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

Cornell University, Plant Pathology Herbarium
Catalog #: CaliforniaF.00326
s.n.
Microsphaera alni (DC.) G. Winter

USDA United States National Fungus Collections
Catalog #: BPI 948033
s.n.
Microsphaera alni (DC.) G. Winter
United States, California

Michigan State University Herbarium
Catalog #: MSC0212966
H. E. Parks s.n. 00 November 1931
Microsphaera alni (DC.) G. Winter
United States, California, Humboldt, Near Trinidad

University of California Berkeley, University Herbarium
Catalog #: UC538819
H. E. Parks #3733 00 November 1931
Microsphaera penicillata (Wallr.) Sacc.
USA, California, Humboldt, Near Trinidad

Field Museum of Natural History
Catalog #: C0285803F
c665fc15-b2f4-44e2-af81-e1504a7e71d1
H. E. Parks #s.n. 00 November 1931
Microsphaera alni (DC.) G. Winter (DC.) G. Winter
U.S.A., California, Humboldt, Trinidad; Trinidad, Near Trinidad

Iowa State University, Ada Hayden Herbarium
Catalog #: ISC-F-0087731
H.E. Parks #s.n. 00 November 1931
Microsphaera penicillata (Wallr.) Lév.
USA, California, Humboldt, Near Trinidad

University of North Carolina at Chapel Hill Herbarium
Catalog #: NCU-F-0015368
Parks, Harold Ernest #s.n. 00 November 1931
Microsphaera alni (DC.) G. Winter
United States, California, Humboldt, Near Trinidad