Phylogeny and floral character evolution of Mentzelia section Bicuspidaria (Loasaceae)

Joshua Brokaw, John Schenk, Jessica Devitt & Destiny Brokaw
Mentzelia section Bicuspidaria (Loasaceae) is a monophyletic group of desert ephemerals that inhabit the complex, heterogeneous landscapes of the southwestern United States and northwestern Mexico. To investigate species circumscriptions and evolutionary relationships in Bicuspidaria, we employed phylogeny reconstructions based on DNA sequences from the plastid trnL-trnF, trnS-trnfM, ndhF-rpl32, and rpl32-trnL regions and the nuclear ribosomal ITS and ETS regions. Due to evidence of discordant relationships reconstructed from the plastid and nuclear partitions, we used coalescent-based...

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