| molecular phylogeny supports a northern hemisphere origin of golovinomyces (ascomycota: erysiphales). | golovinomyces is a strictly herb-parasitic genus in the erysiphaceae. host-parasite co-speciation was reported recently between the genus golovinomyces and asteraceae from molecular phylogenetic analyses. the asteraceae originated in south america and latterly expanded their geographic distribution into the northern hemisphere. if the co-speciation between golovinomyces and asteraceae originated in south america, the geographic origin of golovinomyces could be assumed to be south america. to add ... | 2006 | 16949808 |