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Scientific Name | Ixia longistylis (M.P.de Vos) Goldblatt & J.C.Manning |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Ixia polystachya L. var. longistylis M.P.de Vos |
National Status |
Status and Criteria | Critically Endangered B1ab(i,ii,iii,iv,v) |
Assessment Date | 2015/06/13 |
Assessor(s) | L. von Staden |
Justification | EOO 38 km², two, possibly three isolated subpopulations remain after extensive habitat loss and fragmentation, and continues to decline due to ongoing habitat loss and degradation. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Breede River Valley between Worcester and Rawsonville. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Breede Alluvium Fynbos |
Description | Well-drained, sandy alluvial flats. |
Threats |
| Less than 40% of this species' habitat remains intact after extensive loss to urban and agricultural expansion. Remaining fragments are often severely degraded due to grazing, a lack of fire and unmanaged alien invasive plants. Plants at one known location, where the species was last recorded in 1982, are likely to be lost to urban expansion in the near future. Other collections are from areas now mostly converted to vineyards, and it is uncertain whether any plants survive. |
Population |
This species is known from only a few collections, and was last recorded in 1986. It is a highly localized endemic of Breede Alluvium Fynbos. Surveys of remaining habitat fragments are urgently needed to confirm remaining extant populations. Known records are from isolated remnants of natural vegetation, and many are likely already locally extinct.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Ixia longistylis (M.P.de Vos) Goldblatt & J.C.Manning | CR B1ab(i,ii,iii,iv,v) | 2017.1 | | Ixia polystachya L. var. longistylis M.P.de Vos | CR B1ab(i,ii,iii,iv,v) | 2015.1 | | Ixia polystachya L. var. longistylis M.P.de Vos | Threatened | Raimondo et al. (2009) | |
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. 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.
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 |
| von Staden, L. 2015. Ixia longistylis (M.P.de Vos) Goldblatt & J.C.Manning. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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