External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:188989-1
- Publication
- Flora Boreali-Americana [Hooker]; or, the botany of the northern parts of British America...
- Collation
- 1(6): 302
- Date of Publication
- late 1833
- Family as entered in IPNI
- Asteraceae