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Fig. S1 Maps of each Silene vulgaris mitochondrial genome.

Fig. S2 Summary of chimeric ORFs > 300 bp in length.

Fig. S3 MAUVE alignment illustrating the general lack of conserved synteny among all four sequenced Silene vulgaris mitochondrial genomes.

Fig. S4 High-frequency recombination across large repeats.

Fig. S5 Alternative genome structures associated with a complex mitochondrial repeat in Silene vulgaris KOV.

Table S1 Chromosome summary

Table S2 PCR primers used to amplify probes for Southern blot hybridizations

Table S3 Shared sequence content with species with multiple sequenced mitochondrial genomes

Table S4 Recombination products demonstrating that recombination across small repeats is predominantly symmetrical