Intricate patterns of phylogenetic relationships in the olive family as inferred from multi-locus plastid and nuclear DNA sequence analyses: A close-up on Chionanthus and Noronhia (Oleaceae)

► First multi-locus and well-sampled phylogeny of subtribe Oleinae and mostly Noronhia (Oleaceae). ► Extensive cases of polyphyly within the subtribe. ► Close relationships between Chionanthus and Noronhia that may involve hybridization. ► Colonization of Madagascar from late Cenozoic dispersal from Africa. ► Circumscription of the genus Chionanthus in great need of revision.