Sequence identity among plastomes of I. paraguariensis, I. dumosa and I. cornuta, using Panax ginseng as the reference. For each species (indicated by its initials), the peaks and valleys depict sequence identity estimated against the reference sequence, between 50% (lower line) and 100% (upper line). The horizontal axis shows the position (in Kbp) along the linear chloroplast. Only some features are indicated in each block for guidance; full maps are shown in Figure S2. Regions with missing data are indicated by empty spaces. Grey arrows above each panel denote transcription sense for each gene. Plastomic regions are colour coded as follows: light blue, protein coding (exons); green, tRNAs genes; violet, rRNA genes; pink, non-coding regions (introns and intergenic spacers).