Echinocereus fendleri var. kuenzleri
Fragua, S. Stewart, P. Finley, M. Storey, W. (2013) Inventroy Completion Report, Sensitive Plant Survey, Lincoln National Forest, Field Notes. Project Name: FY2013 Echinocereus var.fendleri kuenzleri survey/Sergent Allotment. Guadalupe Ranger District, Li
Worthington, Richard. Survey for Kuenzler's Cactus, Echinocereus fendleri (Engelm.) ex Rumpler var. kuenzleri On Texas Hill, Guadalupe Mts, New Mexico. Southwestern Research and Professional Services, El Paso, TX. 5p.
Paul, Larry W. 2012. Guadalupe Ranger District, Lincoln National Forest. Maps pp. 1-13.
Chauvin, Y., E. Milford, T. Neville, H. Varani and E. Muldavin. 2012. Kuenzler’s Hedgehog Cactus (Echinocereus fendleri var. kuenzleri) Surveys. Fort Stanton Snowy River National Conservation Area. Natural Heritage New Mexico Publ. No. 12-GTR-368. Natural
Baker, M. 2008. Botanical Survey 2008 Season - Kuenzler's cactus surveys. Guadalupe Ranger District, Lincoln National Forest. 19 p.
Chauvin, Y., J. Oliva, and S. Wood. 1999. Survey for Kuenzler's hedgehog cactus (Echinocereus fendleri var. kuenzleri). Unpubl. report by NM Natural Heritage Program for Bureau of Land Management Carlsbad Field Office. 21 p.
Camero, A. Fragua, S. Ross, D. (1999) Multiple Bundled Inventory Copmpletion Reports, Sensitive Plant Survey, Lincoln National Forest, Field Notes. Project Name: 1999 Kuenzler Survey. Guadalupe Ranger District, Lincoln National Forest, USFS. 48 p.
Muldavin, E., Y. Chauvin, and C. Reasner. 2017. Monitoring Kuenzler's Hedgehog Cactus (Echinocereus fendleri var. kuenzleri): 2015 Fort Stanton Surveys. Natural Heritage New Mexico, University of New Mexico. 22 p.
Sivinski, R. Smith, D. (1998) Inventory Completion Report, Sensitive Plant Survey, Lincoln National Forest, Field Notes. Project Name: Kuenzler Cactus Suvey. Guadalupe Ranger District, Lincoln National Forest, USFS. 4 p.
Sivinski, L. Lightfoot, K. Brown, D. (1998) Inventory Completion Report, Sensitive Plant Survey, Lincoln National Forest, Field Notes. Project Name: Kuenzler Cactus Survey. Guadalupe Ranger District, Lincoln National Forest, USFS. 4 p.