Phylogenetic relationships of Rubieae inferred from Bayesian analysis with a relaxed clock of molecular data from the reduced data set:

<p>The Galium Clade. Shown is the 50% majority rule consensus tree; values above branches are posterior probabilities of at least 0.5 from a Bayesian analysis with molecular data only and values below branches are posterior probabilities of at least 0.5 from a Bayesian analysis with combined data (molecular data, trait data, biogeographical data). The Roman numeral indicates clade designation used by Ehrendorfer and Barfuss [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0207615#pone.0207615.ref012" target="_blank">12</a>]. Abbreviations of the major clade: <b>Ga</b>, Galium Clade.</p>