Cleistocactus ×villamontesii Cárdenas in Cact. Succ. J. (Los Angeles) 33: 76. 1961
Cleistocactus ×villamontesii in Cact. Succ. J. (Los Angeles) 33: 76. 1961
Type: Bolivia, Prov. Gran Chaco, Angosto Villa Montes, alt. 450 m, May 1958, M. Cárdenas 5524 (LIL: LIL001902) https://plants.jstor.org/stable/10.5555/al.ap.specimen.lil001902