Synonyms: Calcitrapa fusca; Calcitrapa lutea; Calcitrapa sicula; Calcitrapa solstitialis (homotypic); Centaurea cyanifolia; Centaurea lappacea; Centaurea lutea; Centaurea multiflora; Centaurea parvispina (homotypic); Centaurea pottii; Centaurea pseudosolstitialis; Centaurea scabra; Centaurea sicula (heterotypic); Colymbada sicula (homotypic); Cyanus solstitialis (homotypic); Leucantha cyanifolia; Leucantha solstitialis (homotypic); Seridia sicula; Seridia solstitialis; Setachna solstitialis (homotypic); Solstitiaria flava; Solstitiaria solstitialis (homotypic); Triplocentron solstitiale (homotypic)