ABSTRACTTeliospore morphology, teliospore germination and cytology between a bunt fromPoa reflexaandTilletia fuscafrom bromes and fescues are compared, and those of theP. reflexabunt are distinct fromT. fusca.The bunt fromP. reflexais separated fromT. fuscaand described as a new species (T. togwatii), withTilletia fuscaredefined. Spore germination and cytological data are discussed as supplemental criteria in the taxonomy of the bunt fungi.