The following is a list of the collections made by Van de Waal in species name order. The records are of species which occur in Democratic Republic of the Congo (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 |
| 93788 | Nymphaea nouchali var. caerulea | 8 Nov 1974 | B Van de Waal |
B Van de Waal 38 | NV Clarke | WIND |
Caprivi | 0 | Namibia (Caprivi Strip) | 1723C4 | 0 | Notes: Leaves round with small flowers. | -17.875000 | 23.375000 | 5 | ||||||
| 94352 | Ottelia ulvifolia subsp. ulvifolia | 1 Feb 1974 | B Van de Waal |
B Van de Waal 47 | JWH Giess | WIND |
Caprivi: Katima Mulilo, Chinchimane stream. | 0 | Namibia (Caprivi Strip) | 1724C3 | 0 | Notes: Fast running water, 2 m deep. | -17.875000 | 24.125000 | 4 | ||||||
| 94439 | Ottelia ulvifolia subsp. ulvifolia | 1 Mar 1975 | B Van de Waal |
B Van de Waal 45 | JWH Giess | WIND |
Caprivi: Katima Mulilo. Temporary hole near Liambezi lake (Bukalo). | 0 | Namibia (Caprivi Strip) | 1724C4 | 0 | -17.875000 | 24.375000 | 4 | |||||||
| 95600 | Ottelia ulvifolia subsp. ulvifolia | 8 Nov 1974 | B Van de Waal |
B Van de Waal 31 | JWH Giess | WIND |
Caprivi: Siambisso. Lianshulu. Side arm of Kwando. Water shallow-flowing. | 0 | Namibia (Caprivi Strip) | 1823A2 | 0 | -18.125000 | 23.375000 | 2 | |||||||
| 95659 | Ottelia ulvifolia subsp. ulvifolia | 25 Nov 1974 | B Van de Waal |
B Van de Waal 27 | WIND |
Caprivi: Siambiso. Chobe Camp: Hunters Africa. | 0 | Namibia (Caprivi Strip) | 1823B3 | 0 | -18.375000 | 23.625000 | 2 | ||||||||
| 94443 | Persicaria decipiens | 1 Dec 1974 | B Van de Waal |
B Van de Waal s.n.-G | WIND |
Caprivi: Katima Mulilo District: Salvinia mat. | 0 | Namibia (Caprivi Strip) | 1724C4 | 0 | Notes: Corr. nom.: S. Rgheimer 5.2007. | -17.875000 | 24.375000 | 4 |