Mammillaria mammillaris (L.) H.Karst., Deut. Fl.: 888. 1882 sec. Hunt 2016
- ≡Cactus mammillaris L., Sp. Pl.: 466. 1753 syn. sec. Hunt 2016
- ≡Neomammillaria mammillaris (L.) Britton & Rose, Cactaceae 4: 70–71, f. 64. 1923 syn. sec. Korotkova 2021
- =Cactus mammillaris var. glaber DC., Pl. Hist. Succ.: t. 111. 1803 syn. sec. Hunt 2016
- =Cactus mammillaris var. lanuginosus DC., Pl. Hist. Succ.: t. 111. 1803 syn. sec. Hunt 2016
- =Mammillaria simplex Haw., Syn. Pl. Succ.: 177. 1812, nom. cons., syn. sec. Hunt 2016
- =Mammillaria conica Haw., Suppl. Pl. Succ.: 71. 1819 syn. sec. Hunt 2016
- ≡Cactus conicus (Haw.) Kuntze, Revis. Gen. Pl. 1: 259. 1891 syn. sec. Kew WCVP (2019)
- =Mammillaria parvimamma Haw., Suppl. Pl. Succ.: 72. 1819 syn. sec. Britton & Rose 1923
- ≡Mammillaria simplex var. parvimamma (Haw.) Lem., Cact. Gen. Sp. Nov.: 98. 1839 syn. sec. Kew WCVP (2019)
- ≡Cactus parvimamma (Haw.) Kuntze, Revis. Gen. Pl. 1: 259. 1891 syn. sec. Hunt 2016
- ≡Neomammillaria parvimamma (Haw.) Y.Itô, Cactaceae: 621. 1981 syn. sec. Hunt 2016
- ≡Cactus parvimammus (Haw.) Kuntze, Revis. Gen. Pl. 1: 259. 1891 syn. sec. The Plant List v. 1.1 2013 [non Cactus parvimamma (Haw.) Kuntze 1891]
- =Cactus microthele Spreng., Syst. Veg., ed. 16, 2: 494. 1825 syn. sec. Kew WCVP (2019)
- =Mammillaria simplex Torr. & A.Gray in Fl. N. Amer. 1: 553. 1840 syn. sec. TROPICOS 1988+
- =Mammillaria obvallata Otto in Allg. Gartenzeitung 14: 308. 1846 syn. sec. TROPICOS 1988+
- ≡Cactus obvallatus (Otto) Kuntze, Revis. Gen. Pl. 1: 261. 1891 syn. sec. Hunt 2016
- =Mammillaria caracassana Otto ex Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 14. 1850 syn. sec. Kew WCVP (2019)
- =Mammillaria fuliginosa Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 10. 1850 syn. sec. TROPICOS 1988+
- =Mammillaria micrantha Hort. ex Rümpler, Handb. Cacteenk., ed. 2: 335. 1885 syn. sec. Kew WCVP (2019)
- =Mammillaria microthele Monv. ex Rümpler, Handb. Cacteenk., ed. 2: 335. 1885 syn. sec. Britton & Rose 1923
- =Mammillaria pseudosimplex W.Haage & Backeb. in Backeberg, Cactaceae 6 6: 3888. 1962 syn. sec. Hunt 2016
- =Mammillaria simplex var. albidispina Backeb., Kakteenlex.: 259. 1966 syn. sec. Kew WCVP (2019)
