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|Noun||1.||genus Blechnum - in some classification systems placed in family Polypodiaceae; terrestrial ferns of cosmopolitan distribution mainly in southern hemisphere: hard ferns|
fern genus - genera of ferns and fern allies
Blechnaceae, family Blechnaceae - one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; includes genera Blechnum, Doodia, Sadleria, Stenochlaena, and Woodwardia
hard fern - any of several ferns of the genus Blechnum