Synonyms: Cactus pruinosus (homotypic); Cereus laevigatus; Cereus pruinosus (homotypic); Cereus roridus (homotypic); Echinocactus pruinosus (homotypic); Griseocactus pruinosus (homotypic); Griseocereus pruinosus (homotypic); Lemaireocereus laevigatus; Lemaireocereus laevigatus var. guatemalensis; Lemaireocereus pruinosus (homotypic); Neogriseocereus pruinosus (homotypic); Rathbunia laevigata; Rathbunia laevigata var. schumannii; Rathbunia pruinosa (homotypic); Ritterocereus laevigatus; Ritterocereus pruinosus (homotypic); Stenocereus laevigatus; Stenocereus laevigatus var. schumannii