External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:87373-2
- Publication
- Handbuch der Kakteenkultur.
- Collation
- 186
- Family as entered in IPNI
- Cactaceae
Links
- Nomenclatural link
- Echinocactus fennellii J.N.Haage
- Same citation as
- Echinocactus gibbosus f. fennellii (F.Haage) Schelle