B4-X '^^ >1, pp. 703-732 24 January 1977 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON NOMENCLATURAL AND TAXONOMIC NOTES ON THE PTERIDOPHYTES OF COSTA RICA, PANAMA, AND COLOMBIA, I. By David B. Lellinger Smithsonian Institution, Washington, D.C. 20560 The purpose of this paper and the one which will follow it is to publish lectotypes, new combinations, and new species of pteridophytes that will be included in my forthcoming "Ferns and Fern-allies of Costa Rica, Panama, and the Choco." Throughout this paper in the citation of type specimens, the word "photo" followed by a number refers to the numbered series of photographs taken by C. V. Morton and distributed from the U.S. National Museum. Photographs by others are identified by the name (and number, if any) of the person or institution who took them. The papers also include some new combinations and new species necessary for the correct naming of specimens that de la Sota and I collected in Colombia outside the Choco region, and which may be based on types collected in countries other than Colombia. The principal entries are in alphabetical order for easy reference. In those cases where the principal entries are taxo-nomic or nomenclatural synonyms, the disposition of these names is given as I vuiderstand it at present. Adiantum deflectens var. tremulum Hieron. Bot. Jahrb. Engler 34:487. 1904. Lectotijpc: To fix the application of this name, 1 choose from among tlie syntypes cited by Hieronymus: Near Colonia Tovar, Edo. Aragua, Venezuela, Fendler 81 ( US ) . Discussion: This variety intergrades with var. deflectens Mart., and does not seem worthy of distinction. It is characterized by having lobed 61— Proc. Biol. Soc. Wash., Vol. 89, 1977 (703)
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