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Scientific Name | Acmadenia kiwanensis I.Williams |
Higher Classification | Dicotyledons |
Family | RUTACEAE |
National Status |
Status and Criteria | Critically Endangered B1ab(iii) |
Assessment Date | 2023/02/27 |
Assessor(s) | J.E. Victor |
Justification | This species has an extent of occurrence (EOO) of less than 100 km², one subpopulation at one known location is declining due to overgrazing and inappropriate fire management. It is therefore listed as Critically Endangered under criterion B. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Eastern Cape |
Range | This species is found between the Keiskamma and Chalumna Rivers. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Hamburg Dune Thicket |
Description | It grows in relict fynbos surrounded by mixed grassland in shallow soil on flat quartzitic sandstone. |
Threats |
| Plants at a single known location are threatened by uncontrolled overgrazing by cattle as well as too frequent fire. This species is a reseeder and likely to be negatively impacted by increasing fire cycles. |
Population |
One subpopulation is known.
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Population trend | Decreasing |
Conservation |
| It is not currently conserved in any formally protected area. |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Acmadenia kiwanensis I.Williams | CR B1ab(iii) | Raimondo et al. (2009) | | Acmadenia kiwanensis I.Williams | CR B1B2c | Victor (2002) | | Acmadenia kiwanensis I.Williams | Insufficiently Known | Hilton-Taylor (1996) | |
Bibliography |
Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.
Raimondo, D., von Staden, L., Foden, W., Victor, J.E., Helme, N.A., Turner, R.C., Kamundi, D.A. and Manyama, P.A. 2009. Red List of South African Plants. Strelitzia 25. South African National Biodiversity Institute, Pretoria.
Victor, J.E. 2002. South Africa. In: J.S. Golding (ed), Southern African plant Red Data Lists. Southern African Botanical Diversity Network Report 14 (pp. 93-120), SABONET, Pretoria.
Victor, J.E. and Dold, A.P. 2003. Threatened plants of the Albany Centre of Floristic Endemism, South Africa. South African Journal of Science 99:437-446.
Williams, I. 1978. Studies in the genera of the Diosmeae (Rutaceae): 7. Journal of South African Botany 44(4):329 - 362.
Williams, I. 1982. Studies in the genera of the Diosmeae (Rutaceae): 13. A revision of the genus Acmadenia. Journal of South African Botany 48(2):169-240.
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Citation |
| Victor, J.E. 2023. Acmadenia kiwanensis I.Williams. National Assessment: Red List of South African Plants version . Accessed on 2024/10/06 |
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