Cryptogamic Herbarium #4229
Department of Botany and Plant Pathology, Oklahoma Agriculture and Mech. College
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Iowa State University, Ada Hayden Herbarium
Catalog #: ISC-F-0083717
H.S. Jackson s.n. 25 October 1932
Erysiphe cichoracearum DC.
Canada, Toronto, Lake Shore, West of Humber, Toronto
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