External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:175117-2
- Publication
- Report (Annual) of the Missouri Botanical Garden. St. Louis
- Collation
- 21: 167, pl. 21, 22
- Family as entered in IPNI
- Cactaceae
Type Information
- Distribution Of Types
- Texas (South-Central U.S.A., Northern America)