First Description: Allg. Gartenz. 17: 242. 1849
Body: Solitary or clumping, globose, later becoming cylindrical at age, 60 - 220 mm high and 60 - 100 mm in diameter, with sunken apex, dull green.
Sap: With latex.
Tubercle: Pyramidical, often keeled, medium set, 12 - 14 mm long and 7 - 11 mm thick with oblique rounded tips. Areoles are round,sunken, 2,5 mm in diameter with some white wool at first, later becoming naked.
Axils: With white wool and sometimes bristles.
Radial spines: 4 - 7, 3 - 10 mm long, radiating, straight, glatt, glassy white to yellowish with darker tips.
Central spines: 1, 7 - 22 mm long, thicker than the radials, straight or somewhat curved, glassy white to glassy yellow, base and tips are brown.
Flowers: Funnelform, 18 - 22 mm long and wide, pinkish with darker midveins.
Fruit: Club shaped with flower rest, pink to karmine with whitish base, 15 - 25 mm long and 3 - 5 mm wide, ripens 12 months after flowering.
Seed: Brown, drop to kidney shaped, 1 mm long and 0,8 mm wide; Hilum subbasal and small; Selfsterile.
Geographic Distribution: South of Puebla ( Chiautla) and In the north of Oaxaca. Altitude between 500 - 1900 meter. Growing on brown silicat rocks in black humus and moss.
Bibliography: Reppenhagen, die Gattung Mammillaria: 313, page 776.