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Scientific Name | Tritonia tugwelliae L.Bolus |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
National Status |
Status and Criteria | Least Concern |
Assessment Date | 2021/07/12 |
Assessor(s) | P. Goldblatt, J.C. Manning, D. Raimondo & T. Patel |
Justification | This species is confined to the southern parts of the Great Karoo, with an extent of occurrence (EOO) of 5,622 km² and an area of occupancy (AOO) of 76 km². It is known from between 14 and 16 subpopulations. It is not subject to any severe threats and is therefore considered neither threatened nor rare. Therefore, it is listed as Least Concern. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | It is endemic to the Great Karoo in Western Cape, South Africa, where it occurs between Prince Albert, Leeu-Gamka and Laingsburg. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Koedoesberge-Moordenaars Karoo, Prince Albert Succulent Karoo, Gamka Karoo, Southern Karoo Riviere |
Description | It occurs on dry stony flats, often in seasonal washes and drainage lines. |
Threats |
| This species currently faces no significant threats; however, it may face potential threats in the future due to the spread of invasive alien plant species and degradation caused by grazing livestock |
Population |
It is known from between 14-16 subpopulations, and has a stable population trend. Two records state that plants are rare occurring in stands of fewer than 20 plants. However further surveys are required to confirm whether this species always occurs as small subpopulations.
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Population trend | Stable |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Tritonia tugwelliae L.Bolus | Least Concern | Raimondo et al. (2009) | | Tritonia tugwelliae L.Bolus | Rare | Hilton-Taylor (1996) | |
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. 2020. Iridaceae of southern Africa. Strelitzia 42. South African National Biodiversity Institute, Pretoria.
Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical 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.
Snijman, D.A. 2013. Plants of the Greater Cape Floristic Region 2: The extra Cape flora. Strelitzia 30. South African National Biodiversity Institute, Pretoria.
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Citation |
| Goldblatt, P., Manning, J.C., Raimondo, D. & Patel, T. 2021. Tritonia tugwelliae L.Bolus. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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