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

• Mammillaria buchenaui Backeb.
• Mammillaria crucigera Mart.: Almost always divides dichotomously. It has 4-5 yellowish or brown central spines, and 22-30 radials. Distribution: Puebla and Oaxaca border, Mexico
• Mammillaria crucigera var. grandinosa Lizen et al.
• Mammillaria crucigera subs. tlalocii (Repp.) D.R.Hunt: forms simple columns (usually) without offsetting, has 0-2(-4) whitish or blackish central spines, and 16-22 radials. Distribution: Puebla and Oaxaca border, Mexico
• Mammillaria crucigera subs. tlalocii f. caespitosa hort.: It is a nice horticultural form that branch freely from the base and forms soon nice clumps.
• Mammillaria crucigera subs. tlalocii f. cristata hort.: crested form.