1. Baker M (2007) Defining populations of the Kuenzler’s hedgehog cactus (Echinocereus fendleri var. kuenzleri). A multivariate study of morphological characters. Report to the Lincoln National Forest, U.S. Forest Service, Alamogordo, New Mexico
2. Baker MA, Rebman JP, Parfitt BD, Pinkava DJ, Zimmerman AD (2009) Chromosome numbers in some cacti of western North America–VIII. Haseltonia 15:117–134
3. Benson L (1982) The cacti of the United States and Canada. Stanford University Press, Stanford, California
4. Blue Earth Ecological Consultants, Inc (2002) Biological Survey Report for Realignment and Reconstruction of U.S. 54, Carrizozo to Vaughn (MP 130 to MP 201). Report to the New Mexico State Highway and Transportation Department, Santa Fe, New Mexico
5. Bombonato JR, do Amaral DT, Silva GAR, Khan G, Moraes EM, da Silva Andrade SC et al (2020) The potential of genome-wide RAD sequences for resolving rapid radiations: a case study in Cactaceae. Mol Phylogenet Evol 151:106896