Three new Fungi from North America

Among the Gloeosporium material received from the herbarium of the State College of Washington, Pullman, three specimens were found which proved to represent undescribed species. They are here described under the names Monostichella potentillae, Gloeosporidiella Shawii and Marssonina saxifragae. Further the taxonomy and the nomenclature of some genera belonging to the Melanconiales are briefly discussed.