A evergreen tree growing to an average of 20 feet. It has spiny greenish trunk and branches. It blossoms thousands of five-petaled yellow dull flowers during a short growing season starting in early spring. Blue Palo Verde seeds are slightly larger and flatter, with thicker, harder shells than the other species. It grows faster and dies sooner than other species and used more as shelter than as a forage to livestock and wildlife. Found mainly in the lower half of New Mexico, Arizona and the southern tip of California.