The following is a list of the collections made by Groenendijk 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 |
| 113462 | Ansellia africana | 6 Oct 1983 | EMC Groenendijk |
EMC Groenendijk 698 | K LMU |
Between Rio Licuir and Rio Luambala. | 0 | Mozambique | 1336A3 | N | 800 | Cited in Flora Zambesiaca volume 11 part 2: 551, 1998. | 2 | ||||||||
| 73920 | Brillantaisia pubescens | 18 Aug 1983 | EMC Groenendijk J Dungo |
EMC Groenendijk J Dungo 635 | EMC Groenendijk J Dungo | SRGH LMU |
In cultivated field with bananas, tomatoes and Paw-paws | Along the road from Ancuabe to Pemba by Upulo River. | 0 | Mozambique | 1339B2 | N | 300 | herb c. 0,40 m high; leaves thin; stems square; flowers purple. | 2 |