marsh fern

American  

noun

1. a fern, Thelypteris palustris, having pinnatifid fronds and growing in wet places.

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marsh fern British  

noun

1. a fern of marshy woodlands, Thelypteris palustris, having pale green pinnate leaves and an underground rootstock

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Etymology

Origin of marsh fern

First recorded in 1855–60

Example Sentences

Thin, green marsh fern circled lakes alongside moonwort, rattlesnake fern and horsetail.

From New York Times

Wicken Fen is home to many rare plant species, including the marsh pea, the marsh fern, the milk parsley and the whorled water milfoil, as well as a number of different orchids.

From BBC

Seeding of the geotextile bags has now encouraged the growth of nationally scarce marsh fern and milk parsley.

From BBC

The fronds of the marsh fern are apt to be sterile in deep shade.

From Project Gutenberg

Resembles the marsh fern, of which it was once thought to be a variety.

From Project Gutenberg