Thelypteris palustris is accepted species in  the family Aspleniaceae   
Genus Thelypteris 
This species is found in Alabama, Albania, Algeria, Altay, Arkansas, Austria, Baltic States, Belarus, Belgium, Bulgaria, Buryatiya, Central European Rus, China North-Central, China South-Central, China Southeast, Connecticut, Corse, Cuba, Czechoslovakia, Delaware, Denmark, District of Columbia, East European Russia, Finland, Florida, France, Georgia, Germany, Great Britain, Greece, Hungary, Illinois, Indiana, Inner Mongolia, Iowa, Iran, Iraq, Ireland, Irkutsk, Italy, Japan, Kansas, Kazakhstan, Kentucky, Korea, Krasnoyarsk, Krym, Louisiana, Maine, Manchuria, Manitoba, Maryland, Massachusetts, Mexico Central, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Morocco, Nebraska, Netherlands, New Brunswick, New Hampshire, New Jersey, New York, Newfoundland, North Carolina, North Caucasus, North Dakota, North European Russi, Northwest European R, Norway, Nova Scotia, Ohio, Oklahoma, Ontario, Palestine, Pennsylvania, Poland, Portugal, Prince Edward I., Québec, Rhode I., Romania, Saskatchewan, South Carolina, South Dakota, South European Russi, Spain, Sweden, Switzerland, Tennessee, Texas, Transcaucasus, Turkey, Turkey-in-Europe, Ukraine, Vermont, Virginia, West Himalaya, West Siberia, West Virginia, Wisconsin, Xinjiang, Yugoslavia.