A.B. Seymour and F.S. Earle [1-550, plus extras]
University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
H. L. Merrow s.n. 12 May 1884
Peronospora obducens J. Schröter
United States, Michigan, Ann Arbor;
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Michigan State University Herbarium non-lichenized fungi
H. L. Merrow s.n. 12 May 1884
Peronospora obducens J. Schröter
United States, Michigan, Ann Arbor;
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Miami University, Willard Sherman Turrell Herbarium
H. L. Merrow #A7b 12 May 1884
Peronospora obducens J. Schröter
United States, Michigan, Washtenaw, Ann Arbor
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Charles Gardner Shaw Mycological Herbarium, Washington State University
H.L. Merrow s.n. 12 May 1884
Peronospora obducens J. Schröter
United States, Michigan, Washtenaw, Ann Arbor
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USDA United States National Fungus Collections
Merrow, H. L. s.n. 12 May 1884
Plasmopara obducens (J. Schröt.) J. Schröt.
United States, Michigan, Ann Arbor
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