Mammillaria polytricha var. tetracantha Salm-Dyck
, Allg. Gartenzeitung (Otto & Dietrich) 10: 290 (1842). BHL
External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:151468-2
- Publication
- Allgemeine Gartenzeitung
- Collation
- 10: 290
- Family as entered in IPNI
- Cactaceae