Species Description – Result


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Mammillaria johnstonii

  • First description by Britton & Rose, Cact. 4: 80 (1923)

  • Body: Plants usually solitary but occasionally clustering basally. Stems globose to short cylindrical, dull bluish gray-green, 15 – 20 cm (5.9 – 7.9 in) high.
  • Roots:
  • Sap: With latex.
  • Tubercule arrangement: 13 – 21
  • Tubercule: Tubercules four-angled.
  • Axil: Naked.
  • Radial spine: 10 – 14, stiff, needle-like, white with brown tips, 6 – 9 mm (0.2 – 0.4 in) long.
  • Central spine: 2, rarely 4 – 6, bluish brown, straight, one erect, others diverging, 10 – 25 mm (0.4 – 1 in) long.
  • Flower: White, to pale pink to cream, with pink to brownish midveins, to 20 mm (0.8 in) in diameter. Stigmas olive-green.
  • Fruit: Globose, swollen, scarlet.
  • Seed: Brown.
  • Flowering period in Cultivation (Europe):
  • Minimum temperature:
  • Habitat Substrate: Steep, rocky hills
  • Geographic Distribution: San Carlos Bay, Sonora, Mexico. Altitude up to 50 m.
  • Comments: Fairly slow growing, and average in its cultural requirements. May be more frost tender than most Mammillaria, and flowering benefits from higher average temperatures than most species.
  • Bibliography:
    John Pilbeam (1999) – Mammillaria The Cactus File Handbook – page 151.

    Edward F. Anderson (2001) – The Cactus Family – page 424.
  • Synonymes:
    M. johnstonii var guaymensis

    M. johnstonii var sancarlensis

Pictures

Picture in the galery related to the keyword :

johnstonii


Mammillaria Johnstonii/Mammillaria johnstonii (SB432) – Photo Josef Matousek.jpg


Mammillaria Johnstonii/Mammillaria johnstonii (syn. M. johnstonii var. sancarlensis) – Origine Beugin – Photo Francois.jpg


Mammillaria Johnstonii/Mammillaria johnstonii – ML 734 – Photo Michel Lacoste.jpg


Mammillaria Johnstonii/Mammillaria johnstonii – ML 735 – Photo Michel Lacoste.jpg


Mammillaria Johnstonii/Mammillaria johnstonii – ML 736 – Photo Michel Lacoste.jpg


Mammillaria Johnstonii/Mammillaria johnstonii – ML 737 – Photo Michel Lacoste.jpg


Mammillaria Johnstonii/Mammillaria johnstonii – ML 738 – Photo Michel Lacoste.jpg


Mammillaria Johnstonii/Mammillaria johnstonii – ML 739 – Photo Michel Lacoste.jpg


Mammillaria Johnstonii/Mammillaria johnstonii – ML 740 – Photo Michel Lacoste.jpg


Mammillaria Johnstonii/Mammillaria johnstonii – ML 741 – Photo Michel Lacoste.jpg


Mammillaria Johnstonii/Mammillaria johnstonii – Photo Norman Dennis.jpg


Maps Distribution/Mammillaria johnstonii – distribution map.gif