| Name | Cirsium quercetorum var. walkerianum (Petrak) Jepson |
| Authorship | (Petrak) Jepson |
| Rank | Variety |
| Placed in | Cirsium quercetorum (A. Gray) Jepson |
| Citation | 1925 Man. Fl. Pl. Calif. 1164 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Cirsium quercetorum var. walkerianum (Petrak) Jepson |
| Identification made in | [no date] (1) |
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