Mammillaria johnstonii Orcutt
, Cactography 7 (1926).
External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:151134-2
- Publication
- Cactography. National City and San Diego, CA
- Collation
- 7
- Family as entered in IPNI
- Cactaceae