F.W. Patterson, W.W. Diehl, and E.K. Cash [1-947]
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University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0031991
P. L. Ricker #s.n. 23 June 1922
Plasmopara halstedii (Farl.) Berl. & DeToni
United States, Maryland, North Beach;
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