Microscopic worms are attacking trees in the Northeast. Experts say Beech Leaf Disease could be devastating.

What Tree Is That? is a tree identification guide from the Arbor Day Foundation, featuring an easy-to-use, step-by-step process to identify nearly any tree in North America.

Leaves make food for the tree, and this tells us much about their shapes. For example, the narrow needles of a Douglas fir can expose as much as three acres of chlorophyll surface to the sun. The lobes, leaflets and jagged edges of many broad leaves have their uses, too.

The Gazette: Ash trees losing leaves doesn't mean trees are dying, experts say

The Gazette offers audio versions of articles using Instaread. Some words may be mispronounced. Tree experts say green ash trees that are losing leaves in Le Mars and other parts of northwest Iowa ...

Beech Leaf Disease is spreading around the Northeast and the microscopic worms that come with it are attacking trees in Massachusetts and Rhode Island. Arborists have been working on a potential ...

Trees are not a monophyletic taxonomic group but consist of a wide variety of plant species that have independently evolved a trunk and branches as a way to tower above other plants to compete for sunlight. The majority of tree species are angiosperms or hardwoods; of the rest, many are gymnosperms or softwoods.

In this article, you will learn how to identify many different types of trees. Most of these trees are common in North America, Europe, and other countries around the world. All of the thousands of species of trees fall into two categories – deciduous trees and evergreen trees.