Abstract
Premise of research. Chamaecrista sect. Chamaecrista ser. Coriaceae comprises 22 species, mostly distributed in the highlands of Brazil in Cerrado (Neotropical savanna) and Campo Rupestre (upland rocky field) vegetation. Phylogenetic studies for plant taxa of these rich and endemic Brazilian floras are still scarce. In this context, the main objective of our study was to examine the phylogenetic history of a plant group diversified in the mountainous areas of central Brazil.Methodology. The phylogeny of Chamaecrista ser. Coriaceae was examined with combined data from two nuclear regions (ETS [external transcribed spacer] and ITS), two plastid regions (trnD-T and trnL-F), and morphological evidence from comprehensive sampling of the series. We used phylogenetic analyses to evaluate morphological-character evolution to identify putative synapomorphies, and we used Bayesian estimation to explore the timing of diversification of the group.Pivotal results. The series, as currently circumscribed, appears as pol...
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