The following is a list of the collections made by Jacobsen in species name order. The records are of species which occur in Uganda (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 |
| 49631 | Ophioglossum costatum | 7 Apr 1969 | N Jacobsen |
N Jacobsen 605 | SRGH |
Growing in damp soil at edge of pan in Mopani woodland | Sengwa Research station | 0 | Zimbabwe | 1828A2 | N | 0 | A large colony seen | 0.000000 | 0.000000 | 2 | |||||
| 41105 | Psilotum nudum | 29 Dec 1967 | N Jacobsen |
N Jacobsen 76 | SRGH |
Growing out of rock face in very shaded gorge of a tributary of the Kove River. | Sengwa Research Station, Gokwe | 0 | Zimbabwe | 1828A1 | N | 0 | 0.000000 | 0.000000 | 2 |