| Name | Lactuca elongata var. sanguinea (Bigelow) Torrey & A. Gray |
| Authorship | (Bigelow) Torrey & A. Gray |
| Rank | Variety |
| Placed in | Lactuca elongata Muhlenberg ex Willdenow |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Lactuca elongata var. sanguinea (Bigelow) Torrey & A. Gray |
| Identification made in | [no date] (1) |
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