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

Cornell University, Plant Pathology Herbarium
Catalog #: CaliforniaF.00309
s.n.
Erysiphe communis (Wallr.) Schltdl.

Michigan State University Herbarium
Catalog #: MSC0212950
J. P. Tracy s.n. 17 August 1930
Erysiphe communis (Wallr.) Schltdl.
United States, California, Humboldt, Big Lagoon

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP35243
J.P. Tracy s.n. 17 August 1930
Erysiphe communis (Wallr.) Schltdl.
United States, California, Humboldt, Big Lagoon

Field Museum of Natural History
Catalog #: C0285349F
J.P. Tracy #s.n. 17 August 1930
Erysiphe communis (Wallr.) Schltdl.
USA, California, Humboldt, Big Lagoon, Humboldt Lagoons State Park