Cereus pentlandii var. janthinus J.F.Cels in J. Soc. Imp. Centr. Hort. 8: 500. 1862 Cereus pentlandii var. janthinus J.F.Cels in J. Soc. Imp. Centr. Hort. 8: 500. 1862Taxon for this nameCereus pentlandii var. janthinus J.F.Cels