Taxonomy
Scientific Name
Othonna ciliata L.f.
Higher Classification
Dicotyledons
Family
ASTERACEAE
National Status
Status and Criteria
Vulnerable B1ab(iii,v)
Assessment Date
2018/09/27
Assessor(s)
L. von Staden
Justification
EOO 5342 km², 10 severely fragmented subpopulations continue to decline due to ongoing habitat loss and degradation.
Distribution
Endemism
South African endemic
Provincial distribution
Western Cape
Range
Ceres to the Cape Peninsula and Sir Lowry's Pass.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Swartland Shale Renosterveld, Swartland Granite Renosterveld, Swartland Silcrete Renosterveld, Cape Winelands Shale Fynbos, Boland Granite Fynbos, Cape Flats Sand Fynbos, Atlantis Sand Fynbos, Swartland Alluvium Fynbos, Lourensford Alluvium Fynbos, Ceres Shale Renosterveld, Peninsula Granite Fynbos
Description
Shales and sandy flats.
Threats
This species has lost >75% of its habitat to urban and agricultural expansion, and habitat loss continues. Subpopulations on small remnants are threatened by competition from unmanaged alien invasive plants, overgrazing, and inappropriate fire management.
Population

Recent field observations indicate that this species persists at 14 locations. There are 10 subpopulations, the largest is on the Tygerberg and consists of 500-700 plants. Other subpopulations are much smaller, consisting of between 10 and 100 plants, and all are isolated, and therefore the population is considered severely fragmented. The population continues to decline due to ongoing habitat loss and degradation.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Othonna ciliata L.f.VU B1ab(ii,iii,v)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.


Harvey, W.H. 1894. Compositae. In: W.H. Harvey and O.W. Sonder (eds). Flora Capensis III (Rubiaceae to Campanulaceae):44-530. L. Reeve & Co., Ltd., Ashford.


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.


Citation
von Staden, L. 2018. Othonna ciliata L.f. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2022/05/24

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Distribution map


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