Oxalis lineolata

Taxonomy
Scientific Name
Oxalis lineolata T.M.Salter
Higher Classification
Dicotyledons
Family
OXALIDACEAE
National Status
Status and Criteria
Endangered B1ab(i,ii,iii)+2ab(i,ii,iii); C2a(ii)
Assessment Date
2016/02/25
Assessor(s)
K.C. Oberlander & D. van der Colff
Justification
A range-restricted species (EOO and AOO of less than 20 km²) and only known from three locations, within a small area around Doornbosch. There is continuous decline as a result of habitat loss due to expanding crop cultivation. The species is estimated to have a population size between 150-300 individuals.
Distribution
Endemism
South African endemic
Provincial distribution
Western Cape
Range
Doring River Valley east of Clanwilliam.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Doringrivier Quartzite Karoo
Description
Dry shale flats.
Threats
Known from three locations through historical collections, however, recently recorded at only one of these locations and it is threatened by habitat loss due to continued expanding crop cultivation. It has not been recorded at the other two location since 1935 and 1979 respectively, after repeated searches by Oxalis experts K. Oberlander and L. Dreyer. However, there is still available habitat with no known threats at these locations, hence the species might still be present.
Population

All plants at the three locations are considered to be part of a single subpopulation as the distance between these locations are very small and gene flow by means of pollination and seed dispersal is possible. A population estimate of the one location range from 50-100 individuals, hence we extrapolate that the other two locations might have a similar number of plants, giving a total population estimate of 150-300 individuals.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Oxalis lineolata T.M.SalterData Deficient Raimondo et al. (2009)
Oxalis lineolata T.M.SalterIndeterminate 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.


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.


Citation
Oberlander, K.C. & van der Colff, D. 2016. Oxalis lineolata T.M.Salter. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2017/04/28

Comment on this assessment Comment on this assessment
Distribution map

© I. Ebrahim


Search for images of Oxalis lineolata on iSpot