Chronogram of slipper orchids inferred from the combined six chloroplast genes, and ancestral area reconstruction.

<p>The crown age of slipper orchids was set as a calibration point for time estimation. Two areas were defined: (A) Old World and (B) New World. The ancestral areas with the highest probabilitiy are shown above (S-DIVA) and below (Lagrange) the branches with pie charts.