Pileolaria (fungus)

Pileolaria
Pileolaria brevipes on poison ivy
Scientific classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Pucciniomycetes
Order: Pucciniales
Family: Pileolariaceae
Genus: Pileolaria
Castagne

Pileolaria is a genus of autoecious rust fungi. They are considered plant pathogens and preferentially infect members of the sumac family.