Armatocereus riomajensis

Familia: Cactaceae
Subfamilia: Cactoideae
Tribus: Echinocereeae
Genus: Armatocereus
Species:

Armatocereus riomajensis Rauh & Backeb., 1957 ["1956"]
Note: POWO (2025) places this taxon in their synonymy of Armatocereus matucanensis Backeb., in C.Backeberg & F.M.Knuth, Kaktus-ABC: 176, 411 (1936), whereas CACO (2021) and Hassler (2025) accepts its segregation, Tropicos (2025) is ambivalent.

• Rauh, W. & Backeberg, C. 1957 ["1956"] : Descr. Cact. Nov. 1: 13.

• 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. 
• Hunt, D. 2016. CITES Cactaceae Checklist, ed. 3: 1–174. PDF. Reference page. 

• Korotkova, N. et al. 2021. Armatocereus riomajensis in Cactaceae at Caryophyllales.org. A global synthesis of species diversity in the angiosperm order Caryophyllales. Published online. Accessed: 2021 Dec 08. Reference page. 
• Govaerts, R. et al. 2021. Armatocereus riomajensis in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2021 Dec 08. Reference page. 
• International Plant Names Index. 2021. Armatocereus riomajensis. Published online. Accessed: Dec 08 2021. Reference page.
• Tropicos.org 2021. Armatocereus riomajensis. Missouri Botanical Garden. Published online. Accessed: 08 Dec 2021. Reference page.
• Hassler, M. 2021. Armatocereus riomajensis. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2021. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: 2021 Dec 08. Reference page. 

For more multimedia, look at Armatocereus riomajensis on Wikimedia Commons.