Identification: Cactus

i bought this cactus in the summer in West Virginia at Walmart and threw away the tag so i don't know what type of cactus it is.

help would be greatly appreciated.

http://i159.photobucket.com/albums/t151/letstalk_aboutspaceships/DSC00144.jpg

http://i159.photobucket.com/albums/t151/letstalk_aboutspaceships/DSC00145.jpg

 

Looks like Mammillaria spinosissima to me. :)

 

Good call. As there are so many species in the Genus, I applaud your discriminating eye Rosmarie

 

Thanks, Susan! :) I don't always get them correctly identified, but I give it a shot. I just happened to have a couple of these. Yes, there are SO many in the genus!

Looks like Sylvia hasn't been back to check for responses. I forgot to say earlier...if you got it from WalMart, chances are the tag (if it had one) said "cactus species".

 

right on. their growers probably purchase unidentified seeds in bulk - all correctly labeled "cactus"