Haworthia wittebergensis

Taxonomy
Scientific Name
Haworthia wittebergensis W.F.Barker
Higher Classification
Monocotyledons
Family
ASPHODELACEAE
National Status
Status and Criteria
Rare
Assessment Date
2014/03/25
Assessor(s)
J.H. Vlok, D. Raimondo & L. von Staden
Justification
A range-restricted (EOO 305 km²), but locally fairly common habitat specialist that is not threatened.
Distribution
Endemism
South African endemic
Provincial distribution
Western Cape
Range
Witteberg Mountains to Anysberg.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Fynbos
Description
Quartzite rock crevices in Dry Mountain Fynbos.
Threats
H. wittebergensis is occasionally collected for the succulent trade - a collector was caught once with 500 plants. However, the impact of collecting is sporadic, and with this species being fairly common and most of its habitat inaccessible, collecting is not suspected to be causing severe enough declines to put this species at risk of extinction in the wild. Parts of the habitat is degraded due to overgrazing, but this seems to have little effect on the species (J.H. Vlok pers. obs.).
Population

A narrow endemic, but fairly common in suitable habitat (J.H. Vlok pers. obs.), much of which is poorly explored and inaccessible. It is slow growing and difficult to keep in cultivation (Bayer 1982). Plants are cryptic and the few known records are likely to be an underestimation of the number of subpopulations/locations.


Population trend
Stable
Notes
An indisputably discrete species (Bayer 1982), not easily confused with any other species of Haworthia.
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Haworthia wittebergensis W.F.BarkerRare 2014.1
Haworthia wittebergensis W.F.BarkerLeast Concern 2013.1
Haworthia wittebergensis W.F.BarkerLeast Concern Raimondo et al. (2009)
Haworthia wittebergensis W.F.BarkerRare Hilton-Taylor (1996)
Bibliography

Bayer, M.B. 1982. The new Haworthia handbook. National Botanical Gardens of South Africa.


Bayer, M.B. 1999. Haworthia Revisited: A revision of the genus. Umdaus Press, Hatfield.


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.


Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical 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
Vlok, J.H., Raimondo, D. & von Staden, L. 2014. Haworthia wittebergensis W.F.Barker. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2018/11/19

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Distribution map


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