Anonymous, Calif. Fungi
Herbarium of the University of California. [1- ? 1425]

Cornell University Plant Pathology Herbarium
Catalog #: CaliforniaF.00328
s.n.
Microsphaera alni (DC.) G. Winter

Charles Gardner Shaw Mycological Herbarium, Washington State University
Catalog #: WSP35291
J. P. Tracy s.n. 30 September 1928
Microsphaera alni (DC.) G. Winter
United States, California, Humboldt, head of South Yager Creek

Michigan State University Herbarium non-lichenized fungi
Catalog #: MSC0212968
J. P. Tracy s.n. 30 September 1928
Microsphaera alni (DC.) G. Winter
United States, California, Humboldt, Head of South Yager Creek

University of California Berkeley, University Herbarium
Catalog #: UC538837
J. P. Tracy s.n. 30 September 1928
Microsphaera extensa var. curta U. Braun
USA, California, Humboldt, Head of South Yager Creek

Field Museum of Natural History
Catalog #: C0285806F
277d49f3-0c9d-44f9-857f-a3d19e4de255
J. P. Tracy #s.n. 30 September 1930
Microsphaera alni (DC.) G. Winter (DC.) G. Winter
U.S.A., California, Humboldt, Head of South Yager Creek

USDA United States National Fungus Collections
Catalog #: BPI 948035
J. P. Tracy #s.n. 30 September 1928
Microsphaera alni (DC.) G. Winter
United States, California, Humboldt, Head of South Yager Creek

Iowa State University, Ada Hayden Herbarium
Catalog #: ISC-F-0087715
J.P. Tracy #s.n. 30 September 1928
Microsphaera extensa Cooke & Peck
USA, California, Humboldt, Head of South Yager Creek

USDA United States National Fungus Collections
Catalog #: BPI 556384
Tracy J. P. s.n. 30 September 1928
Microsphaera alni (DC.) G. Winter
United States, California, South Yager Creek, Humboldt Co. Head of

University of North Carolina at Chapel Hill Herbarium: Fungi
Catalog #: NCU-F-0015482
Tracy, Joseph P. #s.n. 30 September 1928
Microsphaera alni (DC.) G. Winter
United States, California, Humboldt, Head of South Yager Creek.