Blue Palo Verde 

Blue Palo Verde is a native of the Sonoran Desert.

IDENTIFICATION: This species is found in desert areas, typically near rivers or desert wash areas that receive at least intermittent water. It reaches 15-30' (4.6-9.1 m) in height. Leaves are bipinnate, with leaflets ⅛-¼" (3.2-6.3 mm) long. It is found in association with honey mesquite, smoketree, ironwood, desert willow, and catclaw acacia.

Source: https://florafinder.org/Species/Parkinsonia_florida.php 

Palo verdes are among the plants that are referred to as drought deciduous. Being drought deciduous is among the important adaptations of many desert plants. These plants lose their foliage under dry and hot weather condition with the aim to help conserve the water that may be lost otherwise through transpiration. 

Source: https://www.gardenguides.com/12578182-adaptations-of-the-palo-verde-tree.html#:~:text=Palo%20verdes%20are%20among%20the,be%20lost%20otherwise%20through%20transpiration.