Dryopteris

(redirected from shield fern)
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Related to shield fern: cinnamon fern, Christmas fern, ostrich fern

Dryopteris

a genus of the fern family Aspleniaceae; rhizomes contain a toxin thought to be a thiaminase and which causes somnolence, stumbling gait and blindness due to encephalopathy in sheep and cattle. Includes D. borreri, D. filix-mas. Called also male fern.
References in periodicals archive ?
setiferum, a clump-former also known as soft shield fern, which has lowarching, lance-shaped fronds which look like octopus tentacles divided into tiny, oval, toothed leaves.
Select evergreen varieties such as hart's tongue fern (pictured), male fern and soft shield fern that will cope with dim light and dry soil.
Morton, Widespread Maiden Fern; Southern Shield Fern.