| bulgaria | | centaurea phrygia | species | 4 | 0 |
| bulgaria | | centaurea phrygia subsp. moesiaca | subspecies | 4 | 0 |
| bulgaria | | centaurea phrygia subsp. razgradensis | subspecies | 8 | 0 |
| germany | | centaurea phrygia subsp. pseudophrygia | subspecies | 4 | 0 |
| romania | | centaurea phrygia subsp. phrygia | subspecies | 4 | 0 |