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Scientific Name | Ixia contorta Goldblatt & J.C.Manning |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Ixia rapunculoides Delile var. rigida in sense of G.J.Lewis (1962), but excluding type |
National Status |
Status and Criteria | Near Threatened B1ab(i,iv) |
Assessment Date | 2015/05/19 |
Assessor(s) | D. van der Colff |
Justification | EOO 3467 km², known from at least 11 locations, and declining predominantly in the southern parts of its range due to ongoing habitat loss. Northern subpopulations are protected within the Cederberg Wilderness Area and not threatened. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Cederberg to the Koue Bokkeveld and Touwsrivier. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Winterhoek Sandstone Fynbos, Cederberg Sandstone Fynbos, Matjiesfontein Quartzite Fynbos, Swartruggens Quartzite Fynbos, Kouebokkeveld Alluvium Fynbos |
Description | Well-drained sandy soils, predominantly on flats in sandstone, quartzite and alluvial fynbos. |
Threats |
| Subpopulations on alluvial sandy flats in the Koue Bokkeveld and west of Touwsrivier are threatened by ongoing habitat loss to crop cultivation. Remaining vegetation on the flats west of Touwsrivier is also severely degraded due to overgrazing, and it is not certain whether this species survives in this area, where it was last recorded in 1924. In valleys in the Koue Bokkeveld, some subpopulations may also have been lost to dam construction. |
Population |
Ixia contorta has a narrow distribution range on the arid eastern margin of the fynbos biome, which remains botanically still relatively poorly explored. It is known from at least 11 locations, but it is highly likely that more exist. At least half of known subpopulations are threatened by habitat loss.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Ixia contorta Goldblatt & J.C.Manning | NT B1ab(i,iv) | 2015.1 | |
Bibliography |
Goldblatt, P. and Manning, J.C. 2008. Systematics of the southern African genus Ixia (Iridaceae). 1. The I. rapunculoides complex. Bothalia 38(1):1-22.
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Citation |
| van der Colff, D. 2015. Ixia contorta Goldblatt & J.C.Manning. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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