Carduus onopordioides var. scardicus Griseb., Spic. Fl. Rumel. 1: 246. 1843
Carduus onopordioides var. scardicus, Spic. Fl. Rumel. 1: 246. 1843
is basionym for Carduus scardicus in Biblioth. Bot. 5: 70. 1893
is basionym for Carduus kerneri subsp. scardicus in Mitt. Bot. Staatssamml. München 5: 417. 1964
Carduus onopordioides var. scardicus, Spic. Fl. Rumel. 1: 246. 1843