Taxonomy
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 2020.1. Accessed on 2022/01/26

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Distribution map


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