On EBay it’s called a “Rare Argentina Prickly Pear”. It’s small, very spiny, and it has very interesting flowers. Look closely….
Just so you know, I put this one, the first one to bloom, out on the bloom table, and it sold within an hour. So you cannot buy this particular specimen anymore. It’s gone. But we do have more in bud, so you are in luck. And our other Tunilla species is even more flowerific.