Warning: This graphic requires JavaScript. Please enable JavaScript for the best experience. Not all trees drop their leaves in the fall. Even in the height of winter ...

Few average Joes can correctly identify every species of oak growing in North America. That’s the kind of Final Jeopardy-level knowledge typically reserved for foresters, wildlife biologists, and very ...

A variety of red oak leaves show how different layers of the tree canopy can develop at different times, with the outer layer usually changing first. DURHAM, N.H.—Fall is in the air and thoughts turn ...

Over the years Ohio trees have had a continuing list of problems. Oak wilt is currently affecting oak trees. Before that, there was the Emerald Ash Bore for ash trees and earlier there was Dutch Elm ...

While out for a walk this weekend, some leaves were really in my face, which got me thinking about why. This is a very leafy time of year, with lots of leaves underfoot, so many that walking in the ...

As we walked into Marshland’s woods, we saw black cherry, tulip trees, a young sweet-gum grove, older groves of oak and hickory, then mostly second-growth forest of red, white, and chestnut oak as ...

Add Yahoo as a preferred source to see more of our stories on Google. Large oak tree in front of nice neighborhood Oak trees have been around for more than 50 million years, with individual trees ...

The beech tree, with its gray bark and striking red foliage, is a staple of the state's landscape. American beech trees are native to the eastern U.S. and grow in most states. Colonists brought ...

A scanning electron microscope reveals nematodes (highlighted in green) inside the spongy mesophyll of a European beech (Fagus sylvatica) leaf infected with beech leaf disease (BLD). Eggs are marked ...