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General: Flat, straight ribs with tubercles, green hard body with a wavy texture. Spines few, short and corky, easily falling off from older areoles. Woolly apex as adult plant. Small white (A ritterii) to magenta (A hintonii) flowers.
Growing: Full sun, well drained potting mix. Winter temp 5-10 C. Very slow growing. Flowering sized plants appr. 15mm across (>5 years).
Habitat: Mexico
Copyright Mats Winberg