The circumscription of Aster (Asteraceae) in Japan has been a subject of controversy. Its intrageneric phylogeny has also not been clearly elucidated. This study presents a well-resolved and strongly supported phylogenetic tree for the Japanese species of Aster based on complete sequences of the chloroplast genome. The results support the inclusion of Rhynchospermum verticillatus in Aster while also retaining the remaining species within Aster.
