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(Plants) a fern of marshy woodlands, Thelypteris palustris, having pale green pinnate leaves and an underground rootstock
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|Noun||1.||marsh fern - fern having pinnatifid fronds and growing in wet places; cosmopolitan in north temperate regions|
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
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