The acorn, or oak nut, is the nut produced by oak trees and their close relatives. It is enclosed in a tough, leathery shell and borne in a cup-shaped cupule. Acorns play an important role in forest ecology as many species of animals consume them. Since it comes from the mighty oak tree, the acorn symbolizes greatness and perseverance through trials and hardship. Strengthen your wall art collection by featuring the Oak Acorn Wall Art in your home.