Phylogenomics resolves the evolutionary histories and taxonomy of the long‐associated North American legume genera Psorodendron and Psorothamnus

Key Points

• This research aims to clarify the evolutionary histories and taxonomy of the legume genera Psorodendron and Psorothamnus.
• Utilized genomic data to analyze relationships between species of Psorodendron and Psorothamnus.
• Investigated diversification patterns since the Miocene in southwestern North America.
• The analysis supports a taxonomic revision of various species and varieties within both genera.
• Findings indicate that Psorodendron and Psorothamnus have existed since the Miocene, showcasing their ancient lineage.