This is one of my local cacti...the ones I find at Walmart almost always say protect from frost...well really! I want on that can stand the weather in the Edwards Plateau. And this one can. What a bloom! I even have them in containers and they stayed out all winter.
In case you want to know, here is the big name for it....Coryphantha sulcatai. One web site called it a Coryphantha palmeri ..A common name is Pineapple Cactus