- Thelypteris, genus Thelypteris - marsh ferns: in some classification systems considered part of genus Dryopteris in family Dryopteridaceae
--1 is a kind of fern genus
--1 is a member of Thelypteridaceae, family Thelypteridaceae
--1 has members: marsh fern, Thelypteris palustris, Dryopteris thelypteris