Hieracium umbellatum subsp. canadense (Michx.) Guppy
, Canad. J. Bot. 56: 3017 (1978).
External links to taxonomic opinions:
- IPNI Life Sciences Identifier (LSID)
- urn:lsid:ipni.org:names:122498-2
- Publication
- Canadian Journal of Botany. Ottawa
- Collation
- 56: 3017
- Family as entered in IPNI
- Asteraceae