External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:977692-1
- Publication
- Calyx. Sutton under Whitestone Cliffe
- Collation
- 4(4): 140 (1994):
- Date of Publication
- 1994
- Family as entered in IPNI
- Cactaceae