could anyone help me with these guys

[cavalo_horse]

hello everyone, greetings from brazil! I have identified almost all of my cacti by now, looking at the topics here and at the llifle db. I'm still missing id of 8 plants, and I think I'll post them 2 by 2, starting with these.

the first one was collected near a beach at curaçao, in the caribbean, and has a blueish greyish color when in full sun.

the second one was gifted to me as a cut, with no roots at the time. at first I thought it would be a columnar cactus, but it didn't grew up.

none of them flowered yet. any ideas? thanks in advance.

[Lucy_V]

The second one looks like Astrophytum myriostigma cv. "Kikko"

[cavalo_horse]

hi lucy! it really resembles a kikko but i don't think it actually is one, because it was given to me by a friend that was not a cacti enthusiast, i don't think he would have such a rare kind of cactus. but hey if it really is a kikko i will very happy!

anyways thank you very much for answering!

[Lucy_V]

You are welcome! The columnar plant could be Cereus repandus, which is common in Curacao.

[cavalo_horse]

about that one, i was thinking about the stenocereus griseus, seems to match the description. what do you think?

[A_G_R]

Second one looks like a small cutting of a Cereus peruvianus (or whatever it's called now)

[cavalo_horse]

hi alejandro! i considered that at first, but it has only 5 ribs. can it be a c. peruvianus with only 5 ribs?