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Scientific Name | Syringodea derustensis M.P.de Vos |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
National Status |
Status and Criteria | Vulnerable B1ab(ii,iii,iv,v)+2ab(ii,iii,iv,v) |
Assessment Date | 2020/01/17 |
Assessor(s) | J.H. Vlok & D. Raimondo |
Justification | A range-restricted species (EOO 592 km²) known from less than 10 locations. It has experienced past loss to urban expansion and crop cultivation around De Rust and to dam construction in Dysselsdorp. Decline is ongoing due to informal housing expansion around De Rust. This species is also potentially threatened by ostrich farming. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | This species is endemic to the Western Cape Province, South Africa, where it occurs from Oudtshoorn to De Rust. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Mons Ruber Fynbos Thicket, Gamka Valley Thicket, Oudshoorn Karroid Thicket, Muscadel Riviere |
Description | Stony hills in succulent karoo vegetation. |
Threats |
| Major populations around De Rust were exterminated by urban and agricultural developments in the past, it also lost habitat and a subpopulation to Dam building in Dysselsdorp.
Subpopulations around De Rust are still declining as the commonage is not well managed and part of the land has recently been lost through (illegal) informal housing. (J. Vlok 2008 pers. comm.)
The other populations on private land are potentially threatened by the ostrich industry. |
Population |
Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Syringodea derustensis M.P.de Vos | VU B1ab(ii,iii,iv,v) | Raimondo et al. (2009) | | Syringodea derustensis M.P.de Vos | Vulnerable | Hilton-Taylor (1996) | | Syringodea derustensis M.P.de Vos | Rare | Hall et al. (1980) | |
Bibliography |
De Vos, M.P. 1983. Syringodea, Romulea. In: O.A. Leistner (ed). Flora of Southern Africa 7 Iridaceae, Part 2 Ixioideae, Fascicle 2:1-73. Botanical Research Institute, Pretoria.
Goldblatt, P. and Manning, J.C. 2000. Cape Plants: A conspectus of the Cape Flora of South Africa. Strelitzia 9. National Botanical Institute, Cape Town.
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.
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.
Vlok, J. and Schutte-Vlok, A.L. 2010. Plants of the Klein Karoo. Umdaus Press, Hatfield.
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Citation |
| Vlok, J.H. & Raimondo, D. 2020. Syringodea derustensis M.P.de Vos. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2022/05/20 |
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