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Mammillaria petrophila ssp petrophila

  • First description by K. Brandegee, Zoe 5: 193 (1904)

  • Body: Plants solitary, later clustering randomly. Stems depressed globose to short cylindrical, gray-green, to 15 cm (5.9 in) high and in diameter.
  • Roots:
  • Sap: With latex.
  • Tubercule arrangement: 8 – 13
  • Tubercule: Short, angled, conical.
  • Axil: With dense white wool.
  • Radial spine: About 10, slender, stiff, needle-like, dark chesnut-brown, 10 – 15 mm (0.4 – 0.6 in) long.
  • Central spine: 1 – 2, dark brown to 20 mm (0.8 in) long.
  • Flower: Bright greenish yellow, to 20 mm (0.8 in) long and in diameter. Stigmas greenish yellow.
  • Fruit: Red, small, roundish.
  • Seed: Reddish brown.
  • Flowering period in Cultivation (Europe):
  • Minimum temperature:
  • Habitat Substrate: Steep coastal hillside.
  • Geographic Distribution: Baja California Sur, Mexico. Altitude from sea level to 1.800 m.
  • Comments: A somewhat variable species that will slowly increase in size to form a moderately sized sphere to short column. With time, some plants offset to form clumps. Care with watering is needed; too much may make the plant prone to root rot. A freely draining potting mix will help. Temperature levels also should be higher than for most Mammillaria to encourage flowering.
  • Bibliography:
    John Pilbeam (1999) – Mammillaria The Cactus File Handbook – page 221.

    Edward F. Anderson (2001) – The Cactus Family – page 436.
  • Synonymes:
    M. gatesii

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petrophila ssp petrophila


Mammillaria Petrophila/Mammillaria petrophila ssp petrophila – Photo Norman Dennis.jpg


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