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shield fern

noun
1.
any of numerous ferns of the genera Dryopteris and Polystichum, having shield-shaped indusia.
Origin
1805-1815
1805-15
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for shield fern

shield fern

noun
1.
any temperate woodland fern of the genus Polystichum having shield-shaped flaps covering the spore-producing bodies: family Aspleniaceae
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for shield fern

any member of the fern genus Dryopteris, in the family Dryopteridaceae. The genus has about 250 species with worldwide distribution. Shield ferns are medium-sized woodland plants with bright green, leathery leaves that are several times divided. They have numerous round spore clusters (sori) attached along the veins on the underside of the leaves and protected by a tissue covering (indusium) that is reniform (kidney-shaped).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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10
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