Mystery Cactus, colum shaped, spikes on ridges.

I just recently got this cactus and it had nothing on it to identify it. The person working at the shop did not know what kind it was either. Its maybe 6 to 8 inches long. There are ridges all around it that are kind of wavy. Any help would be great. Thanks in advance!

katie

 

I think it is some kind of Lemaireocereus. I have a very similar one. I got it in 1999 about 4-5 in tall. It is now 21 in. I have to keep it in a small pot in the window. I can't have floor plants because of my animals or it would be bigger I am sure. Repot it only when you see roots coming out of the bottom.

 

Mystery cactus

Thanks. Does your bloom by any chance?

 

No, it has never bloomed. The only cactus I have that gets flowers is a Golden Barrel.

 

I have something that looks like that one.My friend from town gave me 2 and
they have multiplied.I was wondering
if it would bloom too.