Origin and Habitat: Central Mexico, Queretaro (Typical locality: Cadereyta de Montes)
Habitat: On hills between rocks in humus soil on the limestone slopes. Altitude 1700-1330 m

• Mammillaria cadereytensis R.T.Craig
• Mammillaria parkinsonii var. cadereytensis (R.T.Craig) Rogoz. & Plein
• Neomammillaria cadereytensis (R.T.Craig) Y.Itô

• Mammillaria parkinsonii Ehrenb.
• Cactus parkinsonii (Ehrenb.) Kuntze
• Neomammillaria parkinsonii (Ehrenb.) Britton & Rose
• Mammillaria auriareolis Tiegel
• Mammillaria cadereytensis R.T.Craig
• Mammillaria parkinsonii var. cadereytensis (R.T.Craig) Rogoz. & Plein
• Neomammillaria cadereytensis (R.T.Craig) Y.Itô
• Mammillaria cadereytensis var. quadrispina R.T.Craig
• Neomammillaria cadereytensis var. quadrispina (R.T.Craig) Y.Itô
• Mammillaria morganiana Tiegel
• Mammillaria neocrucigera Backeb.
• Mammillaria crucigera var. sensu Boed. non Mart.
• Mammillaria pseudocrucigera Boed.
• Mammillaria parkinsonii var. brevispina R.T.Craig
• Neomammillaria parkinsonii var. brevispina (R.T.Craig) Y.Itô
• Mammillaria parkinsonii subs. dietrichii (Tiegel) Backeb.
• Mammillaria dietrichiae Tiegel
• Mammillaria rosensis R.T.Craig
• Neomammillaria rosensis (R.T.Craig) Y.Itô

Description: Simple or dichotomicously branched (occasionally ramifies , producing a few basal shoots) with short dense spines and wools.
Stem: Symmetrically globose at first, later cylindrical, with a depressed apex that appears completely white. Up to 12 cm tall, dull green and may, with age, become rubberized at its base. With latex.
Tubercles: Short cylindrical/conical firm, 6-7 mm long and 2 mm wide, arranged in numerous, very close-set spirals. The Axil is woolly with bristles in the floriferous portion.
Areoles: Oval and woolly when young.
Roots: Fibrous.
Radial spines: up to 30, short, 3-5 mm long, acicular, straight, somewhat horizontal radiating and arranged laterally on each side of the tubercle, white.
Central spines: 4-6 up to 1 cm long, subulated, rigid, divergent, one pointing upwards and often longer, smooth, thicker at base, they are reddish with a darker tip.
Flowers: Small, funnelform, 10-12 mm long and in diameter, yellowish with darker reddish midstripe.
Fruits: Attractively deep dull pinkish-red coloured. Club-shaped, 10-15 mm long and 2-3 mm wide.
Seeds: Pear-shaped, reddish-brown.

Notes: There is a lot a confusion about this species, hunt and Anderson consider it a form of Mammillaria perbellaSN|20725]]SN|20707]] which forms dense clumps by dichotomous division, but it is clearly evident from the photos showed in the original description by Craig that they are not exactly the same. The M. cadereytensis is actually considered (Pilbeam) a short spined variant of Mammillaria parkinsoniiSN|20707]]SN|20725]].

Cultivation and Propagation: This plant is easy to cultivate but very slow growing. Cultivate it in a well drained and mineral substratum. Water regularly, avoid the use of peat or other humus sources in the potting mixture. It need full sun, so it keep a compact and flat shape. It does not tolerate intense cold, but tolerates some cold if kept dry. Frequent transplantations of the young plants protect the lower part of the stem from the lignification, to which the plant has a tendency.
Reproduction: It is propagated by seed. Sometimes old plants divide at their apex, ramifying dichotomously - to form two or more distinct joints - but the removal of one of these joints may prove fatal to the plant.