Taxon is the bi-monthly journal of the International Association for Plant Taxonomy and is devoted to systematic and evolutionary biology with emphasis on plants and fungi. It is published bimonthly by the International Bureau for Plant Taxonomy and Nomenclature, c/o Institute of Botany, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 23 Bratislava, Slovakia. Details of page charges are given in the Guidelines for authors. Papers will be reviewed by at least two specialists. Editor-in-chief: Prof. Joachim W. Kadereit.