Echinocereus fendleri var. kuenzleri
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Chauvin, Y., A. Kennedy, and K. Wild. 2001. Survey for Kuenzleri's Hedgehog Cactus (Echinocereus fendleri var. kuenzleri). United States Forest Service (USFS) Regional Office, Albuquerque, NM. p. 32.
Bleakly, David. 2001. Echinocereus fendleri var. kuenzleri occurrences in the survey corridor along US-54, Lincoln County, New Mexico. Blue Earth Environmental, Santa Fe, New Mexico.. 1 p.