| Plant tribe | Plant genus | Plant species | Part of plant | Region | Literature | Source |
| Carduoideae | Centaurea | jacea | Flowerhead | Switzerland | Merz (1994) | Breeding - Switzerland |
| nigra | Flowerhead | Merz (1994) | Breeding - not Switzerland | |||
| splendens | Flowerhead | Merz (1994) | Citation for foreign breed |