The fungus P. plantaginis can reproduce both asexually (left) or sexually (right). Throughout the growing season P. plantaginis infects its host by asexually reproducing genetically identical clonal spores (represented by a dashed line). As the growing season of the host plant comes to an end, P. plantaginis produces a fruiting body known as chasmothecia, which contains resting spores that can survive the winter: these can either be reproduced asexually via process known as haploid selfing (left) or sexually via mating (right). When the next growing season starts, parasites can re-emerge from these resting spores and infect the host.
Image credit: Lore Bulteel (CC BY 4.0).