| Name | Ranunculus aquatilis var. diffusus Withering |
| Authorship | Withering |
| Rank | Variety |
| Placed in | Ranunculus aquatilis Linnaeus |
| Holdings | 555 Specimens held in the Harvard University Herbaria identified as Ranunculus aquatilis var. diffusus Withering |
| Identification made in | [no date] (550), 2012 (4), 2017 (1) |