Is bamboo a tree?

Before street signs and cell phones told us where we were, sometimes a tree did.

Grafting is one of humanity's oldest horticultural techniques. But what does putting one tree's branch onto another tree mean for the two originals?

We know trees pop up in unexpected places, but one of the most unexpected is hanging from a car rearview mirror. The story behind those little tree fresheners is a tale of spilt milk.

The relationship between bears and trees is deeper than you may think.

The mountain mahogany proves that being “in the middle” does not mean being ordinary.