Arnold, Lich. Exs. Lich. Jur. [Eichstätt]
Ferdinand Christian Gustav Arnold [1-1816]
IndExs #540905952

University of Colorado, Museum of Natural History Herbarium Lichen Collection
Catalog #: COLO-L-0087379
Arnold s.n.
Placidium tenellum (Breuss) Breuss
Germany

Lichen Herbarium of the Museum of Evolution, Uppsala University
Catalog #: L-165316
F. Arnold s.n. 00 November 1859
Involucropyrenium tremniacense (A. Massal.) Breuss
Germany, Bayern, Zwischen Wintershof und Ruppertsbuch bei Eichstätt

Lichen Herbarium of the Museum of Evolution, Uppsala University
Catalog #: L-165317
F. Arnold s.n. 00 May 1866
Involucropyrenium tremniacense (A. Massal.) Breuss
Germany, Bayern, Auen bei Ingolstadt