Centaurea jacea subsp. nigra (L.) Bonnier & Layens, Tabl. Syn. Pl. Vasc. France: 180. 1894
Centaurea jacea subsp. nigra, Tabl. Syn. Pl. Vasc. France: 180. 1894
is new combination for Centaurea nigra, Sp. Pl.: 911. 1753
has orthographic variant Centaurea iacea subsp. nigra
Centaurea jacea subsp. nigra, Tabl. Syn. Pl. Vasc. France: 180. 1894