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

USDA United States National Fungus Collections
Catalog #: BPI 1020512
s.n.
Peronospora arthuri
United States

USDA United States National Fungus Collections
Catalog #: BPI 1020513
s.n.
Peronospora arthuri
United States

Cornell University, Plant Pathology Herbarium
Catalog #: S.E.,Econ.F.0282
B. D. Halsted s.n. 09 July 1892
Peronospora arthuri
United States, New York, Onondaga, Syracuse;