I've had this cactus for about 4 years now and I'm not sure what it is. It's some kind of barrel cactus, but the needles are smaller and softer than others I've seen. It started out as just 1, but quickly sprouted many many smaller barrels. I've probably gotten a half dozen pups and several cuttings from it. It's about 6 inches tall now and has large white flowers on stalks over 6 inches long. If I can find the pics of the flowers, I'll put them up. No big hurry, just wondering what I've got. Thanks for any help.