Sorry I don't know either but that soil looks very dark peaty and waterlogged to me. Look especially around the two leaves bottom right, and the rest of the soil in both pics...that looks like water glistening on the soil??? 99.9% of cactus and succs need fast draining mixes to grow and thrive in, I'm not aware of any that don't. The soil looks totally wrong, that's probably why there is dead material there in both pots. Please please get them I nto a better mix before they all die off. Have those pots got hole in them, are they sitting in the outer pots that are full of run off water? Gill UK

Way to cool for words. Super nice really big tell your friend it's called. The walking Sanserveria IIRC it's Cv is of the cylindrica type. Pretty easy to root ( yours already has some roots already started ) and just as easy to grow. Not alot of posting going on in there but you may want to ask for more specifics in the Sanserveria forum. Thank - you and your donating friend for showing ( all of us here) such a wonderful Sans specimen.

Well I think you have something fairly rare and special:-) I am not 100%, but I am a 20 plus year collector who spends tons of time succulent shopping online and I'd bet money on it! Even if I am wrong, you'd benefit from following the growing culture of the Grapto. mendozae. Search for info on Graptopetalum and Echeveria, they are similar, then look to cover these 3 topics. Soil mix, watering habits and light exposure. Then move on to cold/heat tolerance (hardiness) and propagation. Most of what you learn on this plant should transfer to almost any succulent. Enjoy!

Your succulent is a Sempervivum:). Tbh I would just throw this guy out and here’s why. It looks like this plant had been in not enough light, then all of a sudden it was put in too much light too fast. All plants should be acclimated slowly to stronger light, even succulents. Semps are definitely an outside plant. I have yet to see a nice Sempervivum plant grown inside. They’re very hardy down to -20F. So outside they should go;). Next succulents need the best drainage around, and from the looks of it your mix looks water retentive. Most store bought cactus mixes are peat based which either retains water when watered too much. Then if let to dry out, which most succulents need, the peat will become hydrophobic and repell water. I find peat when dried out chokes the roots too. An easy fix is 50%-60 rinsed strained perlite or pumice combined with cactus mix. Pots should always have holes. Can succulents be grown in pots without holes? Yes, but it’s a tricky thing. Drainage holes are a must. Lastly if you decide to buy another Sempervivum they are monocarpic. Which means they bloom once and die:(. Most of the time they’ve produced little babies for you before they kick the bucket;). I have a few starting to bloom now. Goodluck;). ps- I hope I didn’t discourage you. Low light causes weak growth and it can be hard to bring them back. I’m just trying to save you time, but if you want to see what happens with your little plant that’s fine;). Just repot in the mix I suggested, try to get all the old mix off the roots before putting in new mix, and acclimate slowly to stronger light. Morning sun afternoon shade is a good start, and tbh that could be enough sun for your Semp depending on what your climate is like. Sempervivum fry in my summer sun no matter how slowly I acclimate;) edit: I was writing my long winded comment while Poly put up a nice short sweet one.