Nemesia williamsonii

Taxonomy
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.


Population trend
Stable
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Nemesia williamsonii K.E.SteinerLeast 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.


Citation
von Staden, L. 2015. Nemesia williamsonii K.E.Steiner. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2019/04/20

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Distribution map

© G. Laidler

© G. Laidler


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