Comments and References:

TROPICOS (Feb 18, 2016) Name accessed on 18 February 2016 in: Tropicos.org. Missouri Botanical Garden, 2008 - 4344 Shaw Boulevard, Saint Louis, Missouri 63110, U.S.A. on line at: http://www.tropicos.org/

Hernandez-Ledesma P et al. 2015, doi:10.3372/wi.45.45301 Hernandez-Ledesma P, Berendsohn WG, Borsch T, Von Mering S, Akhani H, Arias S, Castaneda-Noa I, Eggli U, Eriksson R, Flores- Olvera H, Fuentes-Bazan S, Kadereit G, Klak C, Korotkova N, Nyffeler R, Ocampo G, Ochoterena H, Oxelman B, Rabeler RK, Sanchez A, Schlumpberger BO & Uotila P. 2015. A taxonomic backbone for the global synthesis of species diversity in the angiosperm order Caryophyllales. Willdenowia, 45(3):281-383.

FNA - Sclerocactus Heil KD and Porter JM. 2004. In Flora of North America Editorial Committee (Eds.) Flora of North America North of Mexico, Vol. 4: Magnoliophyta: Caryophyllidae, Part 1. New York and Oxford. On-line version.

FNA - Echinomastus Zimmerman AD and Parfitt BD. 2004. Echinomastus Britton & Rose, Cact. 3: 147, figs. 154-158. 1922. In Flora of North America Editorial Committee (Eds.) Flora of North America North of Mexico, Vol. 4: Magnoliophyta: Caryophyllidae, Part 1. New York and Oxford. On-line version.

The Plant List - Echinomastus

Jepson eFlora Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.htm

External Information Resources (NCBI LinkOut)

Notes:

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Disclaimer: The NCBI taxonomy database is not an authoritative source for nomenclature or classification - please consult the relevant scientific literature for the most reliable information.

Reference: How to cite this resource - Schoch CL, et al. NCBI Taxonomy: a comprehensive update on curation, resources and tools. Database (Oxford). 2020: baaa062. PubMed: 32761142 PMC: PMC7408187.