Subspecies, varieties, forms and cultivars of plants belonging to the Copiapoa hypogea group

• Copiapoa hypogaea F.Ritter: has partially underground stems 3-4 cm in diameter, connected though a narrow region to the tuberous-napiform root. Distribution: Chañaral. N. Chile.
• Copiapoa hypogaea var. barquitensis F.Ritter: This is the form of Copiapoa hypogaea with smooth epidermis. It is the more familiar in the collections. Distribution: neighbours of Chañaral (in the south part of its range)
• Copiapoa hypogaea var. barquitensis f. cristata hort.
• Copiapoa hypogaea subs. cobrensis Doweld
• Copiapoa hypogaea cv. Lizard Skin: This is the form of Copiapoa hypogaea distinguished by a very peculiar epidermis of the colour and texture of a lizard. Distribution: Chanaral (Coastal Chile, 02 Antofagasta), at north of the town.
• Copiapoa laui Diers: (Copiapoa hypogea var. laui) is the smallest species in the genus. Stems 1(-3) cm in diameter, 1 to 1.5 cm high, clear grey to red-brown-grey. Distribution: Esmeralda, N. Chile.
• Copiapoa laui f. cristata