Beautiful!

It looks like a Pride of Barbados or a Mexican Bird of Paradise.

(My grandmother called her a Bird of Paradise.)

Here's a link.

Here is a link that might be useful: {{gwi:1060805}}

Here's a link.

Here is a link that might be useful: {{gwi:1060806}}

Definitely Caesalpinia gilliesii, grows like a weed in warm dry areas.

http://ag.arizona.edu/pima/gardening/aridplants/Caesalpinia_gilliesii.html