| Name | Carduus truncatus Greene ex Rydberg |
| Authorship | Greene ex Rydberg |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Carduus Linnaeus |
| Citation | 1906 Fl. Colorado [Rydberg] 400-401 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Carduus truncatus Greene ex Rydberg |
| Identification made in | [no date] (1) |
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