Georgia's State Champion Osage-orange, located near the greenhouses and Cox Nature Trail in Stone Mountain Park, is a Great American Tree. The tree is 76" in diameter, 65' tall and has a 65' crown spread. It is estimated to be 75 to 100 years old. The Osage-orange tree was nominated to Georgia's Champion Tree register in 2006 by Rosemary Cox, daughter of Harold Cox. Harold Cox, a graduate of Kew Gardens in England, was named the Director of Horticulture by the Stone Mountain Memorial Association in 1961 and held the position for over thirty years. Certified arborists have inspected the tree, done some pruning work to help improve its health, and determined it was better to leave the vines, which have grown into the tree. Wood from the Osage-orange was once used for fence posts and archery bows. It's fruit is a bumpy, greenish-yellow, inedible ball, the size of a grapefruit. It exudes a white, sticky sap.