Cirsium pumilum f. candidum Boivin Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Cirsium species Cirsium pumilum Name Homonyms Cirsium pumilum f. candidum Fernald Cirsium pumilum f. candidum Boivin