= Echinopsis maytana Molinari; Succulentopia 13: 19 (2015), nom. nov. for Mila caespitosa
= Echinopsis rommyana Molinari; Succulentopia 13: 19 (2015), nom. nov. for Mila nealeana Backeb.
= Mila alboareolata Akers; Fuaux Herb. Bull. 5: 2-3 (1953)
= Mila breviseta Rauh & Backeb.; Descr. Cact. Nov. [Backeberg] 12 (1957)
= Mila caespitosa f. breviseta (Rauh & Backeb.) Donald; Ashingtonia 3(3-4): 62 (1978)
= Mila caespitosa f. fortalezensis (Rauh & Backeb.) Donald; Ashingtonia 3: 61 (1978)
= Mila caespitosa f. kubeana (Werderm. & Backeb.) Donald; Ashingtonia 3(3-4): 62 (1978)
= Mila caespitosa f. lurinensis (Rauh & Backeb.) Donald; Ashingtonia 3(3-4): 62 (1978)
= Mila caespitosa subsp. densiseta (Rauh & Backeb.) Ostolaza; Brit. Cact. Succ. J. 20(1): 39 (2002)
= Mila caespitosa subsp. fortalezensis (Rauh & Backeb.) Ostolaza; Cactus Perú 372 (2014)
= Mila caespitosa subsp. nealeana (Backeb.) Donald; Ashingtonia 3(3-4): 62 (1978)
= Mila caespitosa var. alboareolata (Akers) Donald; Ashingtonia 3(3-4): 62 (1978)
= Mila caespitosa var. densiseta (Rauh & Backeb.) Donald; Ashingtonia 3(3-4): 62 (1978)
= Mila caespitosa var. fortalezensis (Rauh & Backeb.) Donald; Ashingtonia 3(3-4): 61 (1978)
= Mila cereoides Rauh & Backeb.; Descr. Cact. Nov. [Backeberg] 1: 11 (1956 publ. 1957)
= Mila colorea F.Ritter; Kakteen Südamerika 4: 1341 (1981)
= Mila densiseta Rauh & Backeb.; Descr. Cact. Nov. [Backeberg] 1: 11 (1956 publ. 1957)
= Mila fortalezensis Rauh & Backeb.; Descr. Cact. Nov. [Backeberg] 1: 11 (1956 publ. 1957)
= Mila kubeana Werderm. & Backeb.; Backeb. Neue Kakteen 83 (1931), et Repert. Spec. Nov. Regni Veg. 30: 63 (1932)
= Mila kubei Backeb.; Möller´s Deutsche Gärtn.-Zeitung 46: 187 (1931)
= Mila lurinensis Rauh & Backeb.; Descr. Cact. Nov. [Backeberg] 1: 11 (1956 publ. 1957)
= Mila nealeana Backeb.; Cact. J. (Croydon) 2: 31 (1933), nomen, Backeb. Blätter Kaktee, Pt. 1 1, p. 2, descr. (1934)
= Mila nealeana f. senilis F.Ritter; Kakteen Südamerika 4: 1341 (1981), no type indicated.
= Mila nealeana var. tenuior Rauh & Backeb.; Descr. Cact. Nov. [Backeberg] 1: 11 (1956 publ. 1957)