Taxonomy
Scientific Name
Tulbaghia cominsii Vosa
Higher Classification
Monocotyledons
Family
ALLIACEAE
National Status
Status and Criteria
Critically Endangered (Possibly Extinct)
Assessment Date
2011/09/26
Assessor(s)
A.P. Dold, C. McMaster & L. von Staden
Justification
An extremely range-restricted species (EOO 7 km²), the known existing subpopulations of which were all destroyed as a result of a road construction project. Urgent searches are required to determine if any other wild subpopulations survive.
Distribution
Endemism
South African endemic
Provincial distribution
Eastern Cape
Range
King William's Town district.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Bhisho Thornveld
Description
Buffels Thicket.
Threats
Threatened by road construction, quarrying and severe overgrazing. One subpopulation was recently destroyed by quarrying of the dolerite outcrop where it occurs for construction work on the nearby N2 Highway (C. McMaster pers. obs.). Also threatened by urban expansion around King William's Town.
Population

This species has been known since its description in 1979 (Vosa 1979) from an extremely small area to the west of King William's Town. Recently, the subpopulation at the type locality was destroyed as a result of construction work on the N2 (C. McMaster pers. obs.). Another potential site was also bulldozed in the same construction project (A.P. Dold pers. obs.). The only other known subpopulation, known from a historical collection, is unlikely to survive as the area on the banks of the Buffalo River has been extensively transformed and degraded as a result of urban expansion. Urgent searches are required to establish whether any wild individuals of this species survive.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Tulbaghia cominsii VosaVU D22011.1
Tulbaghia cominsii VosaVU D2Raimondo et al. (2009)
Bibliography

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. and Dold, A.P. 2003. Threatened plants of the Albany Centre of Floristic Endemism, South Africa. South African Journal of Science 99:437-446.


Vosa, C.G. 1975. The cytotaxonomy of the genus Tulbaghia. Annali di Botanica 34:104.


Vosa, C.G. 1979. Notes on Tulbaghia: 1. A new species from the eastern Cape and a list of new localities. Journal of South African Botany 45(2):127-132.


Citation
Dold, A.P., McMaster, C. & von Staden, L. 2011. Tulbaghia cominsii Vosa. National Assessment: Red List of South African Plants version . Accessed on 2024/07/18

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Distribution map

© C. McMaster

© C. McMaster


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