Taxonomy
Scientific Name
Sisyranthus anceps Schltr.
Higher Classification
Dicotyledons
Family
APOCYNACEAE
National Status
Status and Criteria
Endangered B1ab(ii,iii)+2ab(ii,iii)
Assessment Date
2014/09/30
Assessor(s)
H. Mtshali
Justification
Historical EOO 98 km², but currently remaining at only four locations (EOO 11 km²), and declining due to ongoing habitat loss and degradation.
Distribution
Endemism
South African endemic
Provincial distribution
KwaZulu-Natal
Range
Inanda and surrounding areas, north of Durban.
Habitat and Ecology
Major system
Terrestrial
Major habitats
KwaZulu-Natal Sandstone Sourveld, KwaZulu-Natal Hinterland Thornveld
Description
Sandstone sourveld.
Threats
This species has lost almost all of its grassland habitat to urban expansion, and at least one known subpopulation occurs on a site earmarked for development. Remaining fragments are degraded due to a lack of fire (many becoming encroached with woody species), and are infested with alien invasive plants.
Population

This species was previously known only from the type, collected in 1880 at Inanda. Four new subpopulations have been found since 2010, but these are all confined to small grassland fragments within urban areas, and continue to decline due to ongoing habitat loss and degradation. Two of the subpopulations have been surveyed and are very small, consisting of fewer than 50 mature individuals.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Sisyranthus anceps Schltr.EN B1ab(ii,iii)+2ab(ii,iii)2015.1
Sisyranthus anceps Schltr.Data Deficient Raimondo et al. (2009)
Bibliography

Brown, N.E. 1909. Asclepiadeae. In: W.T. Thiselton-Dyer (ed). Flora Capensis IV Section I (Vacciniaceae to Gentianeae):518-1036. Lovell Reeve & Co., Ltd., London.


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.


Citation
Mtshali, H. 2014. Sisyranthus anceps Schltr. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2022/05/16

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Distribution map

© E. Douwes

© H. Mtshali

© H. Mtshali


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