Please advise. It looks like mold. Doesn't wipe off. Is this something to worry about? Treatable?

Yes, info on Eup looks correct. Thanks!!

Yes, Cissus Tuberosa looks like it. Thanks!!

Don't know if I ever had ID on this. Had it along time. If you don't get the watering right it loses it leaves and you WAIT for them to appear again. It's in a 4" pot.

Poor neglected plant needs ID so I can take better care of it. Thinks its some form of caudiciform.

Soil looks a bit wet. What are you cactus planted in? Do all pots have drain hole?

Have had about a year and a half. Had it out in full sun for 2/3 of day. Didn't really like. Moved, it's starting to look better. It's in a 4 inch pot.

My first bloom from this cacti.

Yes, looking thru many photos I would say Ferocactus potsii. Thanks All!!

Unfortunately the photo was a pathway image and the cactus were a small part of it. I just loved how sparingly the spines were "arranged".
Does look like a variety of Echinopsis orygona.

Does anyone know what variety of cacti this is. All I have is somewhat fuzzy photo.

Bought this today. Needs some love, but not sure what it is? Can you all help?

Thanks for the info. I'll just keep an eye on it. Fingers crossed!!

I'm worried about my Spiral Totem pole. Overwatered back in October. Realized and pulled out of pot and removed most of soil to let completely dry. About a week later repotted. Has had very little water. Any sign of rain I move it to prevent watering. It has gotten a little bit. The marks at the top...

Can I plant succulents in ground in Coastal Southern California (San Clemente) in Winter?