Taxonomy
Scientific Name
Othonna petiolaris DC.
Higher Classification
Dicotyledons
Family
ASTERACEAE
National Status
Status and Criteria
Near Threatened B1ab(iii)+2ab(iii)
Assessment Date
2018/10/03
Assessor(s)
D. Raimondo & L. von Staden
Justification
Othonna petiolaris has an extent of occurrence (EOO) of 3195 km², and an area of occupancy (AOO) of less than 1000 km². Between 16 and 20 locations continue to decline due to ongoing habitat loss. This species is listed as Near Threatened under criterion B.
Distribution
Endemism
South African endemic
Provincial distribution
Northern Cape, Western Cape
Range
It is endemic to South Africa, and is found in Gifberg and northern Cederberg.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Graafwater Sandstone Fynbos, Cederberg Sandstone Fynbos, Nardouw Sandstone Fynbos, Agter-Sederberg Shrubland, Klawer Sandy Shrubland, Swartruggens Quartzite Fynbos
Description
Othonna petiolaris occurs in sandy flats and gentle slopes, sometimes near boulders.
Threats
This species has lost 36% of its habitat to crop cultivation and rapid loss continues.
Population

There is no information available on the population of this species.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Othonna petiolaris DC.NT B1ab(iii)+2ab(iii)2020.1
Othonna petiolaris DC.EN B1ab(ii,iii,iv,v)Raimondo et al. (2009)
Othonna petiolaris DC.Lower Risk - Least Concern Victor (2002)
Othonna petiolaris DC.Insufficiently Known Hilton-Taylor (1996)
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.


Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.


Magoswana, S.L. 2017. Systematics of geophytic Othonna (Senecioneae, Othonninae). Unpublished M.Sc., University of the Western Cape, Cape Town.


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.


Victor, J.E. 2002. South Africa. In: J.S. Golding (ed), Southern African plant Red Data Lists. Southern African Botanical Diversity Network Report 14 (pp. 93-120), SABONET, Pretoria.


Citation
Raimondo, D. & von Staden, L. 2018. Othonna petiolaris DC. National Assessment: Red List of South African Plants version . Accessed on 2024/06/21

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Distribution map


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