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

Miami University, Willard Sherman Turrell Herbarium
Catalog #: 000229744
H. Bilgram #2692
Physarum ditmari Rostaf.
United States, Pennsylvania, Philadelphia, Fairmount Park, [Chamouni]

University of Illinois Herbarium
Catalog #: ILL00099947
Hugo Bilgram s.n.
Physarum ditmari
United States, Pennsylvania, Philadelphia, Philadelphia; Philadelphia

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00065350
Hugo Bilgram s.n.
Physarum ditmari
United States, Pennsylvania, Philadelphia; in Fairmount Park, [Chamouni]

Chrysler Herbarium - Mycological Collection
Catalog #: CHRB-F-0015789
Hugo Bilgram s.n.
Physarum ditmarii Rost.
United States, Pennsylvania, Philadelphia, Philadelphia; Fairmount Park

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0089540
Hugo Bilgram s.n.
Physarum ditmari
United States, Pennsylvania, Philadelphia, Philadelphia

Michigan State University Herbarium non-lichenized fungi
Catalog #: MSC0258339
Hugo Bilgram s.n.
Physarum ditmari
United States, Pennsylvania, Philadelphia; Fairmount Park (Chamouni)

USDA United States National Fungus Collections
Catalog #: BPI 960166
Hugo Bilgram s.n.
Physarum ditmarii Rostaf.
United States, Pennsylvania, Philadelphia, Fairmount Park, Philadelphia

Cornell University Plant Pathology Herbarium
Catalog #: CUP-M-0233
Hugo Bilgram #572
Physarum virescens Ditmar
United States, Pennsylvania, Philadelphia, Philadelphia; Fairmount Park

Academy of Natural Sciences of Drexel University
Catalog #: PH00300214
Hugo Bilgram #s.n.
Physarum ditmarii Rostaf.
United States, Pennsylvania, Philadelphia, In Fairmount Park, (Chamounix), Philadelphia

Academy of Natural Sciences of Drexel University
Catalog #: PH00314186
Hugo Bilgram #s.n.
Physarum ditmarii Rostafinsky
United States, Pennsylvania, Philadelphia, Fairmount Park