Research in our lab focuses on the diversification and evolution of plant lineages. We use of the tools of molecular phylogenetics, phylogenomics, morphometrics, population genetics and field ecology to address basic questions about patterns of plant biodiversity: how many species are there? how are they delimited and identified? how are they related, and how strong are the barriers to gene flow between species? Our work also addresses the processes that generate and maintain biodiversity: what are the mechanisms of species formation and species persistence over time? what evolutionary processes explain the distribution of species and characteristics that we observe today? Our work is strongly specimen-based, and it is aimed at addressing ecological, evolutionary, and taxonomic questions.