| Name | Cirsium discolor f. albiflorum (Britton) House |
| Authorship | (Britton) House |
| Rank | Forma |
| Placed in | Cirsium discolor (Muhlenberg ex Willdenow) Sprengel |
| Citation | 1921 [1923] New York State Mus. Bull. 243–244: 55 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Cirsium discolor f. albiflorum (Britton) House |
| Identification made in | [no date] (5) |
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