The Herbarium Hamburgense Lichen Collection is based on the private herbarium of the Hamburg elementary school teacher C.F.E. Erichsen, a distinguished botanist, lichenologist and author of the book “Flechtenflora von Nordwestdeutschland" (“Lichen flora from Northwest Germany”). Further extensive collections come from T. Feuerer (approx. 40,000 specimens worldwide), G. Ernst (especially Northern Germany) & B. Büdel (especially Peltulaceae).