wall fern


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Noun1.wall fern - mat-forming lithophytic or terrestrial fern with creeping rootstocks and large pinnatifid fronds found throughout North America and Europe and Africa and east Asiawall fern - mat-forming lithophytic or terrestrial fern with creeping rootstocks and large pinnatifid fronds found throughout North America and Europe and Africa and east Asia
polypody - any of numerous ferns of the genus Polypodium
References in periodicals archive ?
Wall ferns have been recorded in London since 1771, but they nearly disappeared as coal fumes neutralized the lime mortar they grow on.