Carduus echinocephalus (Willd.) Pers. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Ptilostemon species Ptilostemon echinocephalus Name Homonyms Carduus echinocephalus (Willd.) Pers. ex Steud. Carduus echinocephalus (Willd.) Pers.