Acanthocalycium formosum (Pfeiff.) Backeb.
, Kaktus-ABC [Backeb. & Knuth] 224 (1936).
External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:1620-2
- Publication
- Kaktus-ABC, en Haandbog for Fagfolk og Amatorer. København
- Collation
- 224
- Date of Publication
- 12 Feb 1936
- Family as entered in IPNI
- Cactaceae