The ascomycete Claviceps paspali is a biotrophic flower pathogen of Paspalum spp. genus. This fungus has become a serious problem threatening the forage potential of some susceptible species like P. dilatatum. Infections with this pathogen lead to the formation of a sclerotia instead of seed in the infected flower, drastically reducing the seed production of these plants almost to no commercial use. This study provide new insights that will provide a basis for a better understanding of this pathosystem.