The Desert Museum Palo Verde is a hybrid species for the Tucson area, but not so much for Green Valley desert landscaping. This is a cross between the Blue, Mexican and Foothills Palo Verde, purportedly exhibiting the best of each of these species.
The Desert Museum variety is said to have the coloring of the Blue, the fast growing characteristic of the Mexican, and the smaller stature of the Foothills. It also has the shapely form of the Blue Palo Verde, our state tree.
There is no doubt the Desert Museum Palo Verde is an attractive tree, and it is a good thing to add another smaller desert tree to the repertoire of those available. The downside to this tree is that along with picking up the trait of a shorter size from the Foothills species, it also took on less cold tolerance. For this reason, this is a better choice for the Tucson area than for Green Valley, which is cold enough to set this tree back.