External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:211542-1
- Publication
- Report on the United States and Mexican Boundary Survey, Made Under the Direction of the Secretary of the Interior, by William H. Emory. Volume 2, Botany
- Collation
- 101
- Date of Publication
- 1-20 Apr 1859
- Family as entered in IPNI
- Asteraceae