Learning about the hummingbirds and the bees in floral diversity

The floral diversity and repeated shifts in pollination have inspired a series of scientists to study adaptive evolution in the genus. But until now many of the species relationships have been unresolved and hampered by the very thing that makes studying the genus so appealing. The rapid speciation and evolutionary radiation that makes studying adaptation in these groups so interesting have also meant the species relationships have been difficult to resolve -- until now.

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