Neoporteria nidus f. senilis (Backeb.) Donald & G.D.Rowley in Cact. Succ. J. Gr. Brit. 28: 57. 1966 Neoporteria nidus f. senilis (Backeb.) Donald & G.D.Rowley in Cact. Succ. J. Gr. Brit. 28: 57. 1966Taxon for this nameNeoporteria nidus f. senilis (Backeb.) Donald & G.D.Rowley