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Scientific Name | Tritonia lancea (Thunb.) N.E.Br. |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
Synonyms | Ixia lancea Thunb., Ixia pectinata Vahl, Montbretia lacerata Baker var. pectinata (Vahl) Baker, Tritonia crispa (L.f.) Ker Gawl. var. pectinata (Vahl) Baker, Tritonia pectinata (Vahl) Ker Gawl. |
National Status |
Status and Criteria | Endangered B1ab(iii)+2ab(iii) |
Assessment Date | 2021/07/08 |
Assessor(s) | R.C. Turner, P.A. Manyama, D.A. Kamundi & T. Patel |
Justification | This Piketberg endemic has an extent of occurrence (EOO) of 92 km², and an area of occupancy (AOO) of 20 km². It is known from three locations where it is threatened by fruit and protea orchards on the plateau and by invasive alien pines on the slopes. It is therefore listed as Endangered under criteria B. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | This species is a local endemic of upper elevations of the Piketberg in Western Cape, South Africa. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Swartland Shale Renosterveld, Piketberg Sandstone Fynbos |
Description | It occurs on sandstone slopes and plateaus in fynbos, flowering mainly after fire. |
Threats |
| This species has lost 39% of its habitat (calculated using landcover data in GIS) to fruit and Protea orchards throughout the Piketberg mountains, especially on the plateau. (R.C. Turner, pers. obs.). It is also affected by invasive alien vegetation: Pine and Acacia throughout the Piketberg Mountains. |
Population |
It is known from three locations, and 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 lancea (Thunb.) N.E.Br. | EN B1ab(iii) | 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. 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 |
| Turner, R.C., Manyama, P.A., Kamundi, D.A. & Patel, T. 2021. Tritonia lancea (Thunb.) N.E.Br. National Assessment: Red List of South African Plants version . Accessed on 2025/07/02 |
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