Centaurea

Centaurea bigerrensis

Centaurea bilbilitana

Centaurea bingoelensis

Centaurea bolivaris

Centaurea × bollui

Centaurea borbasii

Centaurea bordzilowski

Centaurea × borsodensis

Centaurea × borzae

Centaurea bouchonii

Centaurea × bourlieri

Centaurea × brandzae

Centaurea × brasoviana

Centaurea × brassoiana

Centaurea brevis

Centaurea cespitosus

Centaurea × charrieri

Centaurea bridgesii

Centaurea × brixinensis

Centaurea iberica

Iberian knapweed