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

University of Illinois Herbarium
Catalog #: ILL00097334
Farlow s.n.
Peronospora halstedii var. ambrosioe
United States, Massachusetts, Middlesex, Cambridge; Cambridge

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00062084
Farlow s.n.
Peronospora halstedii var. Ambrosiae
United States, Massachusetts, Cambridge;

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00062117
Farlow s.n.
Peronospora halstedii var. ambrosiae
United States, Massachusetts, Cambridge;

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0086982
Farlow s.n.
Peronospora halstedii var. ambrosioe Farlow
United States, Massachusetts, Middlesex, Cambridge

Michigan State University Herbarium non-lichenized fungi
Catalog #: MSC0253401
Farlow s.n.
Peronospora halstedii ambrosiae
United States, Massachusetts, Cambridge;

USDA United States National Fungus Collections
Catalog #: BPI 188174
Farlow #210
Plasmopara halstedii (Farl.) Berl. & De Toni
United States, Massachusetts, Cambridge

Academy of Natural Sciences of Drexel University
Catalog #: PH00300627
Farlow #s. n.
Plasmopara halstedii (Farl.) Berl. & De Toni
United States, Massachusetts, Middlesex, Cambridge

Academy of Natural Sciences of Drexel University
Catalog #: PH00314307
Farlow #s.n.
Plasmopara halstedii (Farl.) Berl. & De Toni
United States, Massachusetts, Middlesex, Cambridge

USDA United States National Fungus Collections
Catalog #: BPI 957638
Farlow #s.n.
Peronospora halstedii var. ambrosiae
United States, Massachusetts, Cambridge

Miami University, Willard Sherman Turrell Herbarium
Catalog #: 000227789
W. G. Farlow #210
Rysotheca halstedii (Farl.) G.W. Wilson
USA, Massachusetts, Middlesex, Cambridge