Caesalpinia was split in Gagnon E, Bruneau A, Hughes CE, de Queiroz LP, Lewis GP (2016). "A new generic system for the pantropical Caesalpinia group (Leguminosae)". PhytoKeys. 71 (71): 1–160. doi:10.3897/phytokeys.71.9203
IDs of Caesalpinia (genus) will be reassigned to Caesalpinieae (tribe).
I'll take a crack at the Arizona observations. Most of them appear to be commonly cultivated species in urban areas.
Edit: Well, that was easy - there were only seven for the state. I think I can branch out a little.
@ tagging some top identifiers who may be able to help refine these observations that are currently at rank=tribe for Caesalpinieae:
https://www.inaturalist.org/observations/identify?reviewed=any&taxon_id=747312&lrank=tribe
@pioleon @jeanphilippeb @francisco3_tutor @blakesito @adorantes @ripleyrm @stevejones @najera_tutor @cwbarrows @susanmf @alexiz