H. Sydow and P. Sydow [1-3000]

Cornell University, Plant Pathology Herbarium
Catalog #: Syd.,Myc.germ.2513
s.n.
Peronospora Corda
Germany

USDA United States National Fungus Collections
Catalog #: BPI 1028036
s.n.
Peronospora knautiae Fuckel
Germany

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00062135
A. Ludwig s.n. 29 August 1931
Peronospora knautiae Fuckel
Germany, Westfalen: bei Silberg, Kreis Olpe

University of Michigan Herbarium
Catalog #: 335933
A. Ludwig #s. n. 29 August 1931
Peronospora knautiae Fuckel
Germany, Westfalen: bei Silberg, Kreis Olpe.

Academy of Natural Sciences of Drexel University
Catalog #: PH00314433
A. Ludwig #s.n. 29 August 1931
Peronospora knautiae Fuckel
Germany, Westfalen: bei Silberg, Kreis Olpe

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0075591
A. Ludwig #s.n. 29 August 1931
Peronospora knautiae Fuck.

USDA United States National Fungus Collections
Catalog #: BPI 789021
Ludwig, A. s.n. 29 August 1931
Peronospora knautiae Fuckel
Germany, Westfalen, Silberg, Olpe Kreis