Coryphantha difficilis Orcutt
, Cactography 3 (1926).
External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:66539-2
- Publication
- Cactography. National City and San Diego, CA
- Collation
- 3
- Family as entered in IPNI
- Cactaceae
Links
- Nomenclatural link
- Mammillaria difficilis Quehl, Monatsschr. Kakteenk. 18: 107 (1908).
- Same citation as
- Coryphantha difficilis Orcutt, Cactography 3 (1926).