Trichocereus candicans var. tenuispinus (Pfeiff.) Backeb. in Cactus (Paris) 41: 107. 1954 Trichocereus candicans var. tenuispinus (Pfeiff.) Backeb. in Cactus (Paris) 41: 107. 1954is new combination for Cereus candicans var. tenuispinus Pfeiff., Enum. Diagn. Cact.: 91. 1837Taxon for this nameTrichocereus candicans var. tenuispinus (Pfeiff.) Backeb.