Hymenophjyllaceae Hymenophyllum exsertum Wall. S. Vietnam, Prov. Kontum. NW slopes of Ngoc Linh mountain system. Evergreen primary close forest at 2200 m alt. in deep wet places. Epiphyte. VH 513 06.03.1995 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5094-93)
Participants: L. Averyanov, N.T. Ban, N. Q. Binh, A. Budantzev, L. Budantzev, N.T. Hiep, D.D. Huyen, P.K. Loc, N.X. Tam, G. Yakovlev