| Name | Cnicus undulatus var. megacephalus A. Gray |
| Authorship | A. Gray |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Cnicus undulatus (Nuttall) A. Gray |
| GUID | urn:lsid:ipni.org:names:61815-2 |
| Citation | 1875 Proc. Amer. Acad. Arts 10: 42 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Cnicus undulatus var. megacephalus A. Gray |
| Identification made in | 1946 (2), 1960 (2), 1988 (1) |
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