Yellow Palo Verde - Parkinsonia microphylla
Like the other Paloverde species, this one is a small tree, to 30 feet, or a shrub, and very spiny. It grows in desert habitats, particularly on hillsides, in eastern California and southwestern Arizona where it grows to elevations of 3,300 feet. The trees are broad, with branches often to the ground, and yellow-green in color, and the trunk can be more than a foot in diameter. The leaves are composed of 4-8 pairs of small leaflets. The flowers are borne in few-flowered clusters, and each is pale yellow and up to 1/2 inch in diameter. The 4-inch pods contain shiny seeds.