Acta Phytotaxonomica et Geobotanica (APG) is an international peer-reviewed journal published three times a year by the Japanese Society for Plant Systematics. It is the continuation of the journal Societas Phytogeographica Kyoto, Japan. APG publishes research manuscripts in the fields of taxonomy, phylogeny, evolution, conservation, biogeography of plants (including algae and fungi) and related disciplines. Contributions devoted to new taxa, nomenclature, monographs, floristic studies and genetic variation are also invited.