| Collector | Ollgaard, B. |
| Number | 3083 |
| Collected with | E. Meza Torres |
| Country | Argentina |
| Subpart | Corrientes |
| County | |
| Locality | P. N. Iberá, Rincón del Socorro, wet and mesic grassland and scrub forest. |
| Coordinates | 28° 38' 51.69'' S 57° 24' 57.23'' W |
| Minimum elevation (m) | 50 |
| Maximum elevation (m) | 50 |
| Start date | 2017/10/26 |
| End date | 2017/10/26 |
| Family | Acanthaceae |
| Identification | Hygrophila guianensis Nees |
| Determined by | |
| Identification qualifier | |
| Field notes | Erect herb in moist low part of grassland. Flowers whitish |
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