Origin and Habitat: Garden origin.

• Aztekium ritterii f. montruosa hort.

• Aztekium ritteri Boed.
• Echinocactus ritteri Boed.
• Aztekium ritterii f. cristatum hort.
• Aztekium ritterii f. montruosa hort.
• Aztekium ritterii f. senilis hort.

Description: The typical Aztekium ritteriSN|4248]]SN|4248]]i is a very flat geophyte cactus that seldom exceeding 5 cm in diameter and rather less in height, with 9 to 11 rounded ribs, these are in turn crossed by numerous horizontal furrows. Between these true ribs are small secondary ribs, reaching about halfway up the plant body. The colour of the younger growth is a rather pale yellowish green, merging to grey-green on the lower, older growth. The centre of the cactus contains a lot of white wool.
Forma monstruosa: The monstrous form (Aztekium ritteriSN|4248]]SN|4248]]i f. montruosa) is an odd plant that forms bumped shapes,the epidermis is grey-green and contrasts with the white areoles and new pale yellowish green growth, and it is possible to find clones with different degrees of monstrosity or deformity. Maybe we can call it a freak? Despite to its beauty it is still very rare and sought after by collectors, for its unique features.
Habit: It is a highly branching cactus that forms densely packaged clumps.

Cultivation and Propagation: It’s relatively easy to cultivate plant, but very slow growing. A 10 -30% of natural gypsum could be added to a very well drained soil. Watering should be rather infrequent, but abundant, so that the soil becomes completely soaked. Furthermore it has a swollen juicy root system, and watering it properly is often difficult and rot if over-watered. Keep dry in winter, or when night temperatures remain below 10° C. It is hardy to -4°C for a short period. Assure a good ventilation.
Exposures: Part sun.
Reproduction: Grafting or cuttings.