Tephrocactus geometricus

Familia: Cactaceae
Subfamilia: Opuntioideae
Tribus: Tephrocacteae
Genus: Tephrocactus
Species:

• Tephrocactus geometricus (A.Cast.) Backeb. in Backeb. & F.M.Knuth, Kaktus-ABC 111. (1936)
  

Note: Often treated as a synonym of Tephrocactus alexanderi (Britton & Rose) Backeb., Cactus (Paris) 38: 250. (1953) (POWO, 2025 & Hunt, 2016) c.f. CACO (2025)

• Basionym
  • Opuntia geometrica A.Cast., Kakteenkunde 1934: 172. (1934)
• Homotypic
  • Tephrocactus alexanderi subsp. geometricus (A.Cast.) Guiggi, Cactology 5 (Suppl. III): 2. (2016)

• Backeb. in Backeb. & F.M.Knuth (1936) Kaktus-ABC 111.

• Hunt, D. 2016. CITES Cactaceae Checklist, ed. 3: 1–174. PDF. Reference page. 
• Korotkova, N., Aquino, D., Arias, S., Eggli, U., Franck, A. , Gómez-Hinostrosa, C., Guerrero, P.C., Hernández, H.M., Kohlbecker, A., Köhler, M., Luther, K., Majure, L.C., Müller, A., Metzing, D., Nyffeler, R., Sánchez, D., Schlumpberger, B. & Berendsohn, W.G. 2021. Cactaceae at Caryophyllales. org–a dynamic online species-level taxonomic backbone for the family. Willdenowia 51(2): 251–270. DOI: 10.3372/wi.51.51208 Reference page. 

• Govaerts, R. et al. 2025. Tephrocactus geometricus in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2025 June 20. Reference page. 
• International Plant Names Index. 2022. Tephrocactus geometricus. Published online. Accessed: Jan 20 2022. Reference page.
• Korotkova, N. et al. 2025. Tephrocactus geometricus in Cactaceae at Caryophyllales.org. A global synthesis of species diversity in the angiosperm order Caryophyllales. Published online. Accessed: 2025 June 20. Reference page. 
• Tropicos.org 2025. Tephrocactus geometricus. Missouri Botanical Garden. Published online. Accessed: 20 June 2025. Reference page.
• LLIFLE - Encyclopedia of living forms 2013-2016. Tephrocactus geometricus in LLIFLE. Published on internet. Accessed: 2016 Jan 19.

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