Polypodium castaneum Maxon Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Polypodiopsida order Polypodiales family Polypodiaceae genus Polypodium species Polypodium castaneum Name Homonyms Polypodium castaneum Maxon ex Tejero Polypodium castaneum Maxon