The herbarium of the Institute of Organismic and Molecular Evolutionary Biology at Johannes Gutenberg University Mainz comprises about 65,000 objects: Herbarium specimens, a collection of freeze-dried mushrooms, a collection of fruits and seeds, and an extensive collection of stamps with plant motifs.
The herbarium was founded in 1964 by Dr. Ulrich Hecker, then custodian of the university's botanical garden.
The collection is primarily a reference collection for the flora of Rhineland-Palatinate and, above all, for the ongoing research projects at the institute. There is also a active exchange of plant material among the approximately 3,000 herbaria worldwide for research purposes. The special collections of the herbarium, such as the fruit collection, are of particular importance for teaching.