The phylogeography of Eurasian Fraxinus species reveals ancient transcontinental reticulation.

Highlights: [•] We studied the phylogeography of the Eurasian species in the genus Fraxinus. [•] The nITS retrieved the classical view of the evolution of the section. [•] The nETS showed a separation of F. angustifolia in two paraphyletic groups. [•] This incongruence indicated an old reticulation between European and Asian ashes. [•] We provide a documented evidence of multiple reticulations within these temperate trees. [Copyright &y& Elsevier]