Q. grisea or arizonica
I counted 10 living oaks and one recently dead one in rainwater harvesting basins all throughout the Pavillions parking lot. I only found one small acorn on a tree, but caps on the ground show that at least that tree produced more acorns earlier in the year.
The basins seem shallow and ineffective. I doubt these trees are irrigated and suspect they would be larger if they had access to more runoff.
Little baby Bursera.
Clark County, Nevada, US
The largest mesquite I've seen in Albuquerque