Leaves – simple, deciduous, alternate, about 5″, coarsely doubly serrate, usually scabrous above, and often pubescent below with an inequilateral base. Twigs – slender and zigzag. Buds – 1/4″, acute, ...

For more than a thousand years in eastern North America, anyone who wanted to build a house or replace a roof, or maybe just needed a few storage bins, a canoe, and a snow shovel, knew where to shop.

The American elm (Ulmus americana) was once a common sight on the Upper Mississippi River, but Dutch elm disease, or DED, has killed many trees. DED is an invasive fungal pathogen that is spread by ...

Dutch elm disease has been present in the United States since the 1920s, when it began its rapid spread across elm populations, killing most American elms. Every year the disease continues to spread ...

The Department of Environmental Conservation (DEC) just announced that a new invasive insect called the elm zigzag sawfly (Aproceros leucopoda) is threatening New York’s elm trees. The exotic pest was ...