fern - any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores

genus Thelypteris, Thelypteris - marsh ferns: in some classification systems considered part of genus Dryopteris in family Dryopteridaceae

Dryopteris thelypteris pubescens, meadow fern, snuffbox fern, Thelypteris palustris pubescens - fern of northeastern North America