Long before modern medicine, people turned to the willow tree for pain relief. Its bark contains a natural compound, the basis for aspirin, that has been used for centuries to soothe aches and pains.

All willow trees provide benefits, but some species have more to offer. Mature white willows can reach 75 to 100 feet tall with a gray-colored bark. The leaves are generally 2 to 4.5 inches long ...