Albugo tragopogonis is associated with leaf spots, petiole greying and grey stem spot of sunflower. With this study, the fungus is also associated with heads of sunflower. In addition to oospores of A. tragopogonis that formed on involucral bracts and the base of receptacles, sexual structures were also produced at the base of floral disks. In these instances, aospores were observed in disk bracts, receptacles and in the pericarp of seeds, but not in disk flowers and pappuses. These infections appeared to take place in the absence of stromata, The incidence of seed transmission of A. tragopogonis is expected to be low.