The following is a list of the collections made by Roesch in species name order. The records are of species which occur in Rwanda (either as a native/naturalised species or as a cultivated species).
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| No | Species | Record date | Recorder(s) | Coll. | Det. | Conf. | Herbaria | Habitat | Location | Loc code | Outing code | Planted code | Country | QDS | Grid ref. | FZ Div | Alt. (m) | Notes | Lat | Long | Loc Acc Code |
| 93795 | Potamogeton schweinfurthii | 28 Jan 1999 | I Roesch |
I Roesch 6 | NV Clarke | WIND |
Caprivi: Kwando River, Mazambala Island Lodge. In main stream and backwater. | 0 | Namibia (Caprivi Strip) | 1723C4 | 0 | Notes: Flower: only older flower, erect above water surface. Leaves: simple, elongated. Older leaves under water surface, younger leaves flat on surface. Roots: plants is rooted very well. | -17.816670 | 23.333330 | 5 |