P. Sydow [1-350]
USDA United States National Fungus Collections
s.n.
Peronospora polygoni Halst.
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USDA United States National Fungus Collections
s.n.
Peronospora polygoni Halst.
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USDA United States National Fungus Collections
Sydow, P. s.n. 04 August 1900
Peronospora polygoni Halst.
Germany, Zehlendorf, Berlin
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