Overview: Why Compare Erigeron Chloroplast Genomes? Erigeron, commonly known as fleabanes, includes hundreds of species spread across temperate and mountainous regions worldwide. Unraveling their evolutionary relationships is challenging due to polyphyly, hybridization, and taxonomic ambiguity, especially among Old World taxa. A comprehensive comparative study of chloroplast (cp) genomes provides a stable, maternally inherited genetic framework…