: Durango, Mexico.
Altitude range: 1.000-1.700 metres above sea level.
Habitat and ecology: Mammillaria nazasensis grows on steep rocks in crevices, sometimes growing together with Mammillaria guelozwiana, Echinocereus stramineusSN|7817]]SN|7817]], Opuntia herrfeldtii, Opuntia robustaSN|32724]]SN|32724]], and Opuntia imbricata.

• Mammillaria nazasensis (Glass & R.A.Foster) Repp.
• Escobariopsis pennispinosa subs. nazasensis (Glass & R.A.Foster) Doweld
• Mammillaria pennispinosa subs. nazasensis (Glass & R.A.Foster) D.R.Hunt
• Mammillaria pennispinosa var. nazasensis Glass & R.A.Foster

• Mammillaria mercadensis (Britton & Rose) Patoni
• Chilita mercadensis (Britton & Rose) Orcutt
• Ebnerella mercadensis (Patoni) Buxb.
• Escobariopsis mercadensis (Patoni) Doweld
• Neomammillaria mercadensis Britton & Rose
• Mammillaria berkiana A.B.Lau
• Mammillaria flavihamata Backeb.
• Mammillaria nazasensis (Glass & R.A.Foster) Repp.
• Escobariopsis pennispinosa subs. nazasensis (Glass & R.A.Foster) Doweld
• Mammillaria pennispinosa subs. nazasensis (Glass & R.A.Foster) D.R.Hunt
• Mammillaria pennispinosa var. nazasensis Glass & R.A.Foster
• Mammillaria ocamponis Ochot.
• Mammillaria posseltiana Boed.
• Chilita posseltiana (Boed.) Buxb.
• Ebnerella posseltiana (Boed.) Buxb.
• Mammillaria rettigiana Boed.
• Chilita rettigiana (Boed.) Buxb.
• Ebnerella rettigiana (Boed.) Buxb.
• Escobariopsis rettigiana (Boed.) Doweld
• Neomammillaria rettigiana (Boed.) Y.Itô
• Mammillaria sinistrohamata Boed.
• Chilita sinistrohamata (Boed.) Buxb.
• Ebnerella sinistrohamata (Boed.) Buxb.

: Mammillaria nazasensisSN|9294]]SN|9295]], more often found as Mammillaria pennispinosa var. nazasensisSN|9295]]SN|9294]], is a particularly attractive small spherical, perennial cactus usually solitary or forming clumps (clustering readily in cultivation) and bearing creamy-yellow to orange tan spines, discolouring with age. Has cream yellow flowers with faint pinkish tan midstripe in spring.
Stem: Plants solitary , flattened globose to globose, olive green to dark green, to 2.5 - 3.5 cm in diameter.
Tubercles: Axil naked.
Radial spines: 16 - 19 (to 22), fine, white and very pubescent.
Central spines: 4, of which 1 is strongly hooked, strongly pubescent, pale whitish yellow to lemon yellow to orange tan.
Flowers: Pale cream yellow with faint pinkish tan midstripe, 15 mm long and in diameter, stigmas pale greenish yellow to cream-white.
Bloom Season: Early Spring through late Spring.
Fruits: Red.
Seeds: Black.

: Major references and further lectures.
1) Robert T. Craig “The Mammillaria handbook: with descriptions, illustrations, and key to the species of the genus Mammillaria of the Cactaceae” E P Publishing, 1945
2) John Pilbeam “Mammillaria The Cactus File Handbook” Cirio Pub. Services, 01/Dec/1999Edward Anderson “The Cactus family” Timber Press, Incorporated, 2001
3) James Cullen, Sabina G. Knees, H. Suzanne Cubey "The European Garden Flora Flowering Plants: A Manual for the Identification of Plants Cultivated in Europe, Both Out-of-Doors and Under Glass" Cambridge University Press, 11/Aug/2011
4) David R Hunt; Nigel P Taylor; Graham Charles; International Cactaceae Systematics Group. "The New Cactus Lexicon" dh books, 2006

: Mammillaria nazasensisSN|9295]]SN|9295]] requires excellent drainage provided by porous cactus soil (With not less than 50% grit content). We suggest repotting every 2-3 years. Prefers bright light and ample airflow. Outside full sun or afternoon shade, inside it needs bright light, and some direct sun. Water should be carefully applied and only when the soil is dry to the touch, as fits this cliff-dwelling species. Allow soil to drain thoroughly before watering again. Do not water in the winter (Rot prone). Protect from frost. But it's hardy to -5°C if kept dry. During the beautiful season enrich the soil using a fertilizer rich in potassium and phosphorous, but poor in nitrogen, because this chemical element doesn’t help the development of succulent plants, making them too soft and full of water. This rarely found species is slow growing, but rewards the patient grower with displays of small dark pink flowers. Winter rest is important to stimulate flowering. Use small sized pots.
Propagation: Direct sow after last frost or cuttings.