Cereus huilunchu Holotype: Bolivia, Cochabamba, Ayopaya, near Bajios de Yayani, M. Cárdenas 4574 (LIL: LIL001891) Isotype: Bolivia, Cochabamba, Ayopaya, near Bajios de Yayani, M. Cárdenas 4574 (US: 00115555)