|
Scientific Name | Sorocephalus teretifolius (Meisn.) E.Phillips |
Higher Classification | Dicotyledons |
Family | PROTEACEAE |
Common Names | Pinhead Clusterhead (e) |
National Status |
Status and Criteria | Endangered B1ab(iii,v)+2ab(iii,v) |
Assessment Date | 2019/01/30 |
Assessor(s) | A.G. Rebelo & D. Raimondo |
Justification | Sorocephalus teretifolius is a species with a restricted range, it has an extent of occurrence (EOO) of 152 km², and an area of occupancy (AOO) of 52 km². The population continues to decline at four known locations due to alien pine and hakea invasion. It therefore qualifies for listing as Endangered under criterion B. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | This species is endemic to the Western Cape Province, South Africa, where it occurs from the Du Toit's Kloof Mountains to Blokkop. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Hawequas Sandstone Fynbos |
Description | It grows on rocky, dry, high-altitude slopes, 1500-1850 m. Mature individuals are killed by fires, and only seeds survive. Seeds are released after ripening, and dispersed by ants to their underground nests, where they are protected from predation and fire. It is pollinated by insects. |
Threats |
| Its habitat is currently experiencing ongoing decline as a result of the spread of invasive hakea and pine species. |
Population |
This is a rare taxon, that mostly occurs as small isolated subpopulations of less than 20 plants across a 21 km range. Only one large subpopulation is known from Blokkop where there are several hundred individuals. The population is declining due to competition with invasive alien plant species.
|
Population trend | Decreasing |
Conservation |
| All subpopulations are in the Theewaters and Hawekwas nature reserves. |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Sorocephalus teretifolius (Meisn.) E.Phillips | EN B1ab(i,ii,iii,iv,v)c(iv)+2ab(i,ii,iii,iv,v)c(iv) | Raimondo et al. (2009) | | Sorocephalus teretifolius (Meisn.) E.Phillips | Rare | Hilton-Taylor (1996) | | Sorocephalus teretifolius (Meisn.) E.Phillips | Rare | Hall et al. (1980) | |
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.
Hall, A.V., De Winter, M., De Winter, B. and Van Oosterhout, S.A.M. 1980. Threatened plants of southern Africa. South African National Scienctific Programmes Report 45. CSIR, Pretoria.
Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.
Manning, J.C. and Goldblatt, P. 2012. Plants of the Greater Cape Floristic Region 1: The Core Cape Flora. Strelitzia 29. 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.
Rebelo, T. 2001. Sasol Proteas: A field guide to the proteas of southern Africa. (2nd ed.). Fernwood Press, Vlaeberg, Cape Town.
|
Citation |
| Rebelo, A.G. & Raimondo, D. 2019. Sorocephalus teretifolius (Meisn.) E.Phillips. National Assessment: Red List of South African Plants version . Accessed on 2025/06/15 |
Comment on this assessment
