I don't think we got a positive ID yet. It is Euphorbia, and I call it Crown of Thorns but that is a common name that can be applied to many of the hybrids and cultivars.
calm Ursula.....
I gave it the correct identification. This is called Euphorbia x lomi, it is a hybrid of Euphorbia lophogona and milii. The first two letter of each species made for x lomi.