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Morton Arboretum researcher solves mystery of the white oak

Researchers from The Morton Arboretum and Duke University have solved a mystery that has long shrouded our understanding of white oaks: where did they come from?
The approximately 125 white oak species in the Americas and 25 in Eurasia—including the massive bur oak of American prairies and savannas, the valley oak of California and the eponymous white oak of eastern North American forests—are important in forests and savannas throughout much of the northern hemisphere. Yet, despite their economic and ecological importance, not much was known about the evolutionary history of the white oak group until now.  Read more here.