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

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP23206
O. A. Stevens s.n. 00 September 1914
Erysiphe communis (Wallr.) Schltdl.
United States, North Dakota, Schafer

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00052342
O. A. Stevens s.n. 00 September 1914
Erysiphe communis (Wallr.) Schltdl.
United States, North Dakota, Schafer;

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0015792
O.A. Stevens #s.n. 00 September 1914
Erysiphe polygoni DC.
United States, North Dakota, Mckenzie, Schafer;

Brown University Herbarium
Catalog #: CBRU00000655
OA Stevens s.n. 00 September 1914
Erysiphe communis (Wallr.) Schltdl.
United States, North Dakota, McKenzie, Schafer;

USDA United States National Fungus Collections
Catalog #: BPI 922613
Stevens, O.A. #s. n. 00 September 1914
Erysiphe communis (Wallr.) Schltdl.
United States, North Dakota, Schafer