Mesquite is the common name for several species of small trees in the genus Prosopis. They are native to the southwestern United States and Mexico (except for creeping mesquite, which is invasive in southern California). Mesquite is one of the most expensive types of lumber in the U.S. A mature tree can be milled and sold for thousands of dollars. It was a very popular type of wood used by early Spaniards to build ships; but is now used most commonly for high end rustic furniture and cabinets.