Palo Verde means “green tree” or “green pole” in Spanish. The bark of a Palo Verde is green because it is filled with chlorophyll. This tree conducts a majority of its photosynthesis in the bark and some in the leaves. This is the Foothill or Yellow Palo Verde in the Arizona Transition Zone area.
I saw these Quaking Aspen and Blue Spruce trees on a walk this morning.