I don't know.
Looks like Pereskia grandifolia to me. Beautiful!! (some have it as grandiflora, but I think that is incorrect-you will find pix w/that name, though)
I agree with Rosemarie. It's common name is Rose Cactus. I just started a cutting from one with tangerine colored blooms.
I think i'll call it Rosemarie's Cactus in honor of our own extraordinary succulent nomenclaturista. ;-)
Brad...you're a crack up!