External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:135268-1
- Publication
- Contributions from the United States National Herbarium. Smithsonian Institution
- Collation
- ii. (1891) 129
- Family as entered in IPNI
- Cactaceae
Original Data
- Remarks
- (=Anhalonium Williamsii, Engelm.). Am
Links
- Duplicate citation of
- Mammillaria williamsii (Lem.) J.M.Coult., Contr. U.S. Natl. Herb. 2: 129 (1891).