Species Description – Result


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Mammillaria grahamii

  • First description by Engelmann, Proc. Amer. Acad. 3: 262 (1856)

  • Body: Plants solitary or branching basally. Stems globose to short cylindrical, light green, 7 – 20 cm (2.8 – 7.9 in) or more high, 7.5 – 11 cm (3 – 4.3 in) in diameter.
  • Roots: Thickened.
  • Sap: Without latex.
  • Tubercule arrangement:
  • Tubercule: Ovoid to cylindrical, often four-angled.
  • Axil: Naked.
  • Radial spine: 20 – 35, straight, needle-like, white to light brown to reddish, 6 – 12 mm (0.2 – 0.5 in) long, lateral ones longuest.
  • Central spine: 1 – 4, yellowish brown to dark brown, 12 – 25 mm (0.5 – 1 in) long, the longest one usually hooked.
  • Flower: Pink to lavender pink to reddish purple, sometimes white, 20 – 45 mm in diameter.
  • Fruit: Bright red, 12 – 25 mm (0.5 – 1 in) long.
  • Seed: Black.
  • Flowering period in Cultivation (Europe):
  • Minimum temperature: -10? C.
  • Habitat Substrate:
  • Geographic Distribution: California, Arizona, New Mexico and Texas, USA; Sonora, Sinaloa and Chihuahua, Mexico. Altitude 200 – 1.550 m.
  • Comments: Like almost all of the hooked spined species from the Southwest USA and Baja California, this species challenges the grower to keep it alive and flowering. It is especially sensitive to overwatering. A winter rest that allows the plant to shrivel ? perhaps losing up to 25% of its summer height ? will encourage flowering and long time survival. Be careful to encourage slow growth.
  • Bibliography:
    John Pilbeam (1999) – Mammillaria The Cactus File Handbook – page 115-116.

    Edward F. Anderson (2001) – The Cactus Family – page 419.
  • Synonymes:
    M. grahamii var arizonica

    M. grahamii var oliviae

    M. microcarpa

    M. microcarpa var grahamii

    M. microcarpa var auricarpa

    M. microcarpa var milleri

    M. milleri

    M. oliviae

Pictures

Picture in the galery related to the keyword :

grahamii


Mammillaria Grahamii/Mammillaria grahamii (syn M. microcarpa v auricarpa) – DH635-91 – Photo Aymeric de Barmon.jpg


Mammillaria Grahamii/Mammillaria grahamii (syn M. microcarpa v auricarpa) – Photo Willy.jpg


Mammillaria Grahamii/Mammillaria grahamii (syn. M. microcarpa var. oliviae – Photo Luc.jpg


Mammillaria Grahamii/Mammillaria grahamii (syn. M. microcarpa) SB147 – Photo Hugo De Cock.jpg


Mammillaria Grahamii/Mammillaria grahamii (syn. M. olivae) – Photo Norman Dennis.jpg


Mammillaria Grahamii/Mammillaria grahamii (syn. M. oliviae) – DH565-99 – Photo Aymeric de Barmon.jpg


Mammillaria Grahamii/Mammillaria grahamii (syn. M. oliviae) – Photo Hugo De Cock.jpg


Mammillaria Grahamii/Mammillaria grahamii (syn. M. oliviae) – Photo Franck Martin 1.jpg


Mammillaria Grahamii/Mammillaria grahamii (syn. M. oliviae) – Photo Franck Martin 2.jpg


Mammillaria Grahamii/Mammillaria grahamii – Arizona -Phoenix – Squaw Peak – Paradise Valley – Photo Christophe Blanchy.jpg


Mammillaria Grahamii/Mammillaria grahamii – Photo Norman Dennis 2.jpg


Mammillaria Grahamii/Mammillaria grahamii – Photo Norman Dennis.jpg


Mammillaria Grahamii/Mammillaria grahamii – Photo Willy Bovis.jpg


Mammillaria Grahamii/Mammillaria grahamii – Reddington Pass just E. of Tucson – Arizona – Photo Frank Gibson Breckenridge III.jpg


Mammillaria Grahamii/Mammillaria grahamii – Tucson Mountains, AZ – Photo Norman Dennis.jpg


Mammillaria Grahamii/Mammillaria grahamii in my backyard – Photo Norman Dennis.jpg


Mammillaria Grahamii/Mammillaria grahamii winter habitat, Phoenix, AZ – Photo Dora snyder.jpg


Maps Distribution/Mammillaria grahamii – distribution map.gif