Ward, R. Grain, S. Hewitt, A. Miessener, J. (2000) Inventory Completion Report, Sensitive Plant Survey, Lincoln National Forest, Field Notes. Porject Name: Echinocereus fendleri keunzleri. Guadalupe Ranger District, Lincoln National Forest, USFS. 4 p.

• Echinocereus fendleri var. kuenzleri