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Scientific Name | Tylecodon tuberosus Toelken |
Higher Classification | Dicotyledons |
Family | CRASSULACEAE |
National Status |
Status and Criteria | Vulnerable D2 |
Assessment Date | 2015/05/13 |
Assessor(s) | L. von Staden |
Justification | A rare, localized species, known from one, possibly two locations, and potentially threatened by habitat degradation due to overgrazing. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Northern Cape |
Range | Steinkopf. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Namaqualand Blomveld |
Description | Shaded rock crevices on upper south-facing quartzitic slopes and ridges, 900-1100 m. |
Threats |
| Potentially threatened by habitat degradation due to overgrazing, and trampling by livestock. |
Population |
A rare and very poorly known species. It is cryptic and easily overlooked, and more surveys are needed to better determine the size and extent of the population.
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Population trend | Stable |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Tylecodon tuberosus Toelken | VU D2 | 2015.1 | | Tylecodon tuberosus Toelken | Rare | 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.
Tölken, H.R. 1978. New taxa and new combinations in Cotyledon and allied genera. Bothalia 12(3):377-393.
Tölken, H.R. 1985. Crassulaceae. In: O.A. Leistner (ed). Flora of southern Africa 14,1:1-244. Botanical Research Institute, Pretoria.
Van Jaarsveld, E.J. and Koutnik, D. 2004. Cotyledon and Tylecodon. Umdaus Press, Pretoria.
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Citation |
| von Staden, L. 2015. Tylecodon tuberosus Toelken. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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