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Scientific Name | Drosanthemum flavum (Haw.) Schwantes |
Higher Classification | Dicotyledons |
Family | AIZOACEAE |
Synonyms | Mesembryanthemum flavum Haw. |
National Status |
Status and Criteria | Endangered B1ab(i,ii,iii,iv,v); C2a(i) |
Assessment Date | 2012/12/12 |
Assessor(s) | N.A. Helme, D. Raimondo, C. Klak & L. von Staden |
Justification | A very rare, range-restricted (EOO 1688 km²) species, known from eight small, severely fragmented subpopulations, each consisting of no more than 100 mature individuals. The population, estimated to number fewer than 550 mature individuals, continue to decline due to ongoing habitat loss and degradation due to overgrazing, too infrequent fire and competition from alien invasive plants. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Western Overberg between Bot River, Swellendam and Bredasdorp. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Breede Shale Renosterveld, Central Ruens Shale Renosterveld, Western Ruens Shale Renosterveld, Greyton Shale Fynbos, Swellendam Silcrete Fynbos |
Description | Clay soils in rocky shale outcrops. |
Threats |
| Less than 15% of this species' lowland renosterveld habitat remains in small, isolated fragments due to extensive loss to crop cultivation. Remaining subpopulations continue to be threatened by ongoing habitat loss and degradation due to overgrazing, fire exclusion and competition from unmanaged alien invasive plants. |
Population |
A very rarely recorded species. All eight known remaining subpopulations occur on tiny isolated fragments of renosterveld - generally areas too steep or rocky to plough. Subpopulations are small, most consisting of fewer than 50 mature individuals, and the largest subpopulation has no more than 100 mature individuals.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Drosanthemum flavum (Haw.) Schwantes | EN D | Raimondo et al. (2009) | |
Bibliography |
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.
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.
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Citation |
| Helme, N.A., Raimondo, D., Klak, C. & von Staden, L. 2012. Drosanthemum flavum (Haw.) Schwantes. National Assessment: Red List of South African Plants version . Accessed on 2025/05/14 |
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