External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:20001769-1
- Publication
- Bradleya; Yearbook of the British Cactus and Succulent Society. Botley
- Collation
- 19: 75 (2001)
- Family as entered in IPNI
- Cactaceae