Fig. 1

Tree and phylogenetic tree. a, b A typical mature tree of Tetracentron sinense. c Phylogenetic tree of nineteen species including divergence times based on 214 single-copy nuclear genes. Divergence times are indicated by the numbers around each node with 95% highest posterior density. The red dot represents a calibration point. All nodes have 100% bootstrap support in the Maximum Likelihood analysis. Light blue indicates core eudicots, dark blue indicates early diverging eudicots, orange indicates magnoliids, green indicates monocots, and light red indicates basal angiosperms. Green, red, and blue numbers above branches indicate the number of gene families that have expanded, contracted, and rapidly evolved (p value ≤ 0.01), respectively