P. Sydow and W. Zopf [1-4900]
USDA United States National Fungus Collections
P. Sydow #s. n. 00 October 1880
Erysiphe horridula (Wallr.) Rabenh.
Germany, Berlin Botanical Garden
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Iowa State University, Ada Hayden Herbarium
P. Sydow #s.n. 21 September 1880
Erysiphe cynoglossi (Wallr.) U. Braun
Germany, Berlin, Berlin; im bot. Garten. Berlin.
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