The glorious show of autumn color is transitioning to the familiar browns ... Dr. Patton cited Purdue research results that support these recommendations: Tree leaves (both oak and maple) can be ...

In autumn, they fade to the colors on the common ... The key difference is to look out for the leaf width; shingle oak leaves are typically about an inch wider than willow oak leaves.

But for brown autumn leaves, like those of the English oak, the process is different. Browns are down to tannins in the leaves or the polymerisation of quinones. Brown is also a marker that cells ...

Sure we traditionally have some autumn color in our trees. The maples turn a pretty red color, but the red oak leaves generally turn brown and fall to the ground. However, this year seems different.