Pyrrosia lingua var. P. heteracta (Kuhn) Hovekamp.
S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 32.5 km to NE from Dalat city (N 12° 07′, E 108° 41′). Closed primary broadleaved mt forest on NNW macroslope of Bi Dup mt system at 1800 m alt. Epiphyte on high trees. Not rare. VH 3316 28.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)