Cereus nigricans Lem., Cact. Gen. Sp. Nov.: 57. 1839 Cereus nigricans Lem., Cact. Gen. Sp. Nov.: 57. 1839is basionym for Pilocereus nigricans (Lem.) Lem. in Ill. Hort. 13(Misc.): 20. 1866Taxon for this nameCereus nigricans Lem., Cact. Gen. Sp. Nov.: 57. 1839