Bark – grayish with interlacing ridges and alternating light and dark layers of inner bark. American elm (Ulmus americana) is a member of the Ulmaceae family, a group that includes 16 genera and ...

American elm trees (Ulmus americana) were once very common as forest and landscape trees in the eastern U.S. Their graceful vase shape and wide canopy made them especially popular for lining city ...

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 ...