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

Cornell University, Plant Pathology Herbarium
Catalog #: F.Dakotenses-0310
A. Stevens s.n.
Erysiphe polygoni DC.

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00052532
O. A. Stevens s.n. 22 September 1914
Erysiphe polygoni DC.
United States, North Dakota, Cass, near Fargo

Field Museum of Natural History
Catalog #: C0285426F
3ae7091c-bfe6-4af8-a2df-bd2f9cfeb062
O. A. Stevens #s.n. 22 September 1914
Erysiphe polygoni DC. DC.
U.S.A., North Dakota, Cass, Near Fargo

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP23207
O.A. Stevens s.n. 22 September 1914
Erysiphe polygoni DC.
United States, North Dakota, Fargo

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0015790
O.A. Stevens #s.n. 22 September 1914
Erysiphe polygoni DC.
United States, North Dakota, near Fargo

Brown University Herbarium
Catalog #: CBRU00000653
OA Stevens s.n. 22 September 1914
Erysiphe polygoni DC.
United States, North Dakota, Cass, Fargo;

Purdue University, Kriebel Herbarium
Catalog #: PUL00022983
OA Stevens s.n. 22 September 1914
Erysiphe polygoni DC.
United States, North Dakota, Cass, near Fargo