The William Louis & Chicita F. Culberson Lichen Herbarium consists of about 107,000 lichen specimens including over 850 lichen types. It is focused mainly on collections of Cladoniaceae and Parmeliaceae, although collections of crustose lichens are increasing due to the activities of members of the Lutzoni lab. About 12,000 specimens of the Harmand's collection are exsiccates of Arnold, Desmazieres, Faurie, Flagey, Fries E., Fries Th., Funck, Harmand, Hepp, Leighton, Lojka, Malbranche, Mereschkowsky, Nylander, Olivier, Roumeguere, Schaerer, Zahlbruckner, and Zwackh.