I found Dominos under two different species names when I searched.
I found a comment on this site that Echinopsis 'dominos' and Echinopsis subdenudata are the same species.
http://cactiguide.com/forum/vi...
"dominos' is just a form with more woolly aeroles. Altman no doubt love to make up names for plants, so they seem more exotic or something. I'm fairly certain it's just a sales tactic."
