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Scientific Name | Annesorhiza filicaulis Eckl. & Zeyh. |
Higher Classification | Dicotyledons |
Family | APIACEAE |
Synonyms | Oenanthe filicaulis (Eckl. & Zeyh.) D.Dietr., Peucedanum filicaule (Eckl. & Zeyh.) B-E.van Wyk & Tilney |
National Status |
Status and Criteria | Endangered B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) |
Assessment Date | 2016/01/19 |
Assessor(s) | L. von Staden & N.A. Helme |
Justification | A rare, highly localized species (EOO 10 km²). One of two known subpopulations is threatened by habitat loss to expanding rooibos tea cultivation. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Olifants River Valley near Clanwilliam. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Graafwater Sandstone Fynbos |
Description | Sandy flats and plateaux. |
Threats |
| Threatened by ongoing habitat loss to rapid expansion of rooibos tea and potato cultivation around Clanwilliam. |
Population |
A very rare species, known from only a few collections (Magee et al. 2011). The first collection, from the early 1800s, is from an unspecified locality in the Olifants River Valley near Clanwilliam, which may be locally extinct due to habitat loss to urban expansion and crop cultivation. Two recent records are from a sandy plateau on the lower slopes of the Cederberg above the Olifants River Valley, where plants are not currently threatened. A second subpopulation was recently discovered on the edge of existing crop fields, and this subpopulation is likely to be impacted by proposed expansion of rooibos tea cultivation.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Annesorhiza filicaulis Eckl. & Zeyh. | EN B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) | 2017.1 | | Annesorhiza filicaulis Eckl. & Zeyh. | Data Deficient (Taxonomically Problematic) | 2012.1 | | Annesorhiza filicaulis Eckl. & Zeyh. | Data Deficient (Taxonomically Problematic) | Raimondo et al. (2009) | |
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.
Magee, A.R., Van Wyk, B.E., Tilney, P.M. and Vessio, N. 2011. A taxonomic revision of the Annesorhiza triternata group (Apiaceae, Apioideae): the transfer of Peucedanum triternatum and P. filicaule and the description of five new species. Systematic Botany 36(2):508-519.
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.
Van Wyk, B.E. and Tilney, P.M. 2001. The generic position of Annesorhiza filicaulis Eckl. & Zeyh. (Apiaceae). Edinburgh Journal of Botany 58:383-387.
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Citation |
| von Staden, L. & Helme, N.A. 2016. Annesorhiza filicaulis Eckl. & Zeyh. National Assessment: Red List of South African Plants version . Accessed on 2025/05/11 |
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