The collections in Oslo (O) have a total of approx. 300,000 objects and are divided into a Nordic herbarium (about 200,000 objects), a general herbarium (with about 45,000 objects from other countries), a type herbarium (with over 1,000 types) and a large collection of international fiction works (with about 30,000 objects) . The bulk of the material is Norwegian and it includes all fungal groups. Of foreign collections, pore fungi and bark fungi from all parts of the world and micro fungi from the Canary Islands and the Arctic make up a significant portion. The material includes the collections of Søren Chr. Sommerfelt (1794-1838), Ivar Jørstad (1886-1967), Finn-Egil Eckblad (1923-2000) and Leif Ryvarden (1935-).