American elms are elegant and beautiful native North American trees. Sadly, their numbers have been decimated by Dutch elm disease, which is caused by a pathogenic fungus called Ophiostoma novo-ulmi.

Brown University’s 155-acre campus is home to thousands of trees and is recognized for its impressive American elm collection. Last year, the campus lost an iconic community fixture, an elm tree ...

Leaves are probably the most common feature used to identify trees. But in winter, when so many trees have dropped their ...

The concepts, techniques, and gene cassettes we develop for the American chestnut will have broad applications in managing diseases affecting other important tree species such as Dutch-elm disease and ...

From gum and tulip trees to silver oaks, red maples and the rare but glorious American elm, Kelley is always on the lookout for a gem of a tree. Kelley, 36, grew up in Ithaca and is based in ...