F.K.A.E.J. de Thümen [1-750, plus extras]

University of Illinois Herbarium
Catalog #: ILL00085291
s.n.
Microsphaeria friesii

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00059774
W. R. Gerard s.n.
Microsphaera friesii Lév.
United States, New York, Dutchess, Poughkeepsee;