| Name | Cirsium engelmannii Rydberg |
| Authorship | Rydberg |
| Rank | Species |
| Placed in | Cirsium Miller |
| Citation | 1917 Fl. Rocky Mts. 1013, 1069 |
| Holdings | 14 Specimens held in the Harvard University Herbaria identified as Cirsium engelmannii Rydberg |
| Identification made in | [no date] (1), 1969 (2), 1997 (11) |
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