Figure 1

Geographic distribution of sampled populations. Maps showing sampled populations of Epidendrum cinnabarinum (A) and E. secundum (B), and respective plastid DNA networks for each species (C and D). Pie charts reflect the frequency of occurrence of each haplotype in each population. Haplotype colours correspond to those shown in networks. Pie charts with solid and broken outlines indicate Caatinga and Brazilian Atlantic Forest populations, respectively. Nuclear genetic groups are indicated for E. secundum (Nuclear cluster 1 – black; Nuclear cluster 2 – grey). In the statistical parsimony networks (C and D), the haplotype frequencies are proportional to circle sizes. The number of mutations required to explain transitions among haplotypes is indicated along the lines connecting the haplotypes by cross hatches.