Cirsium horridulum (Torr. & A.Gray) Fernald Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Cirsium species Cirsium horridulum Name Homonyms Cirsium horridulum Michx. Cirsium horridulum (Torr. & A.Gray) Fernald