**Code**: [O](https://sweetgum.nybg.org/science/ih/herbarium-details/?irn=124083) **Organization**: University of Oslo (O) **Department**: Natural History Museum **Location**: Oslo, Norway **Total number of specimens**: 1808000 **Current status**: Active **Date founded**: 1863 **Taxonomic coverage**: All groups **Geographic coverage**: Worldwide **Incorporated herbaria**: HUBO (2015, 8000 Aphyllophorales), NLH (vascular plants) **Important collectors**: E. Baardseth, A. Bjørnstad, A. G. Blytt, M. N. Blytt, C. Bock, E. Christophersen, E. Dahl, O. Dahl, H. F. A. von Eggers, R. E. Fridtz, A. Hagen, I. Jørstad, B. B. L. Kaalaas, J. Lid, B. A. Lynge, R. Nordhagen, J. M. Norman, H. Printz, A. von Rosthorn, L. Ryvarden, S. C. Sommerfelt, J. Stordal, P. Størmer, P. Wendelbo, J. N. F. Wille, F. Wischmann **Notes**: Updated June 2021 (incorporated collections). Herbarium HUBO was incorporated into O in 2015. Herbarium NLH (non-Nordic vascular plants) was incorporated into O in 2015. Non-functional web link reomoved in Aug 2022. **Date modified in Index Herbariorum**: 2023-05-25 > [!cite] This page is automatically generated • Data on this page were obtained from [Index Herbariorum](https://sweetgum.nybg.org/science/ih/) on 2023-08-23. • Meaning of acronyms in TL-2 is not always the same as in IH. Consult list of original [[Abbreviations|abbreviations]] if you suspect acronym mismatch.