Schaerer, Lich. Helv. Exs. Ed. I [Bernae (Berne)]
Ludwig Emanuel Schaerer [1-650]
IndExs #729589223

University of Nebraska State Museum, C.E. Bessey Herbarium - Lichens
Catalog #: NEB00032366
L.E. Schaerer #517
Opegrapha atra Pers.
USA, Maine

Duke University Herbarium Lichen Collection
Catalog #: 396304
e3609610-ed8e-46a3-a8dd-04c834f9ddf8
Schaerer, Ludwig, Emanuel #s.n.
Mycoporellum obscurum (Pers.) A.L. Sm.
Switzerland, Bern, Prope Kehrsatz