Subspecies, varieties, forms and cultivars of plants belonging to the Echinopsis mamillosa group

• Echinopsis hystrichoides F.Ritter: It is a very spiny species. The spines are particularly strong and very ornamental.
• Echinopsis mamillosa Gürke: Produces large-growing fresh green body with relatively short slightly curved spines. The flowers of are truly beautiful white and nocturnal.
• Echinopsis mamillosa var. flexilis Rausch: Produces long white or pink flowers, plants sometimes with longer centralspines.
• Echinopsis mamillosa var. kermesina (Krainz) Friedrich: The variety "kermesina" differs from the white-flowerd Echinopsis mammillosa for the pink to carmine coloured flowers.
• Echinopsis mamillosa subs. silvatica (F.Ritter) P.J.Braun & Esteves: The subspecies 'silvatica' sometimes reaches 30cm high, and the majority of spines are straight.