In Dr. Simpson's laboratory, we are engaged in an array of studies concerning angiosperm groups distributed throughout the world. Our projects range in scope from rigorous monographic and regional floristic treatments to phylogenetic analyses of world-spanning lineages. Many of us utilize phylogenies inferred from DNA sequence data to address systematic, biogeographic, and evolutionary questions. Traditionally, the Simpson Lab's field and biogeographic work has been directed toward the American Southwest, Mexico, and Central and South America, but we have also ranged into Africa, East Asia, and New Zealand.  Other lab interests include pollination biology, the evolution of plant breeding systems, and the interactions between native solitary bees and their New World plant hosts..

To learn more about us and our research, click on any of the names or subjects in the left-hand menu.