Echinonyctanthus nigrispinus Lem., Cact. Gen. Sp. Nov.: 85. 1839 Echinonyctanthus nigrispinus Lem., Cact. Gen. Sp. Nov.: 85. 1839is basionym for Echinopsis nigrispina (Lem.) Walp., Repert. Bot. Syst. 2: 324. 1843Taxon for this nameEchinonyctanthus nigrispinus Lem.