Mammillaria heyderi subsp. macdougalii
Mammillaria heyderi subsp. macdougalii, Mammillaria Postscripts 6: 10. 1997 sec. Hunt 20161
- ≡Mammillaria macdougalii, Stand. Cycl. Hort. 4: 1982. 1916 syn. sec. Hernández & Gómez-Hinostrosa 20152
- ≡Neomammillaria macdougalii, Cactaceae 4: 74. 1923 syn. sec. TROPICOS 1988+3
- ≡Mammillaria heyderi var. macdougalii in Proc. Calif. Acad. Sci., ser. 4, 25: 265. 1944 syn. sec. TROPICOS 1988+3
- ≡Mammillaria gummifera var. macdougalii, Cacti Ariz., ed. 3: 22. 1969 syn. sec. TROPICOS 1988+3
- 1. Hunt, D.R. 2016: CITES Cactaceae Checklist. 3rd edition. – published by the author, 2. Hernández, H.M. & Gómez-Hinostrosa, C. 2015: Mapping the cacti of Mexico. Part II. Mammillaria. – Succulent Plant Research 9: 1-189, 3. TROPICOS 1988+: Tropicos.org. Missouri Botanical Garden – https://tropicos.org