Anonymous, Calif. FungiHerbarium of the University of California. [1- ? 1425]
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Cornell University Plant Pathology Herbarium
Catalog #: CaliforniaF.00773
s.n.
Erysiphe polygoni DC.
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USDA United States National Fungus Collections
Catalog #: BPI 948483
Lee Bonar #s.n. 16 August 1949
Erysiphe polygoni DC.
United States, California, Klamath, Highway 62, Crooked Creek, north of Klamath agency
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