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

• Mammillaria heyderi Muehlenpf.: It has 1 central spine and 15-22 radial spines; Flowers are cream coloured with brownish-greenish mid-veins.
• Mammillaria heyderi var. applanata (Engelm.) Engelm.: It is often the flattest but otherwise very similar to the The ssp. heyderi and may probably repesent only a race of the same species.
• Mammillaria heyderi subs. gaumeri (Britton & Rose) D.R.Hunt: It has one central spine and 10-12 radial spines; Flowers are plain creamy-white.
• Mammillaria heyderi subs. gummifera (Engelm.) D.R.Hunt: It has 1-2 central spines and 10-12 radial spines: Flowers are reddish-white with darker midviens.
• Mammillaria heyderi subs. hemisphaerica (Engelm.) D.R.Hunt: It has 1 central spine and 9-13 radial spines; Flowers are Cream-colored to dusty pink.
• Mammillaria heyderi subs. macdougalii (Rose in L.H.Bailey) D.R.Hunt: It has 1-2 central spines which are stouter and 10-12 radials spines; Flowers are cream-colored to pale yellow.
• Mammillaria heyderi subs. meiacantha (Engelm.) D.R.Hunt: It has one to none central spines and 5-9 radial spines; Flowers are pink or white with pink mid-viens.