The following is a list of the collections made by van Niekerk 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 |
| 124056 | Bidens diversa | 7 Apr 2024 | N Wightman J Alfonsi I Kabinda W van Niekerk M Kaluwe |
N Wightman J Alfonsi I Kabinda W van Niekerk M Kaluwe NCW1260 | KB Vollesen | K ZAHBRI |
Escarpment Brachystegia woodland | Nsama District, Northern Province, Zambia | 0 | Zambia | 0930A1 | N | 1477 | -9.230245 | 30.167091 | 6 | |||||
| 130663 | Bidens moorei | 8 Nov 2025 | N Wightman W van Niekerk |
N Wightman W van Niekerk NCW1501 | N Wightman | K NDO ZAHBRI |
Miombo woodland slope | Mwinilunga District, North-Western Province | 0 | Zambia | 1124C2 | W | 1331 | -11.714170 | 24.354130 | 6 | |||||
| 130664 | Brachycorythis mixta | 10 Nov 2025 | N Wightman W van Niekerk |
N Wightman W van Niekerk NCW1507 | N Wightman | B Bytebier | NDO NU ZAHBRI |
Seepage dambo grassland | Mwinilunga District, North-Western Province | 0 | Zambia | 1124C2 | W | 1367 | 6 | ||||||
| 131396 | Eulophia arenicola | 16 Nov 2025 | N Wightman W van Niekerk |
N Wightman W van Niekerk NCW1510 | B Bytebier | NU ZAHBRI |
Degraded miombo woodland | Mushindamo District, North-Western Province | 0 | Zambia | 1226B4 | W | 1371 | 6 | |||||||
| 124082 | Napoleonaea gossweileri | 25 Apr 2024 | N Wightman W van Niekerk M Kaluwe |
N Wightman W van Niekerk M Kaluwe NCW1301 | N Wightman | K ZAHBRI |
Kalahari woodland | Mawela, Senanga District, Western Province Zambia | 0 | Zambia | 1623A2 | B | 1045 | -16.024280 | 23.370931 | 6 | |||||
| 124070 | Pavetta radicans | 4 Apr 2024 | N Wightman J Alfonsi I Kabinda W van Niekerk M Kaluwe |
N Wightman J Alfonsi I Kabinda W van Niekerk M Kaluwe NCW1224 | N Wightman | K ZAHBRI |
Brachystegia woodland | Tondwa GMA, Nsama District, Northern Province, Zambia | 0 | Zambia | 0830C1 | N | 1059 | -8.605970 | 30.206310 | 6 | |||||
| 124100 | Vitex madiensis subsp. milanjiensis | 30 Mar 2024 | N Wightman J Alfonsi I Kabinda W van Niekerk M Kaluwe |
N Wightman J Alfonsi I Kabinda W van Niekerk M Kaluwe NCW1184 | N Wightman | K ZAHBRI |
Brachystegia woodland | Tondwa GMA, Nsama District, Northern Province, Zambia | 0 | Zambia | 0830C1 | N | 1072 | -8.608170 | 30.214115 | 6 |