| Name | Cirsium occidentale (Nuttall) Jepson |
| Authorship | (Nuttall) Jepson |
| Rank | Species |
| Placed in | Cirsium Miller |
| Citation | 1901 Fl. W. Calif. 509 |
| Holdings | 54 Specimens held in the Harvard University Herbaria identified as Cirsium occidentale (Nuttall) Jepson |
| Identification made in | [no date] (54) |
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