According to Llifle and Cactiguide the accepted scientific name is Rebutia canigueralii. Sulcorebutia or Rebutia rauschii are synonyms. I have it id’d in my brain as Sulcorebutia rauschiI. The little bit I’ve read about the differences between Sulcorebutia and Rebutia I think it’s more fitting as a Sulcorebutia:).

Rebutia is a mess at the moment. Medilobivia, rebutia, part of weighnartia, and sulcoreubtia got fused into one genus ,Chileorebutia joined eriosyce(has nothing to do with regular rebutia), and part of the new rebutia genus seems to be related to browningia/ex azureocereus herthligiana via dna analysis. Until they straighten it out, its going to be just rebutia...

I really didn't think anyone could help me, but you people are amazing. I don't know if they have such things (they don't here) as Cactus and Succulent award shows, but I can only imagine how a judge would feel trying to keep up with the latest names. I'm going to stay with Rebutia for now, mainly because it's easy to pronounce and no one I know would know the difference.......Below is a picture of one (since dead) that I grew a few years ago and why I want to try it again. Kara: mine looked more red then yours does, but could be my monitor.

Rebutia:

Maryl

I’m pretty sure your Rebutia above is Rebutia krainziana;). It’s a pretty little Rebutia and will get purple with more sun.

Kara: See, you made me look-lol. I dug up my old records and had listed this red flowered Rebutia as R. Wessnariana Krainziana. See that beigey color on the bottom of the plant going center left to right? I thought it looked like some sort of rot/fungus about to set in, but was assured by the vendor it wasn't anything to worry about. Sure enough, over winter under my grow lights, that beige color started taking over more and more of the plant and by spring it was a mushy beige mess. I'll never know if the flowers would have had more purple in them with more light the next year. There was no next year......So now I've found out that my Rebutia from this year will not be the same as my red flowered one from years ago. I guess I have a surprise in the waiting (if it survives under the grow lights over this winter). Thank you again for all the information..........Maryl