External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:971599-1
- Species Name
- Notocactus horstii F.Ritter, Succulenta (Netherlands) 45: 3 (1966).
- Publication
- Internoto
- Collation
- 14(2): 64 (1993):
- Date of Publication
- 1993
- Family as entered in IPNI
- Cactaceae