| Name | Lactuca ludoviciana (Nuttall) Riddell | 
| Authorship | (Nuttall) Riddell | 
| Rank | Species | 
| Placed in | Lactuca Linnaeus | 
| Citation | 1835 W. J. Med. Phys. Sci. 8: 491 | 
| Holdings | 41 Specimens held in the Harvard University Herbaria identified as Lactuca ludoviciana (Nuttall) Riddell | 
| Identification made in | [no date] (41) |