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

Lichen Herbarium of the Museum of Evolution, Uppsala University
Catalog #: L-115252
s.n.
Verrucaria dufourii DC.
Switzerland, In m.Scheibe et Gromsel

Arizona State University Lichen Herbarium
Catalog #:
L.E. Schaerer s.n.
Verrucaria dufourii DC.
Switzerland, Bern, Scheibe Mountains and Grimsel Mountains