Carduus defloratus subsp. crassifolius (Willd.) Hayek, Fl. Steiermark 2(1): 596. 1913
Carduus defloratus subsp. crassifolius, Fl. Steiermark 2(1): 596. 1913
is new combination for Carduus crassifolius, Enum. Pl.: 838. 1809
Carduus defloratus subsp. crassifolius, Fl. Steiermark 2(1): 596. 1913