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Additional file 3: Fig. S3. Partial alignment of amino acids sequences in another nine positively selected genes. (A-J): atpB, ndhA, ndhC, ndhI, ndhJ, and psbK, rpl20, rpoB, and rpoC1. The red blocks indicate the amino acids in twenty-two species with a high BEB posterior probability.

Additional file 2: Fig. S2. Morphological features of mericarps of twelve species. (A) Dorsal side views ofmericarps. (B) commissural side views of mericarps. (C) transverse sections. Scale bars:A=1.0 mm;B=1.0 mm; C=0.5 mm.

Additional file 1: Fig. S1. Phylogenetic tree reconstruction of the 62 taxa inferred from Bayesian inference (BI) analyses and Maximum likelihood (ML) based on nuclear internaltranscribed spacer (ITS) sequences. Numbers indicate Bayesian posterior probabilities (PP) and mamxium likelihood bootstrap values (BS), and (*) indicates maximumsupport in both two analysis, and (-) indicates mamxium likelihood bootstrap values (BS) less than 50 in Maximum likelihood (ML) analyses.

Additional file 3: Table S2. List of unique genes identified in plastomes of Peucedanum.

Additional file 1: Fig. S1. Analyses of RNA editing sites in twelve Peucedanum plastomes: (A) numbers of RNA editing sites distributed in different codon positions; (B) numbers of RNA editing sites presented in genes.