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Species

Mammillaria vetula

Mammillaria vetula

Article summary

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Accepted name, 24 Kew synonyms, POWO–WFO treatment of gracilis, Guanajuato-to-Veracruz range, and LC status of Mammillaria vetula.

Scientific taxonomy article

Accepted name and publication history

The current Kew backbone accepts Mammillaria vetula; the standardized author citation is Mart. Carl Friedrich Philipp von Martius published the name in 1832 in Nova Acta Physico-Medica Academiae Caesareae Leopoldino-Carolinae Naturae Curiosorum 16(1): 338. 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. Kew unites four homotypic combinations and 20 heterotypic names around gracilis, fragilis, pulchella, and magneticola as species synonyms.

Taxon boundary and infraspecific treatment

In the Kaktüs Doktoru backbone, the species is a child of Mammillaria. POWO lists no accepted subordinate rank and synonymizes subsp. gracilis, subsp. lacostei, and subsp. magneticola. The WFO search surface displays subsp. gracilis and the nominal subsp. vetula as included subspecies, and that difference is preserved 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 small tuberculate stems that can offset into clusters, a radial-spine cover ranging from white to yellowish, and small flowers. Cultivated forms around gracilis with fragile, readily detached offsets should not be treated as the complete expression of the species. 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. Freely offsetting cultivated plants should not be confused with the full geographic and morphological variation of wild populations. The stored conservation category is LC.5 The IUCN assessment assigns Least Concern. LC does not make habitat protection or documented legal nursery provenance irrelevant.

Synonymy and retrieval

Kew accepts 24 synonyms at the species node: Four homotypic combinations and 20 heterotypic names cover gracilis, fragilis, pulchella, magneticola, and historical subspecies treatments. These are not canonical routes; they document nomenclatural history and support retrieval of older literature. Selected trade forms such as “Arizona Snowcap” and dense white-spine presentations are not automatically scientific synonyms.1

References

  1. Plants of the World Online. “Mammillaria vetula Mart.” Royal Botanic Gardens, Kew. Accessed: 2026-08-04. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:151836-2 ↩
  2. International Plant Names Index. “Mammillaria vetula Mart.” Accessed: 2026-08-04. https://www.ipni.org/n/151836-2 ↩
  3. World Flora Online. “Mammillaria vetula Mart.” Accessed: 2026-08-04. https://www.worldfloraonline.org/search?query=Mammillaria+vetula ↩
  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 vetula.” https://www.iucnredlist.org/species/152362/121533115 ↩

Plants In This Group

Mammillaria vetula

Mammillaria vetula

Mammillaria vetula

Mammillaria vetula is a Mexican species native from Guanajuato to Veracruz whose small stems can offset into clusters and are often confused with cultivated forms around gracilis . The species is recognized by small tuberculate stems that can offset into clusters, a radial spine cover ranging from white to yellowish, and small flowers. Cultivated forms around gracilis with fragile, readily detached offsets should not be treated as the complete expression of the species. Unlike the taxonomy article, the botanical dictionary layer explains the living plant's morphology, habitat context, and cultivation requirements.