Events of divergence times
Three important divergent events are noticeable on the genomic-dating
tree. The first event is dated 5.58 Ma, marking the divergence between
the ancestor of L. columnaris and giant lobelias from East Africa
(Figure 5). The second occurred approximately 1.54 Ma and marked the
separation of populations in West Central Africa and North Bioko from
South Bioko. Finally, the third event is estimated to be 0.99 Ma
displaying the split of North Bioko and mainland Cameroon populations.