- marsh fern, Thelypteris palustris, Dryopteris thelypteris - fern having pinnatifid fronds and growing in wet places; cosmopolitan in north temperate regions
--1 is a kind of fern
--1 is a member of Thelypteris, genus Thelypteris
--1 has particulars:snuffbox fern, meadow fern, Thelypteris palustris pubescens, Dryopteris thelypteris pubescens