John Kress,a botanist and curator with the Smithsonian, says the team that created the exhibit had a different idea.

VOA: special.2009.12.01

But it is only a beginning. John Kress of the Smithsonian says that, while science accepts evolution, debate continues.

VOA: special.2009.12.01

John Kress and David Erickson, who both work at the Smithsonian, have barcoded all 689 species listed in World Economic Plants.

ECONOMIST: Taxonomy