Mammillarias.net

Mammillaria muehlenpfordtii

First description by Foerster, Allg. Gartenz. 15: 49 (1847)

Body: Plants usually solitary, sometimes branching dichotomously. Stems globose, massive, blue-green to gray-green, 12 - 15 cm (4.7 - 5.9 in) in diameter.

Roots:

Sap: Without latex.

Tubercule arrangement: 13 - 21

Tubercule: Conical.

Axil: With white bristles.

Radial spine: 30 - 50, glassy white or yellowish, bristle like, radiating, nearly covering the body, to 4 mm long.

Central spine: 4, rarely 2 - 6, pointing outward, brownish yellow, becoming gray with brown tips, extremely variable in lenght, 2 - 40 mm (to 1.6 in) lowermost longest.

Flower: Carmine red, 10 - 15 mm (0.4 - 0.6 in) long.

Fruit: Red.

Seed: Brown.

Flowering period in Cultivation (Europe):

Minimum temperature: -4? C.

Habitat Substrate:

Geographic Distribution: Queretaro, Guanajuato and San Luis Potosi, Mexico. Altitude 1.700 - 2.400 m.

Comments: A rapid grower in comparison to other spherical species, the plant will increase the number of heads by dichotomous division. Large clumps can be produced in a few years. No special cultural requirements.

Bibliography:
John Pilbeam (1999) - Mammillaria The Cactus File Handbook - page 198.
Edward F. Anderson (2001) - The Cactus Family - page 433.

Synonymes:
M. celsiana (?)
M. neopotosina