Hensel, E. Benecke, T. Spindler, F. Ung, K. (1997) Inventory Completion Report, Sensitive Plant Survey, Lincoln National Forest, Field Notes. Project Name: National Kuenzleri Cactus Survey. Guadalupe Ranger District, Lincoln National Forest, USFS. 3 p.

• Echinocereus fendleri var. kuenzleri