| Name | Cirsium arizonicum (A. Gray) Petrak |
| Authorship | (A. Gray) Petrak |
| Rank | Species |
| Placed in | Cirsium Miller |
| Citation | 1911 Bot. Tidsskr. 31: 68 |
| Holdings | 10 Specimens held in the Harvard University Herbaria identified as Cirsium arizonicum (A. Gray) Petrak |
| Identification made in | [no date] (4), 1911 (1), 1961 (5) |
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