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Scientific Name | Hexacyrtis dickiana Dinter |
Higher Classification | Monocotyledons |
Family | COLCHICACEAE |
National Status |
Status and Criteria | Endangered* B1ab(iii,v)+2ab(iii,v) |
Assessment Date | 2015/05/14 |
Assessor(s) | D. Raimondo & P.C.V. Van Wyk |
Justification | Plants at one known location in South Africa are declining due to ongoing habitat degradation as a result of overgrazing and mining. This taxon therefore qualifies for Critically Endangered under Criterion B, however it is widespread and not threatened in Namibia, the national status is downgraded by one category following IUCN regional assessment procedures. |
Distribution |
Endemism | Not endemic to South Africa |
Provincial distribution | Northern Cape |
Range | Swakopmund to the lower Gariep Valley inland of Alexander Bay. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Western Gariep Lowland Desert |
Description | Coastal dunes and inland sand plumes. |
Threats |
| Threatened in South Africa by habitat degradation due to overgrazing. The only known subpopulation in South Africa is in an area that is severely overstocked with livestock, with stocking rates nearly doubling in the past five years. It is also adjacent to an open-cast mine, which is leading to widespread disturbance as a result of dust blowing from exposed mine dumps over the surrounding plains. In Namibia, it is also threatened by habitat loss to mining along the coast north of the Orange River, but most subpopulations in Namibia are not threatened. |
Population |
There is only one subpopulation of this species in South Africa, which is declining due to ongoing habitat degradation. The South African subpopulation is however continuous with the much larger Namibian population that is not declining, and is likely to benefit from rescue effects.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Hexacyrtis dickiana Dinter | EN* B1ab(iii,v)+2ab(iii,v) | 2015.1 | | Hexacyrtis dickiana Dinter | Least Concern | Raimondo et al. (2009) | | Hexacyrtis dickiana Dinter | Not Threatened | Hilton-Taylor (1996) | |
Bibliography |
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.
Snijman, D.A. 2013. Plants of the Greater Cape Floristic Region 2: The extra Cape flora. Strelitzia 30. South African National Biodiversity Institute, Pretoria.
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Citation |
| Raimondo, D. & Van Wyk, P.C.V. 2015. Hexacyrtis dickiana Dinter. National Assessment: Red List of South African Plants version . Accessed on 2025/05/13 |
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