? rigidum Hoffm. Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Plantae phylum Tracheophyta class Polypodiopsida order Polypodiales family Dryopteridaceae genus Dryopteris species Dryopteris villarii Name Homonyms ? rigidum Spath, 1933 ? rigidum Pia, 1914 ? rigidum Hoffm.