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Scientific Name | Oxalis blastorrhiza T.M.Salter |
Higher Classification | Dicotyledons |
Family | OXALIDACEAE |
National Status |
Status and Criteria | Endangered B1ab(ii,iii,iv,v)+2ab(ii,iii,iv,v) |
Assessment Date | 2011/09/30 |
Assessor(s) | L.L. Dreyer, K.C. Oberlander, N.A. Helme & L. von Staden |
Justification | An extremely localized species, restricted to the area immediately north of Vanrhynsdorp (EOO <50 km²). Plants at two to three locations continue to decline due to ongoing habitat loss to mining. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Vanrhynsdorp. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Vanrhynsdorp Gannabosveld |
Description | Alkaline sandy clay flats. |
Threats |
| Threatened by ongoing habitat loss to gypsum mining. One subpopulation was recently (2011) discovered during an Environmental Impact survey for a new proposed gypsum mine, and is likely to be lost to mining. Similar habitat across the N7 is already extensively transformed and degraded by a large and expanding open cast gypsum mine. As this species is extremely limited in distribution, restricted to the immediate area around the mines, mining is likely to cause a significant reduction of the population of this species (N.A. Helme, pers. comm.). |
Population |
Subpopulations are small and localized. One known subpopulation is restricted to the road verge, and another, consisting of about 100 mature individuals is about to be lost to mining. The population size cannot be estimated, as the extent of this species' habitat has not yet been fully explored, but it is suspected to be small.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Oxalis blastorrhiza T.M.Salter | VU D2 | 2011.1 | | Oxalis blastorrhiza T.M.Salter | VU D2 | Raimondo et al. (2009) | | Oxalis blastorrhiza T.M.Salter | Insufficiently Known | Hilton-Taylor (1996) | | Oxalis blastorrhiza T.M.Salter | Uncertain | Hall et al. (1980) | |
Bibliography |
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.
Salter, T.M. 1944. The genus Oxalis in South Africa: a taxonomic revision. Journal of South African Botany Supplement 1:1-355.
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Citation |
| Dreyer, L.L., Oberlander, K.C., Helme, N.A. & von Staden, L. 2011. Oxalis blastorrhiza T.M.Salter. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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