Aztekium ritteri

Familia: Cactaceae
Subfamilia: Cactoideae
Tribus: Cacteae
Genus: Aztekium
Species:

Aztekium ritteri (Boed.) Boed., Monatsschr. Deutsch. Kakteen-Ges. 1: 52 (1929).

• Echinocactus ritteri Boed. in Z. Sukkulentenk.: 305. 1928 syn. sec. Guzmán Cruz & al. 2003

• Boedeker, F. (1929) Monatsschrift der Deutschen Kakteen-Gesellschaft 1: 52.

• Villaseñor, J.L. 2016. Checklist of the native vascular plants of Mexico. Revista Mexicana de Biodiversidad 87: 559–902. DOI: 10.1016/j.rmb.2016.06.017 Online PDF Reference page. 
• Hernández, H.M. & Gómez-Hinostrosa, C. (2015). Mapping the cacti of Mexico part II. Mammillaria Succulent Plant Research 9: 1-189.
• 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. 

• Korotkova, N. et al. 2021. Aztekium ritteri in Cactaceae at Caryophyllales.org. A global synthesis of species diversity in the angiosperm order Caryophyllales. Published online. Accessed: 2021 Nov 13. Reference page. 
• Govaerts, R. et al. 2021. Aztekium ritteri in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2021 Mar 04. Reference page. 
• International Plant Names Index. 2021. Aztekium ritteri. Published online. Accessed: Mar 04 2021. Reference page.
• Tropicos.org 2021. Aztekium ritteri. Missouri Botanical Garden. Published online. Accessed: 04 Mar 2021. Reference page.
• Hassler, M. 2021. Aztekium ritteri. 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 Mar 04. Reference page. 
• USDA, ARS, Germplasm Resources Information Network. Aztekium ritteri in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

For more multimedia, look at Aztekium ritteri on Wikimedia Commons.