Palo Verde tree blossoms hang over the river walk as a cyclist rides by along the Rillito River near First Ave., Friday April 5, 2002. Photo by Aaron J. Latham

Aaron J. Latham
The name is Spanish and means "green stick"

The bark of a palo verde tree is green because it's filled with chlorophyll. Unlike most trees, this plant gets a lot of photosynthesizing done through its bark. According to The Arizona Native Plant Society, only about a third of the palo verde's food is produced by the leaves. 

Online producer for #ThisIsTucson. Fan of all cactus.