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 ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Once a fixture of eastern US cities, ...

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, ...

Can a tree outrun a fungus? Possibly, if the American elm is given a head start, experts say. The iconic, vase-shaped giant has a lot of catching up to do. Handicapped for at least six decades by a ...

American elms, Ulmus americana, are native to North America from Saskatchewan to Nova Scotia and from Texas to Florida. They grow 60 to 80 feet tall, with a thick trunk, the shape of a vase and a ...

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.

This is the fifth in a series of Nature Notes columns on Frederick County’s trees. Discover Frederick’s diverse array of trees on a self-guided walking tour. To see all of the trees, it should take ...