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Species

Mammillaria elongata

Mammillaria elongata

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Accepted name, 58 synonyms, Guanajuato-to-Veracruz range, infraspecific source disagreement, and Least Concern status of Mammillaria elongata.

Scientific taxonomy article

Accepted name and publication history

The current Kew backbone accepts Mammillaria elongata; the standardized author citation is DC. Augustin Pyramus de Candolle published the species in 1828 in Mémoires du Muséum d’Histoire Naturelle 17: 109. IPNI supplies nomenclatural authorship and place of publication, while current acceptance, synonymy, and native distribution follow POWO.12

The name was published directly in Mammillaria and has no separate basionym. Across nearly two centuries of use, the species was treated under multiple genera, forms, varieties, and a subspecies name; the current Kew backbone unites that history as 58 synonyms.

Taxon boundary and infraspecific treatment

In the Kaktüs Doktoru backbone, the species is a child of Mammillaria. POWO treats Mammillaria elongata subsp. echinaria as a synonym at the current species node, whereas WFO displays subsp. echinaria and the nominal subspecies as included subspecies. The payload follows the POWO synonym backbone while preserving the source-opinion difference in metadata. This package updates only the canonical species node and its linked botanical-dictionary record; it does not rewrite the genus, flatten accepted subordinate ranks into species synonymy, or alter the product.

Diagnostic characters

The species is recognized by elongated finger-like stems that offset freely into dense clusters, a close radial-spine cover on distinct tubercles, and spine tones that can range from yellow to brown. Stem length, clustering, and spine colour vary widely in cultivation. Members of Mammillaria have distinct tubercles rather than continuous ribs, and flowers generally arise from reproductive areoles in the tubercle axils. Identification should not be reduced to one spine colour or a commercial photograph; tubercles, areoles, spines, flowers, fruits, and provenance should be assessed together.3

Phylogenetic context

A 2021 molecular study showed that the traditional broad concept of Mammillaria was not a single natural lineage and that generic limits within the mammilloid clade required reassessment.4 The current Kew backbone nevertheless accepts this species in Mammillaria. Phylogenetic context does not automatically rename the accepted species; it explains why historical generic combinations and appearance-based groupings must be checked against a maintained backbone.

Native distribution and conservation

Kew records the native range as Mexico from Guanajuato to Veracruz.1 POWO records the species as a succulent subshrub of desert and dry-shrubland biomes and notes an introduced occurrence in Spain. Introduced records must not be confused with the native range. The stored conservation category is LC.5 The IUCN assessment assigns Least Concern. Widespread cultivation and LC status do not remove the need to protect habitat and document legal nursery provenance.

Synonymy and retrieval

Kew accepts 58 synonyms at the species node: Six homotypic generic combinations and 52 heterotypic names cover historical treatments around echinaria, densa, stella-aurata, subcrocea, and tenuis at form, variety, and subspecies rank. These are not canonical routes; they document nomenclatural history and support retrieval of older literature. Commercial names such as “Copper King” or “Ladyfinger” and selected spine colours are not scientific synonyms unless present in the maintained backbone.1

References

  1. Plants of the World Online. “Mammillaria elongata DC.” Royal Botanic Gardens, Kew. Accessed: 2026-08-04. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:134532-1 ↩
  2. International Plant Names Index. “Mammillaria elongata DC.” Accessed: 2026-08-04. https://www.ipni.org/n/134532-1 ↩
  3. World Flora Online. “Mammillaria elongata DC.” Accessed: 2026-08-04. https://www.worldfloraonline.org/taxon/wfo-0001288776 ↩
  4. Breslin, P. B., Wojciechowski, M. F. & Majure, L. C. “Phylogenetic relationships within Mammillaria (Cactaceae) and implications for the circumscription of the genus.” Taxon 70(2): 308–323. https://doi.org/10.1002/tax.12451 ↩
  5. IUCN Red List of Threatened Species. “Mammillaria elongata.” https://www.iucnredlist.org/species/152742/121546911 ↩

Plants In This Group

Mammillaria elongata

Mammillaria elongata

Mammillaria elongata

Mammillaria elongata is a variable Mexican species native from Guanajuato to Veracruz whose finger like stems offset freely into dense clusters. The species is recognized by elongated finger like stems that offset freely into dense clusters, a close radial spine cover on distinct tubercles, and spine tones that can range from yellow to brown. Stem length, clustering, and spine colour vary widely in cultivation. Unlike the taxonomy article, the botanical dictionary layer explains the living plant's morphology, habitat context, and cultivation requirements.