Acrostichum firmum Mett. ex Kuhn Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Polypodiopsida order Polypodiales family Dryopteridaceae genus Elaphoglossum species Elaphoglossum hoffmannii Name Homonyms Acrostichum firmum Mett. ex Kuhn Acrostichum firmum Mett.