Carduus glaber Buch.-Ham. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Tricholepis species Tricholepis radicans Name Homonyms Carduus glaber Nutt. Carduus glaber Buch.-Ham. ex Wall. Carduus glaber Steud. Carduus glaber Buch.-Ham.