Figure 2

Biogeographic scenario for Aloe. Distribution and biogeographic scenario for Aloe inferred from nucleotide and plastid data for 228 taxa in Xanthorrhoeaceae subfamily Asphodeloideae. Enlarged map shows the natural distribution of Aloe, with northernmost limits indicated by dashed line. Direction and timing of diversification events inferred from ancestral state reconstruction and penalised likelihood dating are shown by arrows. Histograms show branch-based (dispersal and extinction) and node-based (vicariance and peripheral isolations) events in speciation processes since the divergence of the Aloe crown group ~16 Ma.