Since early 2017, the two research groups of the former «Institut für Spezielle Botanik und Botanischer Garten» are part of the new and larger «Institut für Organismische und Molekulare Evolutionsbiologie / Institute of Organismic and Molecular Evolution». Research and teaching of the two research groups include classical systematics, molecular phylogeny and historical biogeography ( Plant Evolution: J.W. Kadereit (retired) as well as functional morphology, ontogeny and experimental flower biology Diversity of Flowering Plants: R. Claßen-Bockhoff (retired)).
The Botanic Garden and Herbarium of Mainz University are associated with the Plant Evolution research group. The Green School and Prof. Dr. Gudrun Kadereit at the Institute of Molecular Physiology are close collaborators, and the Botanic Garden, Herbarium and Green School also are close collaborators of the Diversity of Flowering Plants research group.