- Gymnocarpium, genus Gymnocarpium - oak ferns: in some classification systems included in genus Thelypteris
--1 is a kind of fern genus
--1 is a member of
--1 has members: oak fern, Gymnocarpium dryopteris, Thelypteris dryopterisDryopteridaceae, family Dryopteridaceae, Athyriaceae, family Athyriaceae