Centaurea holtzii Wagenitz in Notes Roy. Bot. Gard. Edinburgh 33: 226. 1974
Centaurea holtzii in Notes Roy. Bot. Gard. Edinburgh 33: 226. 1974
is basionym for Psephellus holtzii in Willdenowia 30: 34. 2000
Centaurea holtzii in Notes Roy. Bot. Gard. Edinburgh 33: 226. 1974