| Name | Hydrocotyle pennellii Rose & Mathias |
| Authorship | Rose & Mathias |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Hydrocotyle |
| Citation | 1936 Brittonia 2: 229 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Hydrocotyle pennellii Rose & Mathias |
| Identification made in | [no date] (1) |