Migula, Krypt. Germ., Austr. Helv. Exs. [Pilze]
E.F.A.W. Migula [1-425]

Cornell University, Plant Pathology Herbarium
Catalog #: Mig.,C.G,A.H-0005
s.n.
Didymium difforme (Persoon) Gray

Michigan State University Herbarium
Catalog #: MSC0253023
Hans Schinz s.n.
Didymium difforme (Persoon) Gray
Switzerland, Zurich;

Academy of Natural Sciences of Drexel University
Catalog #: PH00314155
Prof. Hans. Schinz #s.n
Didymium difforme (Persoon) Gray
Switzerland, Zürich, Zürich, Zurich