Kuenzler's hedgehog cactus
Chauvin, Y. and C. Reasner. 2015. Surveys for Echinocereus fendleri var. kuenzleri at Ft. Stanton. Natural Heritage New Mexico.
Allen, T. 2007. Shapefile of Kuenzler's hedgehog cactus locations at Texas Hill. Bureau of Land Management.
Wester, D.B. and Britton, C.M. 2007. Effects of fire on Kuenzler's hedgehog cactus (Echinocereus fendleri var. kuenzleri). Final report to the Joint Fire Science Program, Project: 01C-3-3-12. 145 pp.
Visarraga, M. and Davidson, Z. 2018. St. Stanton surveys of Echinocereus fendleri var. kuenzleri. Bureau of Land Management (BLM), Santa Fe, NM.
Tonne, P. 2009. Results of surveys for Kuenzler's hedgehog cactus (Echinocereus fendleri var. kuenzleri) in the Brokeoff Mountains and western slopes of the Guadalupe Mountains. Natural Heritage New Mexico Publ. No. 09-GTR-355. Natural Heritage New Mexi