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

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00062107
Prof. Wm. Trelease s.n. 00 May 1884
Peronospora halstedii Farlow
United States, Wisconsin, Syene;

USDA United States National Fungus Collections
Catalog #: BPI 188150b
Trelease, Wm. s.n. 00 October 1882
Plasmopara halstedii (Farl.) Berl. & De Toni
United States, Wisconsin, Syene

Miami University, Willard Sherman Turrell Herbarium
Catalog #: 000247594
W. Trelease #1403b 00 October 1882
Rhysotheca halstedii (Farl.) G.W. Wilson
United States, Wisconsin, Syene

Michigan State University Herbarium non-lichenized fungi
Catalog #: MSC0254675
Wm. Trelease s.n. 00 October 1882
Peronospora halstedii Farlow
United States, Wisconsin, Syene;

Academy of Natural Sciences of Drexel University
Catalog #: PH00309422
Wm. Trelease #s.n. 00 October 1882
Peronospora halstedii Farl.
United States, Wisconsin, Dane, Syene

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0088183
Wm. Trelease #s.n. 00 October 1882
Peronospora halstedii Farl.
United States, Wisconsin, Dane, Syene