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Arizona State Tree

Palo Verde Tree - click to see all state trees
Palo verde tree - photo by G.A. Cooper @ USDA-NRCS PLANTS Database

Palo Verde

Palo Verde (genera cercidium) was designated the official state tree of Arizona in 1954 (the genus cercidium has been updated to Parkinsonia). Two species of Palo Verde are native to the Sonoran Desert in Arizona; Parkinsonia florida (commonly called the "blue Palo Verde") and Parkinsonia microphylla (called the "yellow Palo Verde").

"Palo Verde" is Spanish for "green stick." Blooming in the spring (beginning in late March and continuing until May), Palo Verde are beautiful trees that add vibrant color to the Arizona desert. Palo Verde seeds were a food source for the Pima and Tohono O'odham Indians of Arizona (the seeds were dried and ground in mortars to make a flour used for mush or cakes).

Palo verde tree blossoms - click to see all state trees
Palo verde tree blossoms
photo by G.A. Cooper @ USDA-NRCS PLANTS Database

Palo Verde is a relatively small tree that can reach a height of approximately 32 feet and a trunk diameter of 1.5 - 2 feet. This tree has a deep root system which allows it to tap into the ground water and survive periods of extended drought and withstand severe flash floods (which occur often in desert washes).

Palo Verde is drought deciduous (sheds its leaves during extended dry spells) at which time the tree relies on its green stems and branches for photosynthesis. The leaves of the Palo Verde tree are so small that even during the short period of the year when they are present (mid July to late November) it relies on the green branches and stems to help with photosynthesis.

Source:
Arizona State Symbols: Arizona SOS for Kids
Fact Sheet - Palo Verde: The Living Desert
The State Tree: Arizona Legislature
Links:
State Trees - 50 States List

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