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Scientific Name | Isolepis sororia Kunth |
Higher Classification | Monocotyledons |
Family | CYPERACEAE |
Synonyms | Scirpus sororius (Kunth) C.B.Clarke |
National Status |
Status and Criteria | Least Concern |
Assessment Date | 2018/09/30 |
Assessor(s) | M. Muasya, D. Raimondo & L. von Staden |
Justification | Isolepis sororia is a widespread, but very poorly known species that is possibly overlooked, and more common than records suggest. It is not suspected to be in danger of extinction. It has an extent of occurrence (EOO) of 23 574 km², and is listed as Least Concern. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Eastern Cape, Western Cape |
Range | This species is endemic to South Africa, and occurs from the Little Karoo and eastern Overberg in the Western Cape to Uitenhage in the Eastern Cape. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Breede Alluvium Renosterveld, Breede Alluvium Fynbos, Albany Alluvial Vegetation, Western Little Karoo, Mossel Bay Shale Renosterveld, Garden Route Shale Fynbos, Garden Route Granite Fynbos, Goukamma Dune Thicket |
Description | It grows in moist depressions in shallow soils at the margins of seasonal streams. |
Threats |
| Isolepis sororia has lost more than 30% of its habitat to crop cultivation and urban expansion. Habitat loss and degradation continues, particularly in the eastern Overberg, where there has been significant expansion of crop fields over the past 30 years. |
Population |
This is a widespread, but localized habitat specialist that is easily overlooked. It is known from only a few records, but likely to be more common. This species is an annual, and may be resilient to disturbance. The impact of ongoing habitat loss and degradation on the population is not known.
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Population trend | Unknown |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Isolepis sororia Kunth | Least Concern | Raimondo et al. (2009) | |
Bibliography |
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.
Muasya, A.M. and Simpson, D.A. 2002. A monograph of the genus Isolepis R.Br. (Cyperaceae). Kew Bulletin 57(2):257-362.
Muasya, A.M., Viljoen, J. and Stirton, C.H. 2011. Isolepis namaquana (Cypereae, Cyperaceae), a new endemic species from the winter rainfall area of South Africa. South African Journal of Botany 77(1):55-58.
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 |
| Muasya, M., Raimondo, D. & von Staden, L. 2018. Isolepis sororia Kunth. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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