USDA United States National Fungus Collections
s.n.
Erysiphe communis (Wallr.) Schltdl.
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USDA United States National Fungus Collections
s.n.
Erysiphe communis var. urticearum Westend.
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USDA United States National Fungus Collections
Fiedler s.n.
Uncinula bivonae Lév.
Germany, Doemitz
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