I've only seen a couple specimens of this plant, about 12" across and the same high, rounded form, purplish leaves with yellow new growth. Colors are much more intense than in this photos - wine red and bright yellow. Very striking combination. Appreciate help identifying. Thanks.
If when you break off a leaf or stem it oozes a milky sap (mildly toxic stuff - be careful) then Rob B. is correct. That said there are about 2000 Euphorbia species. Of course not all are in cultivation. Perhaps you can take a cutting or a good clear photo to a local nursery?
Thanks SusanDunlap. It's not my plant so I won't be breaking any stems, but I'm pretty sure it's one of the 2000. I love pretty much every Euphorbia I've ever seen so I'm not surprised this is another!
