Polystichum pseudoxiphophyllum Ching Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Polypodiopsida order Polypodiales family Dryopteridaceae genus Polystichum species Polystichum xiphophyllum Name Homonyms Polystichum pseudoxiphophyllum Ching ex H.S.Kung Polystichum pseudoxiphophyllum Ching