Interestingly, based on experimental studies on Gymnosporangium, Helicogloea and Platygloea, Bauer and Oberwinkler [39 ] demonstrated that the basidial cells in phragmobasidia essentially represent meiospores and that the meiosporangial dispersal propagules accordingly represent secondary vegetative cells, comparable to the yeasts of Ustilago, or ballistosporic conidia of the rusts [40 ] (see also [41 ]).
Source: wiktionary