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 Angola (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 |
| 94420 | Hydrocotyle verticillata | 30 Oct 1974 | B Van de Waal |
B Van de Waal 37 | NV Clarke | WIND |
Caprivi: Singalamwe. | 0 | Namibia (Caprivi Strip) | 1724C4 | 0 | On old, rotting, floating reeds. | -17.875000 | 24.375000 | 4 | ||||||
| 93779 | Ludwigia adscendens subsp. diffusa | 6 Dec 1974 | B Van de Waal |
B Van de Waal 1 | C Mannheimer | WIND |
Caprivi: Singalamwe, Kwando. Kongola: bank of stream. | 0 | Namibia (Caprivi Strip) | 1723C4 | 0 | -17.875000 | 23.375000 | 5 | |||||||
| 94428 | Ludwigia adscendens subsp. diffusa | 25 Oct 1974 | B Van de Waal |
B Van de Waal 54 | C Mannheimer | WIND |
Caprivi: Singalamwe, Liambezi. | 0 | Namibia (Caprivi Strip) | 1724C4 | 0 | -17.875000 | 24.375000 | 4 | |||||||
| 94429 | Ludwigia leptocarpa | 1 Dec 1974 | B Van de Waal |
B Van de Waal 1 | WIND |
Caprivi: Katima Mulilo: Liambezi Lake. On permanent Salvinia mat. | 0 | Namibia (Caprivi Strip) | 1724C4 | 0 | -17.875000 | 24.375000 | 4 | ||||||||
| 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 | ||||||
| 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 |