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Cactus bispinus J.M.Coult.
Contr. U.S. Natl. Herb. 3: 101. 1894 Remarks: nom. nov. for Mammillaris microthele Muhlenph. non Lemaire
Family: CACTACEAE

Accepted Scientific Name: Mammillaria formosa subs. microthele (Muehlenpf.) D.R.Hunt
Mammillaria Postscripts 6: 9 (1997)

Cactus bispinus (Mammillaria formosa subs. microthele) Photo by: Valentino Vallicelli

Synonyms:

See all synonyms of Mammillaria formosa
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Accepted name in llifle Database:
Mammillaria formosa Galeotti ex Scheidw.
Bull. Acad. Roy. Sci. Bruxelles v. (1838) 497 [et: Allg. Gartenzeitung (Otto & Dietrich) 12: 186. 1844 ]
Synonymy: 7 Accepted name in llifle Database:
Mammillaria formosa subs. chionocephala (J.A.Purpus) D.R.Hunt
Mammillaria Postscripts 7: 3 (1998)
Synonymy: 10 Accepted name in llifle Database:
Mammillaria formosa subs. microthele (Muehlenpf.) D.R.Hunt
Mammillaria Postscripts 6: 9 (1997)
Synonymy: 8 Accepted name in llifle Database:
Mammillaria formosa subs. pseudocrucigera (R.T.Craig) D.R.Hunt
Mammillaria Postscripts 6: 10 (1997)
Synonymy: 2
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Common Names include:
SPANISH (Español): Cabeza blanca

Subspecies, varieties, forms and cultivars of plants belonging to the Mammillaria formosa group

  • Mammillaria formosa Galeotti ex Scheidw.: has pale pink flowers and 20-22 white radial spines. Distribution: Coahuila, Aguascalientes, Guanajuato, Zacatecas, Tamaulipas, Nuevo Leon, and San Luis Potosi.
  • Mammillaria formosa subs. chionocephala (J.A.Purpus) D.R.Hunt: is typically wrapped on the upper part with a dense snow-white wool, so that only the tips of the tubercles visible. Distribution: Highlands of central Mexico (Coahuila, Nuevo Leon, and Durango).
  • Mammillaria formosa subs. microthele (Muehlenpf.) D.R.Hunt: has nearly pure white flowers and 22-24 flattened and bristle-like radials. Description: Coahuila, Guanajuato, Tamaulipas, and San Luis Potosi.
  • Mammillaria formosa subs. microthele var. superfina hort.: it is a particular nice selected form with very small tubercles and spines.
  • Mammillaria formosa subs. pseudocrucigera (R.T.Craig) D.R.Hunt: has distinctly pink flowers with white margins and only 18 radials, often lacking on mature areoles. Distribution: Queretaro and Guanajuato.


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