The tree that “powers our national pastime,” White Ash furnishes the wood from which Louisville Slugger baseball bats are crafted. Leaves have 5 to 7 stalked leaflets. Many cultivars are available for landscape uses. The Emerald Ash Borer has been found in Indiana! This insect, accidentally introduced from Asia, is lethal to all native Ash species, and the potential for destruction of native Ash trees rivals that of Dutch Elm Disease on American Elm.