Arizona State Tree - Yellow Palo Verde - Parkinsonia microphylla
Leaf: Alternate, bipinnately compound, with only 2 major leaflets making it appear as a pair of pinnately compound leaves, each about ½ inch long, green and short lived.
Flower: Loose clusters of bright yellow flowers with 5 lobes, entire flower ½ inch across, appearing in spring and early summer.
Fruit: Two to 4 inch cylindrical legume swollen at seeds, sharply pointed at ends, light brown, matures in the summer, persist on the tree.
Twig: Slender to moderately stout, yellow-green, smooth, each short twig ending in a sharp point.
Bark: Initially smooth and yellow-green, later turning light brown and a bit scaly.
Form: Large shrub or small tree (up to 25 feet tall) with a crocked trunk and
a wide spreading crown with many fine branches, leafless for much of the year.
Conservation; Photos and text by: John Seiler,
Edward Jensen, Alex Niemiera, and John
Peterson; Silvics reprinted from Ag Handbook 654;
range map source information