A system of plant taxonomy, the Wettstein system recognised the following main groups, according to Richard Wettstein's Handbuch der Systematischen Botanik (1901–1924).
Synopsis
First edition
Second edition
Note: This is a selected list of the more influential systems. There are many other systems, for instance a review of earlier systems, published by Lindley in his 1853 edition, and Dahlgren (1982). Examples include the works of Scopoli, Batsch and Grisebach.