Figure 1From: Molecular evolution of psbA gene in ferns: unraveling selective pressure and co-evolutionary patternDetail phylogeny along with geological time-scale of 28 species. Relied on the combined matrix (dataset 6, Additional file 1 Table S3, Additional file 2), the phylogenetic tree of 28 investigated species was reconstructed via BEAST packages. 27 nodes were numbered and tagged respectively. Length of each branch was in accordance with the estimated divergence time. Estimated parameters of each branch were showed in Table 2. Specific orders mentioned in the text were marked in phylogeny and species names within different orders were illustrated under phylogenies.Back to article page