Cirsium polycephalum DC., Prodr. 6: 639. 1838
Cirsium polycephalum, Prodr. 6: 639. 1838
is replaced synonym for Cirsium byzantinum, Nomencl. Bot., ed. 2, 1: 367. 1840
non Cirsium polycephalum, Syst. Veg. 3: 371. 1826
Cirsium polycephalum, Prodr. 6: 639. 1838