1) Fern genus 2) Genus gymnocarpium 
Gymnocarpium is a small genus of ferns once placed with various other groups, including the dryopteroid ferns and the athyrioid ferns. Cladistic analysis has demonstrated that Gymnocarpium and Cystopteris form a natural but relatively primitive clade that is basal to the asplenoid, thelypterioid, and athyrioid ferns comprehensively. Gymnocarpium s...
[n] - oak ferns: in some classification systems included in genus Thelypteris