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

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00032431
L.E. Schaerer, Bernae #s.n.
Opegrapha varia var. phaea (Ach.) Rabenh.
, Supra Kehrsalz.