Schaerer: Lich. Helv. Exs.
Ludwig Emanuel Schaerer [1-650]

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00025201
L.E. Schaerer, Bernae #s.n.
Arthonia spadicea Leighton
, Helvetici

Uppsala University Exsiccati
Catalog #: L-114227
Schaerer s.n.
Arthonia vinosa Leighton
Switzerland, In sylvis circa Bernam