Fig 1. Map of Turkey with the grid system classifying the different districts as it appears in the Flora of Turkey [25].

Districts colored in violet and pink correspond to those were populations of Tripleurospermum and Matricaria were collected, respectively (both for genome size assessments and molecular phylogeny). Mixed violet and pink indicates that both Tripleurospermum and Matricaria populations were found in those districts. Codes: * Anthemis Δ Matricaria ○ Tripleurospermum belong to those populations used for phylogenetic reconstruction only (the corresponding number is indicated in Table 1). Map created with mapchart.net.