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Scientific Name | Oxalis melanograpta T.M.Salter |
Higher Classification | Dicotyledons |
Family | OXALIDACEAE |
National Status |
Status and Criteria | Critically Rare |
Assessment Date | 2012/12/11 |
Assessor(s) | L.L. Dreyer, K.C. Oberlander, D. Raimondo & L. von Staden |
Justification | A rare and localized habitat specialist (EOO <1 km²), but not threatened. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Vanrhynsdorp. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Knersvlakte Shale Vygieveld |
Description | Broken shale outcrop. |
Threats |
| No threats. |
Population |
This species was previously known only from the type collection between Vanrhynsdorp and Vanrhyns Pass, and could not be relocated, despite searches. However, in 2008 it was found growing in association with three other rare Oxalis species on a broken shale outcrop in this area, quite likely the same locality where it was first collected in the 1930s. This site represents a rare, unique habitat within this area, and this species is quite likely restricted to this habitat.
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Population trend | Unknown |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Oxalis melanograpta T.M.Salter | Data Deficient | 2012.1 | | Oxalis melanograpta T.M.Salter | Data Deficient | Raimondo et al. (2009) | | Oxalis melanograpta T.M.Salter | Rare | 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.
Oberlander, K.C., Dreyer, L.L. and Curran, H.R. 2009. An unusual new species of Oxalis (Oxalidaceae) from the Knersvlakte, South Africa. South African Journal of Botany 75(2):239-245.
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., Raimondo, D. & von Staden, L. 2012. Oxalis melanograpta T.M.Salter. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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