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Scientific Name | Ixia curta Andrews |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Ixia monadelpha D.Delaroche var. curta (Andrews) Ker Gawl., Morphixia curta (Andrews) Klatt |
National Status |
Status and Criteria | Endangered B1ab(ii,iii,iv,v) |
Assessment Date | 2015/06/30 |
Assessor(s) | P. Goldblatt & L. von Staden |
Justification | EOO 786 km², between seven and nine severely fragmented subpopulations remain, and continue to decline due to ongoing habitat degradation and competition from alien invasive plants. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Darling to Malmesbury. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Saldanha Flats Strandveld, Swartland Shale Renosterveld, Swartland Granite Renosterveld, Atlantis Sand Fynbos |
Description | Seasonally waterlogged sandy flats. |
Threats |
| More than 60% of this species' habitat has been lost to crop cultivation, and only isolated fragments remain. Plants on these remaining fragments continue to be threatened by overgrazing, competition from unmanaged alien invasive plants, and inappropriate fire management. Use of pesticides and fertilizer in surrounding crop fields is causing a decline in pollinators and nutrient enrichment of habitat patches, which particularly encourages the spread of alien invasive grasses. |
Population |
This species is known from recent records from seven small, isolated remnants, where all subpopulations are small. Intact habitat remains at two other locations known from historical records, but the species has not been seen in these well-surveyed sites since the 1980s, and is possibly already locally extinct.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Ixia curta Andrews | EN B1ab(ii,iii,iv,v) | 2015.1 | | Ixia curta Andrews | VU B1ab(ii,iii,iv,v) | Raimondo et al. (2009) | | Ixia curta Andrews | Vulnerable | Hilton-Taylor (1996) | | Ixia curta Andrews | Vulnerable | 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. 2000. Cape Plants: A conspectus of the Cape Flora of South Africa. Strelitzia 9. National Botanical Institute, Cape Town.
Goldblatt, P. and Manning, J.C. 2016. Systematics of the southern African genus Ixia L. (Iridaceae): 5. Synopsis of section Ixia, including five new species. South African Journal of Botany 104:175-198.
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.
Lewis, G.J. 1962. South African Iridaceae. The genus Ixia. Journal of South African Botany 28:45-195.
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. 2015. Ixia curta Andrews. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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