Question: Please review the attached
pictures of a Arizona Ash (Fantex) a homeowner has asked
us to look at. This is a 20+ foot tree, free flowing, there
are no constraints on the limbs and this limb was about
6 ½ feet into the tree. This homeowner has 2 of these
trees and both trees have had limbs like this. Can you tell
us why this tree limb did this, and what is going on with
Answer: The condition is called fasciation.
Some herbicides will cause such growth abnormalities. I
see it occasionally. Prune it out, and it will probably
not come back.
Or, leave it as a conversation piece. Here are some web
sites with additional information: