I have two copiapoas cacti's one is a Copiapoa humilis ssp. humilis 'maritima' the other is a Copiapoa barquitensis which is supposed to be globular mine is rather tall and not globular at all which make me wonder if it truly is a Copiapoa barquitensis. The copiapoas have long roots as shown in the photos on this website kadasgarden.com/Cpotting.html
I do not have a scanner or a way I can load the ones I have and wish I could because I sure wish I could find out whether the Copiapoa barquitensis truly is one or not.