Cirsium ×stonum Porta ex Huter, 1889 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Cirsium species Cirsium fabium Name Homonyms Cirsium ×stonum Porta ex Kern. Cirsium ×stonum Porta ex Huter, 1889 Cirsium ×stonum Porta