Hello,

Last picture is a euphorbia, top picture the red-ish one is a gymnocalicium michailovichii, the center one like an aloe/agave is a haworthia zebrina, guessing the green globular on the right is a notocactus (probably magnificus), front is a sort of seduum but you knew that :-)

Vlad

On the left at 9 o'clock there is a Matucana madisoniorum, in the rear maybe 2 Stenocereus griseus, in front of these maybe a Pilosocereus.

Jordi