|
Scientific Name | Cynanchum meyeri (Decne.) Schltr. |
Higher Classification | Dicotyledons |
Family | APOCYNACEAE |
National Status |
Status and Criteria | Vulnerable* B1ab(iii)+2ab(iii) |
Assessment Date | 2015/06/11 |
Assessor(s) | L. von Staden |
Justification | National EOO 25 km², and known from two to three locations, where it is declining due to ongoing habitat loss and degradation. As the South African population is continuous with the larger and stable Namibian population, the national status is downgraded by one category as per IUCN regional assessment procedures. |
Distribution |
Endemism | Not endemic to South Africa |
Provincial distribution | Northern Cape |
Range | Lüderitz, southern Namibia to the lower Gariep Valley east of Alexander Bay, Northern Cape. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Western Gariep Lowland Desert |
Description | Rocky outcrops or gravelly flats on the coastal plain. |
Threats |
| This species is threatened by ongoing habitat loss and degradation as a result of open-cast mining and overgrazing by livestock in South Africa. Some subpopulations in Namibia are also threatened by mining, but the impact of this threat is currently small. |
Population |
This species is a localized habitat specialist, occurring in small, scattered subpopulations on shale outcrops. In South Africa it has a very limited distribution, but is recorded more widely in Namibia. The South African population is continuous with the Namibian population, which is stable.
|
Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Cynanchum meyeri (Decne.) Schltr. | VU* B1ab(iii)+2ab(iii) | 2015.1 | | Cynanchum meyeri (Decne.) Schltr. | Least Concern | Raimondo et al. (2009) | | Cynanchum meyeri (Decne.) Schltr. | Rare | Hilton-Taylor (1996) | |
Bibliography |
Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.
Liede, S. 1993. A taxonomic revision of the genus Cynanchum L. (Asclepiadaceae) in southern Africa. Botanische Jahrbücher für Systematik 114:503-550.
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.
Snijman, D.A. 2013. Plants of the Greater Cape Floristic Region 2: The extra Cape flora. Strelitzia 30. South African National Biodiversity Institute, Pretoria.
|
Citation |
| von Staden, L. 2015. Cynanchum meyeri (Decne.) Schltr. National Assessment: Red List of South African Plants version . Accessed on 2025/05/31 |
Comment on this assessment
