Mammillaria heyderi Muehlenpf.
  • Allg. Gartenzeitung
  • Little nipple cactus

Cite taxon page as 'WFO (2021): Mammillaria heyderi Muehlenpf. Published on the Internet; Accessed on: 17 Oct 2021'

General Information

Plants unbranched, protruding relatively little above soil. Roots obconic taproots; secondary roots diffuse. Stems top-shaped, flat-topped (aerial part sometimes hemispheric in old age or in dense subtropical vegetation), protruding above ground 0-2 × (4-)7.5-15 cm, firm; tubercles 9-15(-20) × 3-7 mm; axils with short wool, bristles absent; cortex and pith not mucilaginous; latex abundant in healthy tissue throughout cortex of stem, tubercles, and sometimes flower receptacle, sticky, white. Spines (8-)10-18(-27) per areole, usually brownish, darker at tip, glabrous; radial spines (8-)10-22(-26) per areole, white to white-and-brown or brown , needlelike, 6-15(-16) mm, stiff, abaxial spines longest; central spines (0-)1(-4) per areole, porrect or ascending, not hooked, (0.5-)2-8 × 0.15-0.45 mm; subcentral spines 0. Flowers 1.9-3.8 × 1.5-3 cm; outermost tepal margins entire; inner tepals white, greenish or cream to pale pink, with tan, pink, greenish, or brownish midstripes, 11-19 × 2-2.5 mm; stigma lobes externally green, internally green or red (or pink), 2.5-3 mm. Fruits brilliant red: scarlet, carmine, or crimson, obovoid to clavate, 10-35(-40) × 5-8 mm, juicy only in fruit walls; floral remnant weakly persistent. Seeds reddish brown, sometimes yellowish when fresh, 1-1.2 mm, deeply pitted; testa thin, relatively flexible; anticlinal cell walls sinuate, interstices narrower than pit diameters; pits cavernous or deeply concave. 2n = 22.

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

    Other Local Names

    Little nipple cactus

     Information From

    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Flora of North America @
    'Flora of North America @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    World Flora Online consortium
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).
    International Union for Conservation of Nature
    IUCN 2016. IUCN Red List of Threatened Species. Version 2016-2
    • D All Rights Reserved
    International Union for Conservation of Nature v.3
    IUCN 2019. The IUCN Red List of Threatened Species. Version 2019-1.
    • E See IUCN Terms and conditions of use