Alsophila contaminans subsp. densa Christ Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Tracheophyta class Polypodiopsida order Cyatheales family Cyatheaceae genus Sphaeropteris species Sphaeropteris glauca Name Homonyms Alsophila contaminans var. densa Christ Alsophila contaminans subsp. densa Christ