International Botanical Congress (
IBC) is an international meeting of
botanists in all scientific fields, authorized by the
International Association of Botanical and Mycological Societies (
IABMS) and held every six years, with the location rotating between different continents. The current numbering system for the congresses starts from the year 1900; the XVIII IBC was held in Melbourne, Australia, 24–30 July 2011, and the XIX IBC will be held in
Shenzhen, China, 23–29 July 2017.