Ellis, N. Amer. Fungi
J.B. Ellis [1 - 1500, plus extras]

University of Illinois Fungarium - Fungi
Catalog #: ILL00097335
Farlow s.n.
Peronospora pygmaea (Unger) Unger
United States, Massachusetts, Middlesex, Newton; Newton

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00062314
Farlow s.n.
Peronospora pygmaea (Unger) Unger
United States, Massachusetts, Newton;

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00062307
Farlow s.n.
Peronospora pygmaea (Unger) Unger
United States, Massachusetts, Newton;

Michigan State University Herbarium non-lichenized fungi
Catalog #: MSC0253402
Farlow s.n.
Peronospora pygmaea (Unger) Unger
United States, Massachusetts, Newton;

USDA United States National Fungus Collections
Catalog #: BPI 957639
Farlow s.n.
Peronospora pygmoea (Unger) Unger
United States, Massachusetts, Newton

USDA United States National Fungus Collections
Catalog #: BPI 784867
Farlow s.n.
Plasmopara pygmaea (Unger) J. Schröt.
United States, Massachusetts, Newton

Wisconsin State Herbarium, Fungi
Catalog #: WIS-F-0086986
Farlow s.n.
Peronospora pygmaea (Unger) Unger
United States, Massachusetts, Middlesex, Newton

University of Michigan Herbarium
Catalog #: 336258
Farlow #s. n.
Peronospora pygmaea (Unger) Unger
USA, Massachusetts, Middlesex, Newton

Academy of Natural Sciences of Drexel University
Catalog #: PH00314323
Farlow #s.n.
Plasmoverna pygmaea (Unger) Constant., Voglmayr, Fatehi & Thines
United States, Massachusetts, Middlesex, Newton

Miami University, Willard Sherman Turrell Herbarium
Catalog #: 000227790
W. G. Farlow #211
Peronospora pygmaea (Unger) Unger
USA, Massachusetts, Middlesex, Newton

Academy of Natural Sciences of Drexel University
Catalog #: PH00300632
W. G. Farlow #211
Plasmopara pygmaea (Unger) Unger
United States, Massachusetts, Middlesex, Newton