It reaches the nicest proportions and character in the desert and southern high plains; in wetter locales, recent plantings may improve with time. Ours typically reach a 20' to 30' height and spread, casting filtered shade; in ideal conditions they get larger (like this older tree in an irrigated Bermuda lawn in Abq):
To those still not over being in the desert, they are considered shrubs, slow-growing, etc. That's more the case in drier sites. Even in cooler, semi-arid Denver, it grows back each year from the ground to about 10' high, used similarly to crepe myrtles in the lower midwest, where they are root-hardy but not top-hardy.
It's native to Desert Southwest arroyos, from just north of Albuquerque and Saint George, into low desert areas around Phoenix, Tucson, and Palm Springs. But due to the low desert's winter resort industry and greater evergreen tree choices, it's far less common in their landscapes - too deciduous. It is not native to "cold deserts", though I know of nice small trees in "banana belt" spots like Grand Junction.
A small, 10 year old tree growing on bedrock, with drip irrigation (a standard pink selection or 'Lucretia Hamilton'?):
As an arroyo tree, it's used to rare flashes of soaking water interrupting long, dry periods. That one's underplanted with Autumn Sage and Mescal Agave within gravel mulch, forming a companion planting of similar water needs for all roots.
The flowering shows up well against the green foliage and building shadows, showing that this is not a willow (Salix), but a desert member of the Bignoniacae family, related to Trumpet Vine, Catalpa, Cross Vine, and Yellow Bells.
Some minor winter freeze damage exists on this local native, but that simply means the owner needs to lose her fear, and prune out the dead branches and twigs.
Pink to burgundy are common, though most in the wild are white. It's a hummingbird and sphinx moth magnet. Some smell nice; most have no scent.
Many forget mature size; plan for mature size and don't pretend "plants can always be 'pruned back' ". These are on 15' centers, which will overgrow as each matures and fail visually at roadway traffic speeds (the 'Warren Jones' selection, I think):
This El Paso streetscape has similar traffic speeds as the above example, but the designer understood mature sizes. These are spaced at 20'-50' centers; near mature heights and nicely-pruned (a standard white or pink selection):
Imagine this tree planted in depressed areas, using passive water harvesting off nearby paving areas to irrigate, as in nature?