Figure 5.

Estimated crown ages of long-stemmed “broom” clades in simulated trees using BEAST with UCLN and RLC clock models in combination with Birth-death (BD, black) and Yule (grey) phylogenetic tree models. Trees were simulated using TESS with a BD model and sequences simulated on the trees using PhyloSim with a local clock model in which the substitution rate was 10x slower in the broom clade than in its sister “bush” clade. Each large dot represents the mean age across 10 simulated trees, error bars are mean 95% BCIs, and small open circles represent the extreme 95% BCIs across all 10 datasets. The horizontal broken line shows the true age (25 Ma) of the broom crown node.