Polypodium thelypteris (Linnaeus) Linnaeus , Systema Vegetabilium , ed. 13 : 788. 1774 Acrostichum thelypteris L. (1753) Chapter 7: Linnaean Plant Names and their Types (part P) Jarvis, Charlie Schott Schott Polypodiopsida Thelypteridaceae Thelypteris Plantae Polypodiales Tracheophyta species palustris      Polypodium thelypteris(Linnaeus) Linnaeus,  Systema Vegetabilium, ed. 13: 788. 1774.  ["Habitat in Europae septentrionalis paludibus."] Sp. Pl. 2: 1071 (1753). RCN: 7897.  Basionym:  Acrostichum thelypterisL. (1753).  Type not designated.  Original material: as basionym.