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Scientific Name | Chaenostoma titanophilum (Hilliard) Kornhall |
Higher Classification | Dicotyledons |
Family | SCROPHULARIACEAE |
Synonyms | Sutera titanophila Hilliard |
National Status |
Status and Criteria | Vulnerable D2 |
Assessment Date | 2018/05/11 |
Assessor(s) | K.E. Steiner & L. von Staden |
Justification | Chaenostoma titanophilum is known from one location only, with an extent of occurrence (EOO) of less than 10 km². It is potentially threatened by competition from invasive alien wattles. It is therefore listed as Vulnerable under criterion D. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | This species is endemic to the Agulhas Plain in the Western Cape of South Africa, where it occurs in the vicinity of De Hoop Vlei. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | De Hoop Limestone Fynbos |
Description | It is localized to cracks in limestone cliffs. |
Threats |
| Large parts of the southern Cape coast, including the Agulhas Plain, is densely infested with alien invasive plants, which are outcompeting native species. Chaenostoma titanophilum is endemic to a provincial nature reserve, where there is ongoing efforts to control alien invasive plants. This localized species is dependent on effective management of alien invasive plants, and is likely to rapidly increase its risk of extinction, should invasive species increase in density. |
Population |
This species is a localized habitat specialist, known only from a few collections, and last recorded in 1978. Notes on the type specimen indicate that it is locally common. Field surveys are urgently needed to relocate this species in the wild. Monitoring is required to determine the impact of alien invasive plants.
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Population trend | Stable |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Chaenostoma titanophilum (Hilliard) Kornhall | VU D2 | Raimondo et al. (2009) | | Sutera titanophila Hilliard | Rare | Hilton-Taylor (1996) | |
Bibliography |
Hilliard, O.M. 1994. The Manuleae: a tribe of Scrophulariaceae. Edinburgh University Press, Edinburgh.
Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.
Kornhall, P. and Bremer, B. 2005. New circumscription of the tribe Limoselleae (Scrophulariaceae) that includes the taxa of the tribe Manuleeae. Botanical Journal of the Linnean Society 147(3):385-386.
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 |
| Steiner, K.E. & von Staden, L. 2018. Chaenostoma titanophilum (Hilliard) Kornhall. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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