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Scientific Name | Nemesia williamsonii K.E.Steiner |
Higher Classification | Dicotyledons |
Family | SCROPHULARIACEAE |
National Status |
Status and Criteria | Least Concern |
Assessment Date | 2015/04/29 |
Assessor(s) | L. von Staden |
Justification | A range-restricted, but locally common species that is not in danger of extinction. |
Distribution |
Endemism | Not endemic to South Africa |
Provincial distribution | Northern Cape |
Range | Richtersveld, from the Fish River Canyon (Namibia) to the Ploegberg. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Succulent Karoo |
Description | Cracks and crevices at the base of low, rocky hills, in or near dry streambeds or drainage lines. |
Threats |
| This species is threatened in parts of its range by habitat loss to mining, and habitat degradation and trampling due to overgrazing. |
Population |
This species is locally common, but localized to suitable habitat, particularly after good rainfall. It is declining over parts of its range due to habitat loss and degradation. It cannot be relocated at the type locality on Helskloof, and is possibly locally extinct there. Most records are however from the remote, arid eastern parts of the Richtersveld that is unsuitable to grazing, and these subpopulations are stable.
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Population trend | Stable |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Nemesia williamsonii K.E.Steiner | Least Concern | Raimondo et al. (2009) | |
Bibliography |
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.
Snijman, D.A. 2013. Plants of the Greater Cape Floristic Region 2: The extra Cape flora. Strelitzia 30. South African National Biodiversity Institute, Pretoria.
Steiner, K.E. 2006. Two new species of Nemesia (Scrophulariaceae) from southern Africa. Bothalia 36(1):39-44.
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Citation |
| von Staden, L. 2015. Nemesia williamsonii K.E.Steiner. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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