N. Vietnam, prov. Ha Giang, distr. Yen Minh, municipality Du Gia, E slopes of Phu Tha Ca mountain system at 1100-1200 m elev. (N 23°56′ E 105°13′). Primary evergreen broadleaved very wet mountain forest on shale very steep slopes. Epiphyte in shady place. Not common.
CBL 2099 03 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)