External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:954233-1
- Publication
- Madrono; Journal of the California Botanical Society
- Collation
- 34(4): 347
- Date of Publication
- 1987 publ. 1988
- Family as entered in IPNI
- Crassulaceae