In my backyard is one of Ohio's most stubborn,
indigenous species of tree, little loved by groundskeepers, known as the
Hackberry. It is all over the place usually as little shrubs. Sometimes it
survives to become a big tree which is what we have in my backyard. The plant
has managed to adapt itself to insects feeding on its leaves by creating a
"Nipple Gall", little Hershey Kisses looking structures to limit the damage
done by bugs.
When I first saw it I thought it was some form of peach
tree wilt but now realize it's a scarring done by the plant for protection.