Taxonomy
Scientific Name
Sebaea rara Wolley-Dod
Higher Classification
Dicotyledons
Family
GENTIANACEAE
National Status
Status and Criteria
Vulnerable B1ab(i,ii,iii,iv,v)
Assessment Date
2018/05/23
Assessor(s)
L. von Staden
Justification
A widespread (EOO 11 467 km²), but very rare species, known from less than 10 locations, and probably locally extinct on the Cape Flats. It continues to decline due to ongoing habitat loss and degradation throughout its range.
Distribution
Endemism
South African endemic
Provincial distribution
Western Cape
Range
Cape Flats to Albertinia.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Albertinia Sand Fynbos, Hangklip Sand Fynbos, Cape Flats Sand Fynbos, Atlantis Sand Fynbos, Swellendam Silcrete Fynbos
Description
Damp sandy flats.
Threats
Threatened by ongoing habitat loss and degradation as a result of urban expansion, which may have already caused the local extinction of this species on the Cape Flats, as well as crop cultivation and competition from alien invasive plants.
Population

An extremely rare and poorly known species. It has been recorded at a few, scattered localities on the Western Cape coastal lowlands, and was last seen in 1977. Plants are small annuals, and may be overlooked. The current population trend is not known, but it is likely to be declining due to extensive, ongoing habitat loss throughout its range. Field surveys are needed to relocate this species in the wild.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Sebaea rara Wolley-DodNT B1ab(ii,iii,iv,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.


Hill, A.W. and Prain, D. 1909. Gentianeae. In: W.T. Thiselton-Dyer (ed). Flora Capensis IV Section I (Vacciniaceae to Gentianeae):1056-1121. Lovell Reeve & Co., Ltd., London.


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.


Marais, W. and Verdoorn, I.C. 1963. Gentianaceae. In: R.A. Dyer, L.E. Codd and H.B. Rycroft (eds). Flora of Southern Africa 26 (Myrsinaceae-Apocynaceae):171-243. Botanical Research 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.


Citation
von Staden, L. 2018. Sebaea rara Wolley-Dod. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2020/10/20

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