Great plant, and great photo! Beautiful colours and clusters.
Yes, it is. But I was tired and put the wrong name on the plant. It should have been Euphorbia flanaganii, and I should have known better. (Corrections made.)
Funny how when we're tired, we can still do things, albiet a few silly mistakes, I speak for myself. I did not even notice; it's still a Euphorbia, and it's still a beautiful plant/photo.