This week, we introduce the American elm or Ulmus americana. The American elm, also called white elm, is easily identified by its simple doubly-serrated oval leaves, which feature a large tooth with ...

The most common North American deciduous trees are elm, willow, beech, cherry, birch, and basswood. These trees each have their own unique qualities, from the heart-shaped leaves of the birch to ...

However, almost all mature American elm trees have been killed in the last 50 years by Dutch elm disease, which is caused by a fungus, Ophiostoma novo-ulmi, introduced from Asia. Elm bark beetles ...

As Rhode Island settles into the colors of a New England fall, students and community members may notice one exception to the emblazoned foliage on campus: the American elm tree on the Main Green. The ...

Prior to the introduction of Dutch elm disease, the native elm bark beetle was not a major pest. The two non-native species are more aggressive with drought-stressed American elms.

The shape of trees, in part, is caused by genetics. A Red Maple has a different shape and structure than an American Elm tree because their cells contain a different set of genes passed down from the ...