Fig. S1.

Gene map of the plastid genomes for species belonging to the “Chinese” clade of Roscoea. Genes drawn inside the circle are transcribed clockwise, whereas those outside of the circle are transcribed counter-clockwise. Genes belonging to different functional groups are color-coded. The dashed gray area in the inner circle indicates the GC content. The thickness of the lines indicate the extent of the IR regions (IRA and IRB), which separate the genome into SSC and LSC regions.