Taxonomy
Scientific Name
Othonna rufibarbis Harv.
Higher Classification
Dicotyledons
Family
ASTERACEAE
National Status
Status and Criteria
Vulnerable B1ab(ii,iii,iv,v)+2ab(ii,iii,iv,v)
Assessment Date
2011/06/18
Assessor(s)
D. Raimondo
Justification
A poorly known species, EOO 1 496 km², and historically recorded from four locations, two of which have gone extinct due to the development of the city of Port Elizabeth. Recently recorded from three new locations in the vicinity of Cape St. Francis, it is estimated that between five and 10 locations exist for this species. Decline due to housing development and invasive alien plants is ongoing.
Distribution
Endemism
South African endemic
Provincial distribution
Eastern Cape
Range
Oyster Bay to Addo.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Humansdorp Shale Renosterveld, St Francis Dune Thicket, Sundays Mesic Thicket, Kasouga Dune Thicket
Description
Tertiary sands in coastal habitats and in transition soils between tertiary sands and shale.
Threats
This species has lost habitat and subpopulations in the past to urban development and crop cultivation. Loss of habitat as a result of coastal development is ongoing. Invasive alien plant species threaten subpopulations that occur on tertiary sands.
Population
Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Othonna rufibarbis Harv.Threatened Raimondo et al. (2009)
Bibliography

Bond, P. and Goldblatt, P. 1984. Plants of the Cape flora: a descriptive catalogue. Journal of South African Botany Supp. Vol. 13:1-455.


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
Raimondo, D. 2011. Othonna rufibarbis Harv. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2022/05/20

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Distribution map


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