Last post from Hope,
I present the "Smoke Tree"
I've seen the term in Havasu, as a street name.
Process of elimination, didn't work over the years, for I didn't stay late enough into summer to experience it. Only two trees out here, Palo Verde and Ironwood.
Not until '19 when I went to Az bike week, and caught the bloom in Scottsdale.
Those small lavender flowers from a distance look to be light grey, smoke colored, Ironwood.