F.K.A.E.J. de Thümen [1-2300, plus extras]
University of Illinois Herbarium
s.n.
Oidium irregulare Peck
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University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
C.H. Peck #s.n. 00 July 1879
Oidium irregulare Peck
United States, New York, Monroe
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Purdue University, Kriebel Herbarium
CH Peck s.n. 00 July 1879
Oidium irregulare Peck
America, New York, Orange, Monroe;
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USDA United States National Fungus Collections
Peck Ch. H. s.n. 00 July 1879
Oidium irregulare Peck
United States, New York, Monroe
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USDA United States National Fungus Collections
Peck Ch. H. s.n. 00 July 1879
Oidium irregulare Peck
United States, New York, Monroe
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