I know, I know! This is NOT an “evergreen” tree… but here in the Sonoran Desert we have the Palo Verde tree (Green Tree) obviously named for its bark and I decided it works for this theme! If it is a dry year, the leaves fall off a Palo Verde and photosyntheses works through the branches and trunks. However there is no chance of this tree losing its leaves since it is growing in the wash.
It has recently had its beautiful display of yellow blossoms, which in turn has produced the green pods.
Below is picture of the Palo Verde trees in bloom in the wash in April.