Centaurea nigra subsp. gueryi (Maire) Maire in Jahandiez & Maire, Cat. Pl. Maroc: 806. 1934
Centaurea nigra subsp. gueryi in Jahandiez & Maire, Cat. Pl. Maroc: 806. 1934
is new combination for Centaurea gueryi in Bull. Soc. Hist. Nat. Afrique N. 15: 400. 1924
Centaurea nigra subsp. gueryi in Jahandiez & Maire, Cat. Pl. Maroc: 806. 1934