Taken together, these elements suggest that there may be significant differences in diversification parameters among clades, which violates a central assumption of Bayesian dating that uses constant diversification priors for the tree branching process [ 64 ].
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A Multigene Phylogeny of Native American Hawkweeds (<i>Hieracium</i> Subgen. <i>Chionoracium</i>, Cichorieae, Asteraceae): Origin, Speciation Patterns, and Migration Routes.
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