Asclepias disparilis

Taxonomy
Scientific Name
Asclepias disparilis N.E.Br.
Higher Classification
Dicotyledons
Family
APOCYNACEAE
National Status
Status and Criteria
Endangered B1ab(ii,iii,iv)
Assessment Date
2016/01/19
Assessor(s)
A. Nicholas, C.R. Scott-Shaw & L. von Staden
Justification
EOO 359 km², plants at two remaining locations continue to decline due to ongoing habitat loss and degradation.
Distribution
Endemism
South African endemic
Provincial distribution
KwaZulu-Natal
Range
Creighton to Harding, southern KwaZulu-Natal.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Ngongoni Veld, Southern KwaZulu-Natal Moist Grassland
Description
Mistbelt and coastal grassland, 900 m.
Threats
Very little of this species' habitat remains intact, after extensive loss to timber plantations, sugarcane cultivation, and rural settlements. Habitat loss continues rapidly as rural settlements continue to expand across this species' remaining habitat. Both known remaining subpopulations are threatened by habitat loss to settlements as well as overgrazing. This species is not known to occur in any protected areas, and is in severe danger of extinction.
Population

This species historically had a very limited distribution range, and within this area, more than 80% of grasslands have been lost or degraded. Currently only two subpopulations are known to remain near Harding, in the southern part of this species' former range.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Asclepias disparilis N.E.Br.VU B1ab(ii,iii,iv)Raimondo et al. (2009)
Asclepias disparilis N.E.Br.VU B1B2abcdScott-Shaw (1999)
Asclepias disparilis N.E.Br.Vulnerable Hilton-Taylor (1996)
Bibliography

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 Unpublished Ph.D., University of Durban-Westville, Durban.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.


Scott-Shaw, C.R. 1999. Rare and threatened plants of KwaZulu-Natal and neighbouring regions. KwaZulu-Natal Nature Conservation Service, Pietermaritzburg.


Citation
Nicholas, A., Scott-Shaw, C.R. & von Staden, L. 2016. Asclepias disparilis N.E.Br. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2017/08/17

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Distribution map

© D. Styles

© D. Styles


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