| Name | Oxalis piauhyensis R. Knuth |
| Authorship | R. Knuth |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Oxalis |
| GUID | urn:lsid:ipni.org:names:178337-2 |
| Citation | 1919 Notizbl. Bot. Gart. Berlin-Dahlem 7: 294 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Oxalis piauhyensis R. Knuth |
| Identification made in | [no date] (1) |