Synonyms: Calcitrapa nudicaulis (homotypic); Carduus cerinthifolius; Carduus cerinthoides; Carduus glaucus (heterotypic); Carduus nudicaulis (homotypic); Centaurea dornacina; Centaurea nudicaulis (homotypic); Serratula albarracinensis; Serratula eliasii; Serratula glauca (heterotypic); Serratula heterophylla nudicaulis; Serratula nudicaulis (homotypic); Serratula nudicaulis demissa; Serratula nudicaulis nudicaulis; Serratula nudicaulis subinermis; Serratula nudicaulis var. albarracinensis; Serratula nudicaulis var. ibrahimi; Serratula nudicaulis var. nudicaulis; Serratula nudicaulis var. subinermis; Serratula nudicaulis var. transiens