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 ?
After the front yard and then the side yard--with large beds of azaleas, nandinas, spiraea, and hawthorn along with a tree-shaded bed that's filled with shield ferns for most of the year--were completed, it was time to address the rear area.
Voles had eaten the tender fiddleheads from the center of several established soft shield ferns.