N. Vietnam, prov. Ha Giang, distr. Yen Minh, municipality Lao Va Chai, vicinities of Ngan Chai village, 6 km to W of Yen Minh town (N 23°07′ E 105°08′). Primary evergreen wet mossy mixed forest (with domination of Tsuga chinensis and Pinus kwangtungensis) along tops of karst remnant limestone ridge at 1500-1600 m elev. Epiphyte and lithophyte fern at the base of old mossy trees in very shady wet place. Common.
CBL 1955 01 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)