It’s etiolated so that’s why there’s difficulty with finding an id, but I was thinking is looks similar to my Euphorbia globosa, but not exactly. So I was looking at globosa hybrids and your plant looks similar to Euphorbia globosa x Euphorbia obesa.

Here’s a pic from online.

Keep in mind the above pic is getting sufficient light so it’s much more compact.

Here’s another pic that’s more etiolated. Looks similar to yours, at least imo🙂.

Reminds me more of Euphorbia cooperi http://www.cacti.co.nz/library/euphorbia-cooperi/

That link doesn't seem to be working, I've tried it several times now.

Euphorbia Cooperi is this plant

@HU-141941865 Whatever the variety is, those plants are in trouble. You have either planted them in a soil mix that is too water retentive, or you are overwatering, or both.

Thanks Westes & Windberry (for the ID), cool looking plant.

Probably not as far gone as one might think; it's still recognizable. Euphorbias are incredibly tough plants, I bet it'll recover.

I am sorry I don't know it well enough to suggest remedy, other than correct the soil to much more porous & faster draining as suggested.

At minimum try 50/50 Cactus & Succulent mix & Perlite (or Pumice).

Also, the pot MUST have a drainage hole at the bottom, can't tell from your pix if your pot does or not.

@KarenS I have managed to kill just about every Euphorbia I have left out in the rain, so I have a different viewpoint as far as how tough they are. Euphorbia Cooperi apparently hates winter rain.

Good point on the drain hole. I guess on these kinds of posts I should never assume the drain hole is clear and working (or exists :) )

There is no way that Euphorbia is cooperi. For one the OP’s Euphorbia is lacking the zipper looking thorns, but it has more tubercles. Plus it is clearly a small Euphorbia because it is planted next to a Mammillaria elongata for size comparison.

Maybe E. obesa x E. suzannae?

@Kara Do you have any guess for what the plant in this eBay listing is? They claim Euphorbia Cooperi, but I am skeptical.

You know Westes it could be cooperi, but just a young plant. It could also be a cutting and the top growth is new. The few pics I see online of baby E. cooperi seem to resemble the EBay pic.

HU-141941865, I would have never guessed what your plant is until I was given one like it. After potting up and one year later, it looks a lot nicer. Can't find the picture I took.

Euphorbia submammillaris 'monstrose'

@stush2049 Here are photos of Euphorbia Submammillaris.

Thanks Westes,

Being monstrose, I think is grows different than regular submammillaris.

I was looking for photos of mine. I know I took some when I got it last year. Found it.

It is twice as large now.

@stush2049 Is it possible that both you and he have a cross between Euphorbia Submammillaris and Euphorbia Cooperi? The distinct bulb at the end of the stems is distinct and not typical for Submammillaris.

Since Euphorbia hybridize easily, anything is possible but I attributed it to poor growing conditions then improved. Or not! It grows into a massive clump in time. Very small and tiny growing.