Copiapoa longistaminea subsp. imperialis Piombetti in Xerophilia 4(3): 78. 2015 Copiapoa longistaminea subsp. imperialis Piombetti in Xerophilia 4(3): 78. 2015Taxon for this nameCopiapoa longistaminea subsp. imperialis Piombetti in Xerophilia 4(3): 78. 2015