The International Botanical Congress, which was to be held in Brazil in July, 2023 has been cancelled. The COVID-19 pandemic, combined with the serious economic impact and social disruption, have made planning and fundraising to support the IBC in Brazil impossible. With these facts in mind the IABMS has concluded that the XX IBC in Brazil must be cancelled. We thank the Sociedade Botânica do Brasil for understanding this difficult decision. We know that the large botanical c

IAPT is pleased to announce the 2021 Stebbins Medal for an outstanding publication in phylogenetic systematics and evolution. The 2021 Stebbins Medal is awarded to: Luke T. Dunning, Jill K. Olofsson, Christian Parisod, Rhimjhin R. Choudhury, Jose J. Moreno-Villena, Yang Yang, Jacqueline Dionora, W. Paul Quick, Minkyu Park, Jeffrey L. Bennetzen, Guillaume Besnard, Patrik Nosil, Colin P. Osborne & Pascal-Antoine Christin. Lateral transfers of large DNA fragments spread function