Euphorbia

I'll put a comment then I'll find out when you get an answer... Lol.

Looks very much like a type of Euphorbia Elke sure Spritz will know and probably have a variety hidden somewhere in her garden ..I ll have a wild guess at E.polychroma ...

Me too TT.

Thanks a lot. I'll make a label for it.

I found so many varieties, colours, heights and shapes of Euphorbia. I'll have to research this one. This is the closest:
http://z.about.com/d/gardening/1/0/Z/F/Euphorbia4_X1.JPG
at
http://images.google.ca/images?hl=en&um=1&q=Euphorbia&sa=N&start=0&ndsp=20

Am I right that it's a cactus?

The colors in this euphorbia are spectacular. Those quick springs we get in the north bloom before the fall color can go, to great effect!