Cnicus acaulos (L.) Willd., Fl. Berol. Prodr.: 260. 1787
Cnicus acaulos, Fl. Berol. Prodr.: 260. 1787
is new combination for Carduus acaulos, Sp. Pl.: 1199. 1753
has orthographic variant Cnicus acaule
Cnicus acaulos, Fl. Berol. Prodr.: 260. 1787
Taxon for this name