A.B. Seymour and F.S. Earle [1-550, plus extras]

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00062201
A. B. Seymour s.n. 30 May 1891
Peronospora obducens J. Schröter
United States, Massachusetts, Medford; Middlesex Fells

Michigan State University Herbarium
Catalog #: MSC0214833
A. B. Seymour s.n. 30 May 1891
Peronospora obducens J. Schröter
United States, Massachusetts, Medford; Middlesex Falls

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP28989
A.B. Seymour s.n. 30 May 1891
Peronospora obducens J. Schröter
United States, Massachusetts, Middlesex Fells, Medford