Phegopteris excelsior (Thelypteridaceae): A New Species of North American Tetraploid Beech Fern Author Patel, Nikisha R. Pringle Herbarium, Department of Plant Biology, 111 Jeffords Hall, University of Vermont, 63 Carrigan Drive, Burlington, Vermont 05405, U. S. A. Author Fawcett, Susan Pringle Herbarium, Department of Plant Biology, 111 Jeffords Hall, University of Vermont, 63 Carrigan Drive, Burlington, Vermont 05405, U. S. A. Author Gilman, Arthur V. text Novon, A Journal for Botanical Nomenclature 2019 2019-11-04 27 4 211 218 http://dx.doi.org/10.3417/2019409 journal article 10.3417/2019409 3ec27add-200f-4d9f-9fd3-a46ed282720a 4561918 Phegopteris excelsior . CANADA . Nova Scotia : Lower Blomidon , Cody 20242 ( MICH ) ; Kings Co. , Hersey & Newell s.n. ( GH ) . Quebec : Hatley, Churchill s.n. ( GH ) ; Gibraltar , Churchill s.n. ( GH ) ; Hatley , Knowlton s.n. ( GH ) ; St. Gregoire , Rouleau et al. s.n. ( GH ) ; Mt.Rougemont , Sherk & Cinq-Mars 437 ex cult #65374 ( MICH ) . U.S.A. Connecticut : Windsor , Clark s.n. (larger of two specimens on the sheet) ( NEBC ) . Maine : Mars Hill , Gilman 04104 ( VT ) ; Cooper , Gilman 06050 ( AVG ); Molunkus , Gilman 2K199 ( AVG ) ; Washington , Gilman 96087 ( AVG ) ; Bucksport, Gilman 97261 ( AVG ) ; Litchfield, Gilman 98018 ( AVG ); Strong, Seymour 24090 ( VT ) . New York : Delaware Co., B. D. Gilbert s.n. ( GH ) . Vermont : Cabot, Gilman 01142 ( AVG ) ; St. Johnsbury , Gilman 18021 ( holotype ) ( VT ) ; St. Johnsbury , Gilman 96061 ( AVG ) ; East Montpelier , Gilman 96118 ( AVG ) ; Waterford, Gilman 96248 ( AVG ) ; St. Johnsbury , Rooney s.n. ( VT ) ; Dorset, Terry s.n. ( VT ) .