| Collector | Madsen, J. E. |
| Number | 4607 |
| Collected with | |
| Country | Senegal |
| Subpart | TAMBACOUNDA |
| County | |
| Locality | Parc National du Niokolo Koba. Road Dar Salam - Niokolo-Koba camp site, km 34. Border of small stream, now almost dry. Gallery forest with Mitragyna. |
| Coordinates | 13° 10' N 12° 54' W |
| Minimum elevation (m) | 100 |
| Maximum elevation (m) | 100 |
| Start date | 1995/11/11 |
| End date | 1995/11/11 |
| Family | Poaceae |
| Identification | Ischaemum rugosum Salisb. |
| Determined by | Laegaard, S. (AAU), 1996. |
| Identification qualifier | |
| Field notes | Tufts with spreading branches. |
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