Cirsium casabonae subsp. casabonae Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Ptilostemon species Ptilostemon casabonae Name Homonyms Cirsium casabonae var. casabonae Cirsium casabonae subsp. casabonae