Soil microfungi in homogeneous areas of three plant communities of North Italy.—The soil microfungi associated with three different community types in Prealpine region of North Italy were investigated. Frequency values for the taxonomic entities isolated were calculated, based on occurrence at sampling sites, in each community. Most of the entities were quantitatively rare. The microfungal communities associated withAcer pseudoplatanusandFraxinus excelsior, withOstrya carpinifoliaand withFagus sylvaticaappeared to be a distinctive group, even if many of them contained a substantial number of species wich are common with other vegetation types.