This blossom is on a plant in my backyard and I have been wondering what kind of plant it is ever since I moved here. I did some extensive searching using Google images and finally found what I think it is. It’s called Albizia Saman with an informal name of Monkeypod or sometimes Rain Tree. Everything I have read says that it is a tropical plant which makes me wonder what it is doing in Arizona and probably explains why I have not been able to find one like it at any local nurseries. What I read states that it grows into a huge tree but, mine is only a small shrub. Maybe it has been stunted by all the dry air.