Economic Fungi #A 7b.
A.B. Seymour and F.S. Earle [1-550, plus extras]
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University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0032305
H.L. Merrow #s.n. 12 May 1884
Plasmopara obducens Schrt.
United States, Michigan, Ann Arbor;
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