Thanks to Texas, the Tucson and Green Valley areas have a lovely species of mesquite to choose from called the Texas Honey Mesquite. While not just native to Texas, the Texas Honey Mesquite is actually found all over the west, from Kansas down into Mexico.
This mesquite species has a more weeping form than our native Velvet Mesquite, and the leaves are much brighter green. Another easy way to identify the Honey Mesquite is the leaves are larger, and widely spaced. This tree also produces catkin flowers and pods one would associated with mesquites.
The Honey Mesquite is deciduous, offering light, filtered shade when in leaf. It must have full sun and lots of room for its mature size of 25 feet tall and 30 feet wide. In its natural habitat, this tree tends to be more shrub-like, so if you want a tree you will need to shape it to form. Never top this tree or any other tree for that matter, in attempt to reduce its height. Always plant a shorter species if you want a shorter tree.
Reference: Mountain States Wholesale Nursery and Gregg Starr Nursery Plant Info Sheet, 1999.