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

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00065925
s.n.
Polyporus betulinus (Bull.) Fr.
Germany, Sachsen: bei Leipzig

University of Illinois Herbarium
Catalog #: ILL00085101
Dr. Winter s.n.
Polyporus betulinus (Bull.) Fr.