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

Uppsala University Exsiccati
Catalog #: L-115333
#183
Microthelia petraeicola Linds.
Switzerland, Buembach, Matrix: Lecidea petraea

Arizona State University Lichen Herbarium
Catalog #: 507699
L.E. Schaerer s.n.
Lecidea petraea (Wulfen) Ach.
Switzerland, Bern, Buembach