Senecio holubii

Taxonomy
Scientific Name
Senecio holubii Hutch. & Burtt Davy
Higher Classification
Dicotyledons
Family
ASTERACEAE
National Status
Status and Criteria
Critically Endangered (Possibly Extinct)
Assessment Date
2016/09/27
Assessor(s)
L. von Staden & N. Hahn
Justification
Senecio holubii is a very poorly known species last recorded in 1876. Natural vegetation in the area where it was last seen is severely degraded due to expanding settlements, crop cultivation and overgrazing, and it is possibly extinct.
Distribution
Endemism
South African endemic
Provincial distribution
North West
Range
Zeerust district.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Zeerust Thornveld
Description
Unknown.
Threats
The area where this taxon was collected is now densely populated and extensively cultivated. Overgrazing is also a major cause of degradation and loss of plant diversity within this species' range.
Population

This species is only known from the type specimen, collected in 1876 in a remote area of South Africa near the border with Botswana. This area is botanically relatively poorly explored, and it may be overlooked. However, a recent field survey of rare, endangered and endemic plants of North West province found the area to be severely degraded, and the species could not be relocated (Hahn 2013). The status and trend of the population is not known, and it is possibly extinct, but more field surveys are needed to confirm this.


Population trend
Unknown
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Senecio holubii Hutch. & Burtt DavyData Deficient (Taxonomically Problematic) Raimondo et al. (2009)
Bibliography

Burtt Davy, J. and Hutchinson, J. 1936. New or noteworthy South African plants VIII. New Compositae from the Transvaal. Bulletin of Miscellaneous Information (Royal Botanic Gardens, Kew) 1936(1):80-85.


Hahn, N. 2013. Rare, endangered and endemic flora of the North West Province. Unpublished Report to the Department of Economic Development, Conservation and Tourism, North West Provincial Government.


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. & Hahn, N. 2016. Senecio holubii Hutch. & Burtt Davy. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2017/04/24

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Distribution map


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