Carduus virginianus Bosc Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Cirsium species Cirsium nuttalii Name Homonyms Carduus virginianus Bosc ex DC. Carduus virginianus L. Carduus virginianus Walter Carduus virginianus Bosc