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Scientific Name | Sparaxis pillansii L.Bolus |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Common Names | Twisted Satinflower (e) |
National Status |
Status and Criteria | Least Concern |
Assessment Date | 2020/12/29 |
Assessor(s) | P. Goldblatt, L. von Staden & T. Patel |
Justification | This species has an extent of occurrence (EOO) of 1648 km², and an area of occupancy (AOO) of 76 km². It is a locally common species that is not in danger of extinction. It is therefore listed as Least Concern. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Northern Cape |
Range | It is endemic to the Calvinia district in Northern Cape, where it is known in the dolerite hills east of Nieuwoudtville but stretches as far east as Calvinia and the Keiskie mountains southeast of Calvina. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Succulent Karoo |
Description | It occurs in dolerite-derived clay that is waterlogged for most of the growing season, often in standing pools. It also occurs in broken shale along seasonal washes and watercourses. |
Threats |
| A very small proportion of this species' range (<6%) is currently irreversibly modified (calculated using landcover data in GIS), as a result of crop cultivation. Ongoing loss is sporadic, but does not have a severe impact on the population. Recent collections from the Calvinia area has significantly expanded the known range of this species (Goldblatt and Manning 2013), into an area where there is little to no threat. |
Population |
It is abundant around Nieuwoudtville (D. Raimondo pers. obs. 2006) and is known from at least 15 subpopulations. It is however localized to seasonally waterlogged areas. More and more subpopulations are being found further east towards Calvinia, extending the known range of this species. Subpopulations are easily overlooked as they do not flower every year, but it is suspected to also be common in this area where there is no threat (P. Goldblatt pers. comm. 2014). About 1000 plants were observed in Hantam National Botanical Garden in 2014. The population is stable.
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Population trend | Stable |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Sparaxis pillansii L.Bolus | Least Concern | 2015.1 | | Sparaxis pillansii L.Bolus | Rare | Raimondo et al. (2009) | | Sparaxis pillansii L.Bolus | Rare | Hilton-Taylor (1996) | | Sparaxis pillansii L.Bolus | Rare | Hall et al. (1980) | |
Bibliography |
De Vos, M.P. 1999. Ixia. In: O.A. Leistner (ed). Flora of Southern Africa 7 Iridaceae Part 2: Ixioideae, Fascicle 1: Ixieae:3-87. National Botanical Institute, Pretoria.
Goldblatt, P. and Manning, J.C. 2013. Systematics and biology of the Cape genus Sparaxis (Iridaceae). Strelitzia 32. South African National Biodiversity Institute, Pretoria.
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.
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Citation |
| Goldblatt, P., von Staden, L. & Patel, T. 2020. Sparaxis pillansii L.Bolus. National Assessment: Red List of South African Plants version . Accessed on 2025/05/31 |
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