| Name | Cnicus rothrockii var. diffusus Eastwood |
| Authorship | Eastwood |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Cnicus rothrockii A. Gray |
| GUID | urn:lsid:ipni.org:names:61810-2 |
| Citation | Proc. Calif. Acad. Sci. 6: 303 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Cnicus rothrockii var. diffusus Eastwood |
| Identification made in | [no date] (1) |