Pithomyces chartarum(Berk. & Curt.) M. B. Ellis was isolated from bluegrass sod (Poa pratensisL.) in Illinois, Indiana, and Wisconsin during July and August 1986. This is the first report ofPithomyces chartarumin the north central United States and the first report of the fungus in bluegrass sod. The fungus appears to be a saprophyte on senescent bluegrass leaves; its interest as a possible mycotoxin producer is underlined.