Pyrrosia lingua var. P. heteracta (Kuhn) Hovekamp.
S. Vietnam, Prov. Lam Dong, 30 km to NE from Dalat city, distr. Lac Duong, municipalite Da Chay. Primary closed evergreen broadleaved forest on W macroslope of Bi Dup mt system at 1700-1900 m alt. (N 12° 08′, E 108° 39′). Epiphyte on high tree. Common. VH 3154 24.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)