Ellis, N. Amer. Fungi
J.B. Ellis [1 - 1500, plus extras]

USDA United States National Fungus Collections
Catalog #: BPI 390620
Harkness S. F. s.n.
Piggotia fraxini Berk. & M.A. Curtis
United States, Massachusetts, Thorndike

USDA United States National Fungus Collections
Catalog #: BPI 958172
Harkness S. F. s.n.
Piggotia fraxini Berk. & M.A. Curtis
United States, Massachusetts, Thorndike

Chrysler Herbarium - Mycological Collection
Catalog #: CHRB-F-0015902
S. F. Harkness s.n.
Piggotia fraxini Berk. & M.A. Curtis
United States, Massachusetts, Thorndike

Miami University, Willard Sherman Turrell Herbarium
Catalog #: 000246666
S. F. Harkness #743
Piggotia fraxini Berk. & M.A. Curtis
United States, Massachusetts, Thorndike

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00065505
S. J. Harkness s.n.
Piggotia fraxini Berk. & M.A. Curtis
United States, Massachusetts, Thorndike;

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00065506
S. J. Harkness s.n.
Piggotia fraxini Berk. & M.A. Curtis
United States, Massachusetts, Thorndike;

Academy of Natural Sciences of Drexel University
Catalog #: PH00309820
S. J. Harkness #s.n.
Piggotia fraxini Berk. & M.A. Curtis
United States, Massachusetts, Hampden, Thorndike

Michigan State University Herbarium non-lichenized fungi
Catalog #: MSC0253975
S.F. Harkness s.n.
Piggotia fraxini Berk. & M.A. Curtis
United States, Massachusetts, Thorndike;

Academy of Natural Sciences of Drexel University
Catalog #: PH00323102
S.J. Harkness #s.n.
Piggotia fraxini Berk. & M.A. Curtis
United States, Massachusetts, Hampden, Thorndike

University of Illinois Herbarium
Catalog #: ILL00097921
SJ Harkness s.n.
Piggotia fraxini Berk. & M.A. Curtis
United States, Massachusetts, Hampden, Thorndike; Thorndike

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0086690
SJ Harkness s.n.
Piggotia fraxini Berk. & M.A. Curtis
United States, Massachusetts, Hampden, Thorndike