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Scientific Name | Tritonia squalida (Aiton) Ker Gawl. |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Ixia hyalina in sense of DC., not of L.f. (misapplied name), Ixia similis Salisb. (in part) (excluding synonym I. hyalina ), Ixia squalida Aiton, Ixia squalida Aiton var. patula Aiton, Tritonixia squalida (Aiton) Klatt |
National Status |
Status and Criteria | Near Threatened B1ab(ii,iii,v)+2ab(ii,iii,v) |
Assessment Date | 2021/07/09 |
Assessor(s) | D. Raimondo & T. Patel |
Justification | It is known from between 11-15 locations. The species is declining due to agricultural activities around Albertinia and dense encroachment by invasive alien acacias throughout its range. Additionally, there is a slow but continuing decline resulting from urban expansion around Albertinia and Still Bay. Therefore, it is listed as Near Threatened, almost meeting criteria B to be listed as Vulnerable. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | This species is a local endemic of the south coast of Western Cape, South Africa, between Riversdale, Albertinia and Still Bay. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Albany Thicket, Fynbos |
Description | It occurs on stony laterite and calcareous soils, often in crevices in rock pavement or outcrops. |
Threats |
| This species has lost 29% of its habitat (calculated using landcover data in GIS). It is threatened by ongoing habitat loss, degradation and fragmentation as a result of urban and agricultural expansion and competition from alien invasive plants. |
Population |
There is no information about the subpopulation sizes of this species, except for one in Still Bay that was recorded in 2012, which had between 50 and 100 plants. The population trend is inferred to be declining due to ongoing habitat loss and degradation
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Tritonia squalida (Aiton) Ker Gawl. | NT B1ab(ii,iii,v) | Raimondo et al. (2009) | |
Bibliography |
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. 2020. Iridaceae of southern Africa. Strelitzia 42. South African National Biodiversity 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.
Vlok, J. and Schutte-Vlok, A.L. 2010. Plants of the Klein Karoo. Umdaus Press, Hatfield.
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Citation |
| Raimondo, D. & Patel, T. 2021. Tritonia squalida (Aiton) Ker Gawl. National Assessment: Red List of South African Plants version . Accessed on 2025/05/13 |
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