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Scientific Name | Indigofera psoraloides (L.) L. |
Higher Classification | Dicotyledons |
Family | FABACEAE |
Synonyms | Cytisus psoraloides L., Indigofera complanata Spreng., Indigofera nitida T.M.Salter, Indigofera racemosa L., Indigofera trifoliata L. |
Common Names | Clay Indigo (e) |
National Status |
Status and Criteria | Endangered A2c |
Assessment Date | 2022/11/18 |
Assessor(s) | D. Raimondo, N.A. Helme, R. Koopman & L. von Staden |
Justification | A population reduction of between 70 and 80% is estimated based on at least 83% habitat loss to urban and agricultural expansion over three generations of this long-lived resprouter. Remaining subpopulations occur on small, isolated fragments and continue to decline due to ongoing habitat loss and degradation. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | This species occurs from Tulbagh to the Cape Peninsula and Gordon's Bay. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Cape Flats Dune Strandveld, Swartland Shale Renosterveld, Peninsula Shale Renosterveld, Swartland Granite Renosterveld, Cape Winelands Shale Fynbos, Peninsula Granite Fynbos, Boland Granite Fynbos, Lourensford Alluvium Fynbos, Swartland Alluvium Fynbos |
Description | Plants grow in lowland granite and shale renosterveld, with some records from sandy fynbos. |
Threats |
Around 80% of this species' habitat has already been transformed, predominantly due to urban expansion on the Cape Peninsula, between Paarl and Wellington, and around Malmesbury and Saldanha. Agricultural expansion, particularly vineyards and wheat, has caused further extensive loss around Stellenbosch, and on the lowland flats between Durbanville, Paarl and Stellenbosch. Habitat loss continues, particularly to urban expansion in the Durbanville and Gordon's Bay areas, and a number of remaining subpopulations are also threatened by competition from alien invasive plants. |
Population |
A population reduction of between 70 and 80% is estimated based on 83% habitat loss within three generations of this long-lived resprouter, with an estimated generation length of 50 years. Between 10 and 20 remaining subpopulations occur predominantly on small, isolated fragments and continue to decline due to ongoing habitat loss and degradation.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | Indigofera psoraloides (L.) L. | VU A2c; B1ab(i,ii,iii,iv,v) | 2012.1 | Indigofera psoraloides (L.) L. | VU A2c; B1ab(i,ii,iii,iv,v) | 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.
Manning, J.C. and Goldblatt, P. 2012. Plants of the Greater Cape Floristic Region 1: The Core Cape Flora. Strelitzia 29. South African National Biodiversity 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.
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Citation |
Raimondo, D., Helme, N.A., Koopman, R. & von Staden, L. 2022. Indigofera psoraloides (L.) L. National Assessment: Red List of South African Plants version . Accessed on 2025/02/11 |