Love the pic! My whole family is from Tucson and I don't remember anything that looked that lush. Still miss it though. Arizona always feels like home to me and nobody can beat an arizona sunset or the smell of rain that comes hours before the rain gets there!
It has to be trimmed to maintain a tree look. Up here that's tough though, the plant will die out from freeze during winter but it is root hardy so grows back each year. Not even sure it will make it here but I want to try. :)