Centaurea guilhelmi Maire in Bull. Soc. Hist. Nat. Afrique N. 26: 215. 1935
Centaurea guilhelmi in Bull. Soc. Hist. Nat. Afrique N. 26: 215. 1935
is basionym for Centaurea paniculata subsp. guilhelmi in Mém. Mus. Natl. Hist. Nat., Sér. B, Bot. 1(2): 196. 1951
Centaurea guilhelmi in Bull. Soc. Hist. Nat. Afrique N. 26: 215. 1935