Investigation on the content of azulene and the chromosome number of the taxa of the Achillea millefolium-complex

aceites esenciales achillea achillea millefolium alemania allemagne austria autriche chromosome number composition globale essential oils fitomejoramiento genetica genetics germany herkunft hongrie huile essentielle hungary hungria italia italie italy nombre chromosomique plant breeding poliploidia polyploidie polyploidy proximate composition taxonomia taxonomie taxonomy