Data from: Phylogenomics, biogeography, and evolution of the blue- or white-fruited dogwoods

In this study, we combined data from RAD-seq, morphology, fossils, and
ecological niche to understand species relationships, biogeographic
history, ecological niche and morphological evolution of the blue- or
white-fruited dogwoods, the largest of the four major clades of Cornus.
Our phylogenomic analyses with RAxML and MrBayes recovered a strongly
supported and well-resolved phylogeny of the BW group with three
intercontinental disjunct clades in east Asia/Eurasia and North America -
of which two in subg. Kraniopsis are newly identified. Divergence time
analyses with BEAST and treePL and DEC-based total evidence analysis
resolved an ancestral range of the BW crown in eastern Asia or Eurasia in
the Late Cretaceous and ancestral ranges of the three disjunct clades in
Eurasia and North America during the Miocene, suggesting dispersal via the
North Atlantic and Bering land bridges. Character mapping and comparison
of ecological niche, morphospace, and rate of evolution shows evidence of
different divergence patterns in morphology, ecological niche, and
molecules of the disjunct sisters. The overall diversity bias towards EA
cannot be explained by a greater net diversification rate but rather an
early diversification of subg. Kraniopsis in EA. Although morphological
stasis was observed in most of the characters across the disjuncts,
evolutionary changes in vegetative, fruit, and habit traits may be
attributed to continental differences in temperature, precipitation, and
elevation. These findings in conjunction with previous studies suggest the
EA-ENA disjunct floras are an assembly of lineages descended from the
boreotropical or mesophytic flora through taxon-specific evolutionary
pathways.