Ellis & Everhart, N. Amer. Fungi. Ser. II
J.B. Ellis ; B.M. Everhart [1501-3600, plus extras]

USDA United States National Fungus Collections
Catalog #: BPI 959089
s.n.
Didymaria spissa Harkn.
United States

Chrysler Herbarium - Mycological Collection
Catalog #: CHRB-F-0005872
Dr. H. W. Harkness s.n.
Didymaria spissa Harkn.
United States, California, San Francisco;

Michigan State University Herbarium non-lichenized fungi
Catalog #: MSC0254924
Dr. H.W. Harkness s.n.
Didymaria spissa Harkn.
United States, California, San Francisco;

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00040435
Ellis #s.n.
Didymaria spissa Hark.
United States, California, San Francisco

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00040436
Ellis #s.n.
Didymaria spissa Hark.
United States, California, San Francisco

Miami University, Willard Sherman Turrell Herbarium
Catalog #: 000228543
H. W. Harkness #1642
Didymaria spissa Harkn.
United States, California, San Francisco

Iowa State University, Ada Hayden Herbarium
Catalog #: ISC-F-0070465
H.W. Harkness s.n.
Didymaria spissa Harkn.
USA, California, San Francisco, San Francisco;

University of Illinois, Illinois Natural History Survey Fungarium
Catalog #: ILLS00125410
H.W. Harkness #s.n.
Didymaria spissa Harkn.
United States, California, San Francisco, San Francisco.

USDA United States National Fungus Collections
Catalog #: BPI 415562
Harkness H. W. s.n.
Didymaria spissa Harkn.
United States, California, San Francisco

University of Illinois Herbarium
Catalog #: ILL00098919
HW Harkness s.n.
Didymaria spissa Harkn.
United States, California, San Francisco, San Francisco; San Francisco

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0088442
HW Harkness s.n.
Didymaria spissa Harkn.
United States, California, San Francisco, San Francisco