Mammillaria grahamii Engelm.
  • Proc. Amer. Acad. Arts
  • Arizona fishhook cactus, Graham’s fishhook cactus, Graham’s nipple cactus


Cite taxon page as 'WFO (2021): Mammillaria grahamii Engelm. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0001287090. Accessed on: 17 Oct 2021'

General Information

Plants branched or unbranched; branches 0-9(-17). Roots diffuse; upper portion not enlarged. Stems spheric to cylindric, usually (4-)5-16(-30) × (2.3-)3.5-6.8 cm, firm; tubercles 4.8-12(-15) × 3.5-7 mm; axils appearing naked; cortex and pith not mucilaginous; latex absent. Spines (19-)26-33(-38) per areole, glabrous; radial spines 17-35 per areole whitish or pale tan, bristlelike, 6-12 × 0.1-0.15 mm, stiff; central spines (2-)3-4 per areole, 1-3(-4) spines at least hooked (uncommonly 0 hooked), reddish to purplish brown to almost black (rarely golden brown), abaxial 1 porrect, others inconspicuous, appressed against radial spines, hookless porrect spines (3-)9.5-25 × 0.1-0.5 mm; subcentral spines 1-3 per areole, adaxial to central spines, sometimes transitional to central spines, usually straight and barely distinguishable from radial spines. Flowers ca. 2 × 1.8-3.5(-4.5) cm; outermost tepal margins minutely fringed; inner tepals bright rose-pink or rose-purple, 10-16 × 4-8 mm; stigma lobes yellow-green to green, 3-7 mm. Fruits green, turning bright red, scarlet, or carmine (rarely yellowish), elongating until clavate after color change to red is complete, 12-29 × 5-8 mm, juicy only in fruit walls; floral remnant persistent. Seeds black, 0.8-1 × 0.7-0.9 mm, pitted; testa hard, brittle; anticlinal cell walls straight; interstices conspicuously wider than pit diameters; pits bowl-shaped. 2n = 22.

  • Provided by: [B].Flora of North America @ efloras.org
    • Source: [
    • 1
    • ]. 

    Other Local Names

    NameLanguageCountry
    Arizona fishhook cactus, Graham’s fishhook cactus, Graham’s nipple cactus

     Information From

    Cactaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Flora of North America @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=1
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).
    International Union for Conservation of Nature v.3
    https://www.iucnredlist.org/
    IUCN 2019. The IUCN Red List of Threatened Species. Version 2019-1.
    • D See IUCN Terms and conditions of use http://www.iucnredlist.org/info/terms-of-use
    International Union for Conservation of Nature
    https://www.iucn.org/
    IUCN 2016. IUCN Red List of Threatened Species. Version 2016-2
    • E All Rights Reserved