Subspecies, varieties, forms and cultivars of plants belonging to the Mammillaria haageana group

• Mammillaria haageana Pfeiff.: Solitary or clustering, it has stems 5-10 cm in diameter, and deep magenta-pink to
  pale pink flowers to 15 mm in diameter; Distribution: Puebla, Mexico, Veracruz, Morelos, and Oaxaca.
• Mammillaria haageana subs. acultzingensis (Lizen et al.) D.R.Hunt: It is usually solitary, has stems less than 10 cm in diameter, and deep carmine red flowers to 22 mm in
  diameter; Distribution: Acultzingo, Veracruz.
• Mammillaria haageana subs. conspicua (J.A.Purpus) D.R.Hunt: It is often solitary and has stems 10-11 cm in diameter; Distribution: Puebla, Oaxaca, and Morelos.
• Mammillaria haageana subs. elegans D.R.Hunt: It is solitary, has stems 5-8 cm in diameter, and rose red flowers; Distribution: it is found in open, grassy areas in Puebla.
• Mammillaria haageana subs. meissneri (Ehrenb.) U.Guzmán: = Mammillaria haageana subsp. schmollii
• Mammillaria haageana subs. san-angelensis (Sánchez-Mej.) D.R.Hunt: It is usually solitary, has stems 4-7 cm in diameter, and pink to carmine red flowers; Distribution: It is found in the valley of Mexico.
• Mammillaria haageana subs. schmollii (R.T.Craig) D.R.Hunt: It has narrower stems and reddish brown to black spines; Distribution: Mitla, Oaxaca.