Thelocactus hexaedrophorus

The first rebutia is rebutia CV sunrise

2nd is definitely not a notocactus, it's a echinopisis of some kind

anttisepp wrote: ↑Thu Apr 09, 2020 3:51 pm 10 years later: never seen no one flower but fruits abundantly.

Collect the seeds, grow them, once they are big enough keep some and sell the rest, then buy new cacti . Nice plant

Sarraceniacrazy wrote: ↑Tue Apr 07, 2020 2:47 am Looks like a spider mite infestation.

Do spider mites build nest like that ?

Last one is frailea grahliana

Thanks

Thanks DaveW. The turbinicarpus genus confuses me a lot. Got the last one identified as Turbinicarpus nikolae

Edit: do you have any information about Turbinicarpus nikolae ?
Can't find a lot online. Most plants I see a grafted.

That's one weird melocactus(I think) Coleocephalocereus?

austrocylindropuntia subulata, it's a cactus.

I have never used tweezers for plants except pulling out spines out of my hand.

The one Mike M recommends is good

It's a oreocereus, can't remember the species, maybe trolli, not sure .

I really don't know. Why don't you try and pot it up and keep the humidity high like growing cacti from seed. I have rooted tiny cuttings(offsets) this way. Good luck !

CactusInteruptus wrote: ↑Mon Apr 06, 2020 3:10 am Is this possible? A tubercle from my M. plumosa detached, and when I looked at it, it had a small root. Amazing. Will grow into a new plant?

Have you got a picture ?

Spider web ???