Synonyms: Calcitrapa calcitrapa; Calcitrapa hippophaestrum; Calcitrapa hybrida; Calcitrapa hypophaestum; Calcitrapa myacantha; Calcitrapa stellaris; Calcitrapa stellata; Calcitrapa vulgaris; Centaurea adulterina (homotypic); Centaurea calcitrapa horrida (heterotypic); Centaurea calcitrapa var. brevispina; Centaurea calcitrapa var. myacantha; Centaurea calcitrapoides (heterotypic); Centaurea carduifolia; Centaurea devauxii (homotypic); Centaurea horrida (heterotypic); Centaurea hybrida (heterotypic); Centaurea myacantha; Centaurea pouzini; Centaurea trichacantha (homotypic); Hieracium officinale; Hippophaestum vulgare; Rhaponticum calcitrapa (homotypic); Setachna calcitrapa