The red pigments in some fall leaves have proven to be a puzzle for researchers who debate why leaves bother to go red.

The Odessa American is the leading source of local news, information, entertainment and sports for the Permian Basin.

Waiting until the leaves drop in fall is a rule of thumb for pruning shade trees, mainly because you can see bare limbs better, and the job is less “messy” without leaves attached to the cut branches.

• A robust understanding of phloem functioning in tall trees evades us because current methods for collecting phloem sap do not lend themselves to measuring actively photosynthesizing canopy leaves. • ...

The winter months are the ideal time to prune oak trees in Michigan if you don’t want to put them at high risk for oak wilt. Oak wilt is a fungal disease that can weaken white oaks and kill red oak ...

Consider oaks — especially the northern red oak — Minnesota’s second act for leaf-peeping. After sumac and maples retire their fiery reds, oaks add scarlet, maroon and mahogany to the landscape.

Ludington State Park’s “tree identification pathway” has 14 signs with fun facts about trees that line both sides.

Watch an oak tree growing from an acorn to a young plant over 133 days in this time-lapse. We picked white oak because it can be germinated immediately without a need for cold-stratification like red ...

A red oak tree now replaces the tree on Constitution Hill in Lanesboro that was blown down during a recent windstorm. The tree that stood on this hill for so many years was practically destroyed ...