External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:87594-2
- Publication
- Gesamtbeschreibung der Kakteen (Monographia Cactacearum) ... Neudamm
- Collation
- 392
- Family as entered in IPNI
- Cactaceae
Links
- Nomenclatural link
- Echinocactus tortuosus Link & Otto
- Same citation as
- Echinocactus ottonis var. tortuosus (Link & Otto) K.Schum.