Polypodiaceae s.l. Prosaptia stenobasis Bak. S. Vietnam, Prov. Kontum. Cloud evegreen primary forest on N slope of Ngoc Linh mountain system at 2380 m alt. Epiphyte. Not rare. VH 592 09.03.1995 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