SHIELD FERN

also called wood fern any member of the fern genus Dryopteris, in the family Aspleniaceae. The genus has about 150 species with worldwide distribution, and it is placed in the family Aspidiaceae in some classification systems. 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.