Subspecies, varieties, forms and cultivars of plants belonging to the Echinocactus grusonii group

• Echinocactus grusonii Hildm.: It produces slowly growing barrel-shaped stem up to 90 cm (180 cm) in height and spread. The stem is pale green and heavily ribbed with very numerous areoles and golden yellow spines.
• Echinocactus grusonii var. albispinus Y.Itô: It looks just like a regular "Golden Barrel" but the spines are glassy-white instead of yellow.
• Echinocactus grusonii var. albispinus f. cristatus hort.: crested form with spines all white instead of yellow.
• Echinocactus grusonii f. cristatus hort.: This is a wavy crested form with golden-yellow spines. It can also get very big making a spectacular specimen.
• Echinocactus grusonii var. intermedius hort.: This plant differs from the common Golden Barrel Cactus for the spines that are stout but intermediate in length between the standard from and the short spined type "subinermis" (syn: brevispinus).
• Echinocactus grusonii var. intermedius f. cristatus hort.: Strong crested form with stout spines that are intermediate in length between the standard from and the short spined type "subinermis" (syn. brevispinus).
• Echinocactus grusonii var. intermedius f. variegatus hort.: Yellow and green, variegated plants with short, spines that are intermediate in length between the standard from and the short spined type "subinermis" (syn. brevispinus).
• Echinocactus grusonii var. intertextus Y.Itô: (a.k.a "Krauskopf" or "tortulispinus") This plant differs from the common Golden barrel cactus for the spines, that are yellowish-white, sparse, flattish, curved to almost crinkled backward and very irregular, 2 to 6 cm long.
• Echinocactus grusonii var. intertextus f. cristatus hort.: Crested form with characteristich curved spines, that are flattish, almost crinkled backward and very irregular.
• Echinocactus grusonii f. monstruosus cristatus hort.: Crested form of the mostrose cultivar covered by white wool with short yellow spines. The crests are quite unstable
• Echinocactus grusonii f. monstruosus hort.: Free offsetting small form covered by yellowhish-white wool with short yellow spines. The rib structure is not yet apparent, and they have pronounced tubercles making them look superficially like Mammillarias.
• Echinocactus grusonii var. setispinus f. minor cristatus hort.: This is the tiniest crested form. A dwarf form covered by touch friendly spines and looking quite dissimilar to the standard species.
• Echinocactus grusonii var. setispinus f. minor mostruosus cristatus cv. Scarascia: The plant forms lots of tiny monstrous wooly heads, that time by time begin to crest.
• Echinocactus grusonii f. setispinus hort.: This cultivar has very thin acicular spines, that become longer as the plant ages.
• Echinocactus grusonii var. subinermis Y.Itô: (a.k.a. "cv. TOGENASHI KINSHACHI", "inermis" or "brevispinus") This is very short spined mutantant. Except for the spines it is identical in shape and size to the standard species.
• Echinocactus grusonii var. subinermis f. cristata hort.: This is the crested form of the short-spined Golden Barrel. This crest can also get very large