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

Cornell University, Plant Pathology Herbarium
Catalog #: CaliforniaF.00633
s.n.
Erysiphe hydrophyllacearum U. Braun

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP31462
J. P. Tracy s.n. 09 May 1943
Erysiphe cichoracearum DC.
United States, California, Humboldt, Trinity River Valley opposite Willow Creek

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP40028
J. P. Tracy s.n. 09 May 1943
Erysiphe cichoracearum DC.
United States, California, Humboldt, Trinity River Valley opposite Willow Creek

University of California Berkeley, University Herbarium
Catalog #: UC756707
J. P. Tracy #17417 09 May 1943
Erysiphe hydrophyllacearum U. Braun
USA, California, Humboldt, Trinity River Valley opposite Willow Creek

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0014891
J.P. Tracy #17417 09 May 1943
Erysiphe cichoracearum DC.
United States, California, Humboldt, Trinity River Valley opposite willow creek

Field Museum of Natural History
Catalog #: C0285290F
J.P. Tracy #17417 09 May 1943
Erysiphe cichoracearum DC.
USA, California, Humboldt, Trinity River Valley opposite Willow Creek

University of Florida Herbarium
Catalog #: FLAS-F-41876
J.P. Tracy #17417 09 May 1943
Erysiphe cichoracearum DC.
United States, California, Humboldt, Trinity River Valley opposite willow creek

Michigan State University Herbarium
Catalog #: MSC0214059
Joseph P. Tracy #17417 09 May 1943
Erysiphe cichoracearum DC.
United States, California, Humboldt, Trinity River Valley opposite Willow Creek