N. Vietnam, prov. Ha Giang, distr. Yen Minh, municipality Du Gia, E slopes of Phu Tha Ca mountain system at 1500-1600 m elev. (N 23°56′ E 105°13′). Primary evergreen broadleaved very wet mountain forest on shale very steep slopes. Terrestrial fern in shady place. Not rare.
CBL 2116 03 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)