Cnicus arabicus Roth (original description)
Cnicus casabonae (L.) Roth accepted as Ptilostemon casabonae (L.) Greuter (original description)
Cnicus cyanoides Roth (original description)
Cnicus leucographus Roth (original description)
Cnicus monspessulanus (L.) Roth accepted as Cirsium monspessulanum (L.) Hill (original description)
Cnicus pycnocephalus Roth accepted as Carduus cephalanthus Viv. (original description)
Cnicus stellatus (L.) Roth accepted as Ptilostemon stellatus (L.) Greuter (original description)
Cnicus syriacus (L.) Roth accepted as Notobasis syriaca (L.) Cass. (original description)