Thümen, Fungi Austr. Exs.F.K.A.E.J. de Thümen [1-1200]
University of Illinois Herbarium
de Thümen s.n.
Erysiphe communis f. ajacis
Czech Republic, Bohemia, Tetschen; Tetschen
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USDA United States National Fungus Collections
Thuemen #1241
Erysiphe polygoni DC.
Czechoslovakia, Bohemia
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