca mountain system at 1300-1500 m elev. (N 23°56′ E 105°13′). Primary evergreen broadleaved very wet mountain forest on shale very steep slopes. Epiphyte fern in shady place. Common.
CBL 2039 03 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)