Here's a better photo of the body

If anyone wants to trade I have a huge piece that broke off a few years ago. I would want something about the same size.

Anybody know what Gymnocalcium this is?

Here's a photo with a quarter on it to tell size a little better.

What the heck anybody know what this is? Genus at least?

Each winter I take this out and just lay it on cardboard and poor water of it once a month. It's become quite large! Each spring, back outside into this old birdbath. Again not sure what it is? Brain cactus a common name I guess?

I thought it's Easter Lily cactus by the flower, but when I saw the closer pic, hem not so sure.

The last cactus, rebutia probably? I had similar but not that large.

Sorry can't help much.

Btw, are those peanut cactus bloom other than orange? I am looking the one bloom Yellow.

"Btw, are those peanut cactus bloom other than orange?"

No it's orange. Pretty fowers easy to grow for sure.
Cacti pictured a very old some 35 years.

Second to last Mammillaria compressa maybe?

The gymno is gymnocalycium horstii.
could your mam be mammillaria karwinskiana?

Thanks for the tips, I will research those. It bloomed last year, but I don't remember the flower color. Here is another photo.

Edit:

Wow it could be either. I need to see the flower again. Hopefully it will flower. I have had a hard time making it flower. It has only flowered once. Super hardy though surviving hard frosts and sunburn in the spring.

This post was edited by Drew51 on Fri, Jul 19, 13 at 22:06