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Scientific Name | Oxalis dines Ornduff |
Higher Classification | Dicotyledons |
Family | OXALIDACEAE |
Synonyms | Oxalis disticha Jacq. var. alba T.M.Salter |
National Status |
Status and Criteria | Vulnerable B1ab(iii) |
Assessment Date | 2017/12/08 |
Assessor(s) | H. Mtshali, D. Raimondo, L.L. Dreyer, K.C. Oberlander & N.A. Helme |
Justification | This species has an extent of occurrence (EOO) of 11 324 km², fewer than 20 isolated, severely fragmented subpopulations continue to decline due to habitat degradation as a result of trampling and grazing by livestock. It therefore qualifies as Vulnerable under criterion B. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Northern Cape, Western Cape |
Range | It is distributed from Vanrhynsdorp to Clanwilliam and Calvinia. |
Habitat and Ecology |
Major system | Freshwater |
Major habitats | Tanqua Karoo, Agter-Sederberg Shrubland, Doringrivier Quartzite Karoo, Citrusdal Vygieveld, Vanrhynsdorp Gannabosveld, Namaqualand Granite Renosterveld, Nardouw Sandstone Fynbos, Bokkeveld Sandstone Fynbos, Kouebokkeveld Alluvium Fynbos |
Description | Plants grow in seasonal pools and clay pans. |
Threats |
| There is an ongoing decline of habitat. Heavy grazing and trampling of plants floating in shallow pools observed by N. Helme at the Vanrhynsdorp subpopulation and by D. Raimondo at some Nieuwoudtville subpopulations. Agriculture is a low moderate threat, some farmers do plough up these seasonal pools. This occurred in Nieuwoudtville in 2005, but it is not general practice as crops do not grow well in seasonally inundated areas. |
Population |
Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Oxalis dines Ornduff | VU B1ab(iii) | Raimondo et al. (2009) | | Oxalis dines Ornduff | Insufficiently Known | Hilton-Taylor (1996) | |
Bibliography |
Cook, C.D.K. 2004. Aquatic and wetland plants of southern Africa. Backhuys Publishers, Leiden, The Netherlands.
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.
Sieben, E.J.J. 2009. The status and distribution of vascular plants (Magnoliophyta, Lycophyta, Pteridophyta). In: W.R.T. Darwall, K.G. Smith, D. Tweddle and P. Skelton (eds.), The status and distribution of freshwater biodiversity in southern Africa (pp. 83-98), IUCN and SAIAB, Gland, Switzerland and Grahamstown, South Africa.
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Citation |
| Mtshali, H., Raimondo, D., Dreyer, L.L., Oberlander, K.C. & Helme, N.A. 2017. Oxalis dines Ornduff. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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