1). Side Note: Beware using a wood chipper with mesquite. Color/Appearance: Heartwood tends to be a reddish brown, which darkens with age. Mesquites (Prosopsis spp.) Plant thorn arthritis is also called plant thorn synovitis. The diagnosis of plant thorn arthritis requires either detection of a piece of thorn within the joint by radiology testing or surgical removal of the thorn fragments and identification of the fragments microscopically in the laboratory. Yes I agree Mesquite is a beautiful wood but that tree is very mean. Continue pruning, and the tree will develop a nice canopy, providing great shade during the summer. They are able to reach up to 30 feet tall, but the average tree that is growing in the wild are going to be half that size. For smaller mesquite types that have smooth bark, they can be easily controlled via the stem spray method at a low concentration (15%). With a slow, but intense heat, mesquite is the perfect wood to throw on the fire on a cold winter night.