The following is a list of the collections made by Watt 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 |
| 95083 | Carissa spinarum | 1 Sep 1957 | JS Watt |
JS Watt 37 | JWH Giess | WIND |
Okavango, Rundu District: Okavango, probably Andara. | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | -18.125000 | 21.375000 | 2 | |||||||
| 93242 | Guibourtia coleosperma | 1 Oct 1957 | JS Watt |
JS Watt 13 | JS Watt | WIND |
Caprivi: Bwabwata Rest Camp. Western Caprivi Zipfel. Dune. | 0 | Namibia (Caprivi Strip) | 1722D3 | 0 | Notes: Quoted in Flora of Southern Africa 16,2: 22 (1977) by J. H. Ross. | -17.875000 | 22.625000 | 5 | ||||||
| 93276 | Strychnos cocculoides | 1 Oct 1957 | JS Watt |
JS Watt 20 | JWH Giess | WIND |
Caprivi: Bwabwata Rest Camp. On dune. | 0 | Namibia (Caprivi Strip) | 1722D3 | 0 | Notes: Bushman: ' 'Nkwana'. | -17.875000 | 22.625000 | 5 | ||||||
| 95368 | Ximenia americana var. microphylla | 26 Sep 1957 | JS Watt |
JS Watt 7 | PRE WIND |
Caprivi: Andara. Diyona Rest Camp. Growing on the banks of the Okavango River. | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | -18.125000 | 21.375000 | 2 |