Scientific taxonomy article
Accepted name and nomenclatural record
Kew POWO accepts Echinocereus poselgeri with the author citation Lem.; IPNI confirms the first-publication record as “Cactées: 57 (1868)”.12 The native distribution is South Texas to northeastern Mexico. The native range is associated with dry shrubland and desert habitats of South Texas and northeastern Mexico; retail inventory, price or nursery production is not a measure of wild populations.
Classification and diagnostic boundary
The live lineage is species → Echinocereus → Cactaceae. This package owns only the existing species node and its direct Echinocereus genus relationship; it creates no genus, family, order or accepted infraspecific node and updates no ancestor. Slender cylindrical shoots, areole and spine pattern, the fleshy tuberous underground root, flowers, fruit, seed and documented provenance should be evaluated together.
Identification cannot be reduced to one product photograph, a trade common name, body colour or flower colour alone. Ribs, areoles, central and radial spines, root structure, flowers, fruit, seed, native range and documented provenance should be assessed together. Elongation, drought colour or nursery form does not automatically change the scientific name.
Synonymy and canonical boundary
The current Kew species surface maintains 8 nomenclatural synonym records. Kew maintains eight synonyms: three homotypic combinations and five heterotypic names. Historical Wilcoxia and Cereus combinations are not separate accepted-species routes. E. poselgeri subsp. kroenleinii is maintained by Kew under accepted E. kroenleinii, while Cereus poselgerianus belongs under E. berlandieri; neither enters this synonym set.
Homotypic names share a nomenclatural type; heterotypic names represent historical taxonomic opinions based on other types. Synonyms support search and literature retrieval and do not create a separate accepted product, botanical or taxonomy route. Names of other accepted species or accepted subspecies are not moved into the canonical species payload.
Range, ecology and global conservation
The native distribution is recorded as South Texas to northeastern Mexico.1 The species is considered in the context of the desert or dry shrubland biome. Commercial inventory, nursery origin, price and sales frequency are not measures of wild-population status.
The global conservation field is LC.3 Global LC is retained. Least Concern derives from the wild-range assessment, not from one plant in commercial inventory.
Editorial and data ownership
Product name and copy, price, stock, SKU, images, variants, categories, common names, slugs and the product-to-botanical link are not changed by this taxonomy-only source. Live toxicity, difficulty and light enums are carried forward exactly; watering, temperature and soil metrics are omitted from the curated source and preserved from production. Legacy pricing research, hypothetical exchange-rate calculations and Google-grounded metadata are not reused as scientific authority.
This separation prevents the commercial product narrative, cultivation-focused dictionary article and nomenclatural-systematic taxonomy article from collapsing into one text. Any future accepted infraspecific publication requires its own identity, evidence, builder, disposable and production-release gates.
References
- Plants of the World Online, Royal Botanic Gardens, Kew. “Echinocereus poselgeri Lem..” Accessed: 2026-08-07. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:87988-2 ↩
- International Plant Names Index. “Echinocereus poselgeri nomenclatural record.” Accessed: 2026-08-07. https://www.ipni.org/n/87988-2 ↩
- IUCN Red List of Threatened Species. “Echinocereus poselgeri global conservation assessment.” Accessed: 2026-08-07. https://www.iucnredlist.org/species/151193/121440514 ↩
- Plants of the World Online, Royal Botanic Gardens, Kew. “Echinocereus poselgeri subsp. kroenleinii exclusion.” Accessed: 2026-08-07. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:1216655-2 ↩
- Plants of the World Online, Royal Botanic Gardens, Kew. “Cereus poselgerianus exclusion.” Accessed: 2026-08-07. https://powo.science.kew.org/taxon/53226-2 ↩
