University of Minnesota Lichen Herbarium
Houses specimens native to Minnesota as well as those from around the world.
www.tc.umn.edu/~wetmore/Herbarium/HERBHOME.htm
Arizona State University Lichen Herbarium
Provides a searchable database of the University's collection and an overview of its Sonoran Desert Lichen Flora Project.
ces.asu.edu/ASULichens
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