Asclepias dissona

Taxonomy
Scientific Name
Asclepias dissona N.E.Br.
Higher Classification
Dicotyledons
Family
APOCYNACEAE
Synonyms
Schizoglossum capitatum Schltr.
National Status
Status and Criteria
Critically Endangered (Possibly Extinct)
Assessment Date
2016/01/19
Assessor(s)
L. von Staden
Justification
This species was last recorded in 1932. In spite of extensive survey efforts by the Mpumalanga Parks and Tourism Agency, this species has not been found. Its habitat is extensively degraded and it is possibly extinct.
Distribution
Endemism
South African endemic
Provincial distribution
Mpumalanga
Range
Carolina and Machadodorp.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Lydenburg Montane Grassland, KaNgwane Montane Grassland, Eastern Highveld Grassland
Description
Damp grassland.
Threats
Grasslands within the known range of this species are extensively modified and degraded due to open-cast coal mining, crop cultivation and overgrazing. Very little remains intact.
Population
Population trend
Unknown
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Asclepias dissona N.E.Br.VU B1ab(ii,iii)+2ab(ii,iii)Raimondo et al. (2009)
Asclepias dissona N.E.Br.Indeterminate Hilton-Taylor (1996)
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.


Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.


Nicholas, A. 1982. Taxonomic studies in Asclepias (Asclepiadeae) with particular reference to the narrow-leaved species in southern Africa. University of Natal.


Nicholas, A. 1999. A taxonomic reassessment of the subtribe Asclepiadinae (Asclepiaceae) in Southern Africa. Unpublished Ph.D., University of Durban-Westville, Durban.


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
von Staden, L. 2016. Asclepias dissona N.E.Br. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2017/03/27

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Distribution map


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