The main part of the botanical collections consists of objects of dried, dead material (evidence) preserved in herbariums, internationally known as TRH collections.
The collections also include objects, tissue samples and DNA extracts stored in frozen condition (ColdGene), and other dry-stored object collections. In addition, there are the botanical collections of live plants at the museum's botanical gardens.
As of 31 December 2009, the botanical collections (herbarium TRH) include approx. 402,000 objects.
The NTNU University Museum at Norwegian University of Science and Technology (Herbarium TRH) holds plant materials for scientific studies.
Please see enclosed documents: