Migula, Krypt. Germ., Austr. Helv. Exs. [Flechten] [Karlsruhe]
E.F.A. Walter Migula [1-350]
IndExs #682473216

Field Museum of Natural History
Catalog #: C2013453F
W. Migula s.n. 00 December 1926
Placynthium nigrum (Hudson) Gray
Germany, Thuringia, Petersberg, [precise locality unknown]

University of Illinois Herbarium
Catalog #: ILL00038533
W. Migula #s.n. 00 December 1926
Placynthium nigrum (Hudson) Gray
Germany, Thuringen: Eisenach am Petersberge