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

Cornell University, Plant Pathology Herbarium
Catalog #: CaliforniaF.00770
s.n.
Erysiphe R. Hedw. ex DC.

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP39059
J. P. Tracy s.n. 11 August 1949
Erysiphe cichoracearum DC.
United States, California, Humboldt, Twin Lakes, near Snow Camp

University of California Berkeley, University Herbarium
Catalog #: UC966357
J. P. Tracy #18485 11 August 1949
Erysiphe asperifoliorum Grev.
USA, California, Humboldt, Twin Lakes, near Snow Camp

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0014892
J.P. Tracy #18485 11 August 1949
Erysiphe cichoracearum DC.
United States, California, Humboldt, Twin Lakes, near Snow Camp

Field Museum of Natural History
Catalog #: C0285289F
J.P. Tracy #18485 11 August 1949
Erysiphe cichoracearum DC.
USA, California, Humboldt, Twin Lakes, near Snow Camp

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP40090
Joseph P. Tracy s.n. 11 August 1949
Erysiphe cichoracearum DC.
United States, California, Humboldt, Twin Lakes, near Snow Camp

Michigan State University Herbarium
Catalog #: MSC0214096
Joseph P. Tracy #18485 11 August 1949
Erysiphe cichoracearum DC.
United States, California, Humboldt, Twin Lakes, near Snow Camp