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genus Betagenus Bettongia
genus Betula
genus Bibos
genus Bidens
genus Bignonia
genus Biscutella
genus Bison
genus Bitis
genus Blaberus
genus Blandfordia
genus Blarina
genus Blastocladia
genus Blastomyces
genus Blatta
genus Blattella
-- genus Blechnum --
genus Blennius
genus Blephilia
genus Bletia
genus Bletilla
genus Blighia
genus Blissus
genus Bloomeria
genus Bocconia
genus Boehmeria
genus Bolbitis
genus Boletellus
genus Boletus
genus Boltonia
genus Bomarea
genus Bombax
genus Bombina
genus Blechnum
| Noun | 1. |  genus Blechnum - in some classification systems placed in family Polypodiaceae; terrestrial ferns of cosmopolitan distribution mainly in southern hemisphere: hard fernsSynonyms: Blechnum |