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Scientific Name | Tritonia dubia Eckl. ex Klatt |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Montbretia dubia (Eckl. ex Klatt) Baker, Tritonia bolusii Baker, Tritonixia bolusii (Baker) Klatt, Tritonixia dubia (Eckl. ex Klatt) Klatt |
National Status |
Status and Criteria | Near Threatened B1b(iii,v)+2b(iii,v) |
Assessment Date | 2021/07/06 |
Assessor(s) | D. Raimondo & T. Patel |
Justification | This species has an extent of occurrence (EOO) of 11 076 km², and an area of occupancy (AOO) of 132 km². It is known from between 15 and 18 locations. It has lost habitat to urban expansion and crop cultivation, which are ongoing threats. In addition, alien plant invasion is causing ongoing degradation to remaining habitat. The species also has a decreasing population trend. It is therefore listed as Near Threatened, almost meeting criteria B to be listed as Vulnerable. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Eastern Cape |
Range | This species is a local endemic in southern Eastern Cape, South Africa, found between Hankey and Paterson. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Albany Thicket, Fynbos |
Description | Plants grow in grassy fynbos and grassy clearings in thicket. |
Threats |
| This species has lost 13% of its habitat (calculated using landcover data in GIS) to crop cultivation and urban expansion, and loss is ongoing. Furthermore, many remaining subpopulations are threatened by competition from alien invasive plants. |
Population |
It is known from between 15 and 18 locations. Field observations made in six subpopulations recently found between 1-10 plants in Westering and near Port Elizabeth, 10-50 plants both between Patensie and Komdono and in Baviaanskloof and 50-100 plants in Uitenhage farms and Booysen Park. The population has a decreasing trend.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Tritonia dubia Eckl. ex Klatt | NT B1ab(ii,iii,iv,v) | Raimondo et al. (2009) | |
Bibliography |
De Vos, M.P. 1999. Tritonia. In: O.A. Leistner (ed). Flora of Southern Africa 7 Iridaceae Part 2: Ixioideae, Fascicle 1: Ixieae:89-128. 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. 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.
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Citation |
| Raimondo, D. & Patel, T. 2021. Tritonia dubia Eckl. ex Klatt. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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