| Name | Carduus tenuiflorus Curtis |
| Authorship | Curtis |
| Rank | Species |
| Placed in | Carduus Linnaeus |
| Citation | 1789 Fl. Londin. (Curtis), ed. 2. 2(6,61): pl. 55 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Carduus tenuiflorus Curtis |
| Identification made in | [no date] (1) |
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