Taxonomy
Scientific Name
Euphorbia waterbergensis R.A.Dyer
Higher Classification
Dicotyledons
Family
EUPHORBIACEAE
National Status
Status and Criteria
Rare
Assessment Date
2008/06/25
Assessor(s)
P.J.D. Winter, J.E. Victor & L. von Staden
Justification
EOO 730 km². Until 1978 this species was known from only three subpopulations and it was placed on the former Transvaal Province's list of threatened species. However, subsequent surveys indicated that although restricted in range, the species is locally very common and there are more than 10 subpopulations. Isolated cases of habitat destruction have affected a few subpopulations in the past, but there is no evidence of continuing decline. Subpopulations appear healthy and are recruiting successfully. However, occasional monitoring is still necessary, because if further declines are detected this species would qualify under NT B.
Distribution
Endemism
South African endemic
Provincial distribution
Limpopo
Range
Northern Waterberg between Lephalale, Marongwe and the Lephalale River.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Waterberg Mountain Bushveld
Description
Quartzite ridges and outcrops, mixed bushveld, 900-1100 m.
Threats
Isolated cases of habitat destruction have affected a few subpopulations in the past, but there is no evidence of continuous decline (Fourie 1984). Much of this species' habitat is protected in provincial and private nature reserves, or otherwise used for low-impact game farming.
Population

A number of new subpopulations were found during a survey by the former Transvaal Department of Nature Conservation. These were all healthy subpopulations, observed to have prolific flowering and seed set as well as a balanced age-class structure indicating stability (Fourie 1984).


Population trend
Stable
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Euphorbia waterbergensis R.A.DyerRare Raimondo et al. (2009)
Euphorbia waterbergensis R.A.DyerVulnerable Hilton-Taylor (1996)
Euphorbia waterbergensis R.A.DyerRare Hall et al. (1980)
Bibliography

Fourie, S.P. 1984. Threatened Euphorbias of the Transvaal. The Euphorbia Journal 2:75-90.


Hall, A.V., De Winter, M., De Winter, B. and Van Oosterhout, S.A.M. 1980. Threatened plants of southern Africa. South African National Scienctific Programmes Report 45. CSIR, Pretoria.


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


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
Winter, P.J.D., Victor, J.E. & von Staden, L. 2008. Euphorbia waterbergensis R.A.Dyer. National Assessment: Red List of South African Plants version . Accessed on 2024/06/14

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Distribution map


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