Ross, D. Black, K. Lawrence, J. Shanks, B. Mercurio, C. Kilday, L. Kestner, T. Kestern, G. (1998) Sensitive Plant Site Report, Population Site Report, Lincoln National Forest, Field Notes. Guadalupe Ranger District, Lincoln National Forest, USFS. 4 p.

• Echinocereus fendleri var. kuenzleri