Brenckle, Fungi Dakot.
J.F. Brenckle [1-675, plus extras]

Cornell University, Plant Pathology Herbarium
Catalog #: F.Dakotenses-0378
O. A. Stevens s.n. 25 August 1915
Erysiphe polygoni DC.
United States, North Dakota, Near Fargo

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00052503
O. A. Stevens s.n. 25 August 1915
Erysiphe polygoni DC.
United States, North Dakota, Cass, near Fargo

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP23285
O.A. Stevens s.n. 25 August 1915
Erysiphe polygoni DC.
United States, North Dakota, near Fargo

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0015795
O.A. Stevens #s.n. 25 August 1915
Erysiphe polygoni DC.
United States, North Dakota, near Fargo

Brown University Herbarium
Catalog #: CBRU00000658
OA Stevens s.n. 25 August 1915
Erysiphe polygoni DC.
United States, North Dakota, Cass, Fargo;

Purdue University, Kriebel Herbarium
Catalog #: PUL00023023
OA Stevens s.n. 25 August 1915
Erysiphe Polygoni DC.
United States, North Dakota, Cass, near Fargo

USDA United States National Fungus Collections
Catalog #: BPI 922619
Stevens, O.A. #s. n. 25 August 1915
Erysiphe polygoni DC.
United States, North Dakota, near Fargo