H.H. Whetzel and J.McL Waterston [1-200]
Iowa State University, Ada Hayden Herbarium
H. H. Whetzel #s.n. 03 May 1922
Erysiphe pisi DC.
Netherlands, Paget
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University of Wisconsin-Madison Herbarium
Whetzel #s.n. 03 May 1922
Erysiphe polygoni DC.
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USDA United States National Fungus Collections
Whetzel H. H. s.n. 03 May 1922
Erysiphe polygoni DC.
Netherlands, Paget
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USDA United States National Fungus Collections
Whetzel H. H. s.n. 03 May 1922
Erysiphe polygoni DC.
Bermuda, Paget, Netherlands
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