Scientific taxonomy article
Accepted name and publication history
The current Kew backbone accepts Mammillaria schiedeana; the standardized author citation is C.Ehrenb. Christian Gottfried Ehrenberg published the name in 1838 in Allgemeine Gartenzeitung 6: 249. 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 accepts five homotypic generic combinations based on the same type and keeps three accepted subspecies separate from the species node.
Taxon boundary and infraspecific treatment
In the Kaktüs Doktoru backbone, the species is a child of Mammillaria. Kew accepts subsp. dumetorum, subsp. giselae, and the nominal subsp. schiedeana. These child taxa are not mixed into the five homotypic species synonyms. 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 can be recognized by a small globose or short-cylindrical stem, numerous fine radial spines on distinct tubercles, fewer central spines, pale flowers, and conspicuous mature fruits. Stem and spine appearance varies among subspecies, so one commercial photograph cannot define the species boundary. 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. A modelled threat prediction displayed by Kew is not substituted for an official IUCN assessment or category. The conservation field remains empty because no verified global IUCN assessment was found.3 No verified global IUCN species assessment was found, so the unsupported live LC value should be cleared. The field remains empty rather than inventing a category, and the lack of an official assessment is stated explicitly.
Synonymy and retrieval
Kew accepts 5 synonyms at the species node: Cactus schiedeanus, Chilita schiedeana, Ebnerella schiedeana, Escobariopsis schiedeana, and Neomammillaria schiedeana are five homotypic combinations based on the same type. These are not canonical routes; they document nomenclatural history and support retrieval of older literature. Subsp. dumetorum, subsp. giselae, and the nominal subspecies are accepted child taxa, not species synonyms.1
References
- Plants of the World Online. “Mammillaria schiedeana C.Ehrenb.” Royal Botanic Gardens, Kew. Accessed: 2026-08-04. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:151658-2 ↩
- International Plant Names Index. “Mammillaria schiedeana C.Ehrenb.” Accessed: 2026-08-04. https://www.ipni.org/n/151658-2 ↩
- World Flora Online. “Mammillaria schiedeana C.Ehrenb.” Accessed: 2026-08-04. https://www.worldfloraonline.org/search?query=Mammillaria+schiedeana ↩
- 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 ↩
