Figure 2.

Phylogenetic relationship of Chrysanthemum taxa. The number after the taxon name represents the ploidy level. This schematic is compiled mainly based on Shen et al., 2021, as the phylogenetic topology inferred from low-copy nuclear genes and nrITS could be more convincing than those inferred from cp sequences (Liu et al., 2012; Lu et al., 2022a). It should be noted that it is challenging to distinguish taxa from each other within C. indicum complex and C. zawadskii complex, respectively.