Importance of polyploidization for diversification of hyperdiverse <i>Euphorbia</i> subgen. <i>Esula</i> : polyploidy is positively correlated with increasing latitude, but negatively with elevation

Our large-scale study provides evidence that multiple polyploidisation events at different temporal scales have triggered diversification within the highly diverse genus Euphorbia, and that the spatial distribution of diploid and polyploid populations follow the general patterns revealed for flowering plants.