Taxonomy
Scientific Name
Annesorhiza laticostata Magee
Higher Classification
Dicotyledons
Family
APIACEAE
National Status
Status and Criteria
Critically Endangered B1ab(iii)+2ab(iii)
Assessment Date
2013/01/30
Assessor(s)
L. von Staden
Justification
One known location is threatened by habitat degradation due to infrastructure development and competition from alien invasive plants.
Distribution
Endemism
South African endemic
Provincial distribution
Western Cape
Range
Breede River Valley between Worcester and Rawsonville.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Breede Alluvium Fynbos
Description
Alluvial sands, on gentle slopes.
Threats
This species is currently known from one small fragment. Parts of this site is already disturbed through gravel quarrying and road construction, and it is surrounded by crop fields as well as bordered by the Brandvlei Dam. It is potentially threatened by habitat loss to further infrastructure development as well as invasive alien plants spreading from the river valley below. This species may have been more widespread in the past, but was only recently discovered, and this subpopulation is quite likely the only one remaining as surrounding areas are extensively transformed, predominantly for vineyard cultivation.
Population
Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Annesorhiza laticostata MageeCR B1ab(iii)+2ab(iii)2013.1
Bibliography

Magee, A.R., Van Wyk, B.E., Tilney, P.M. and Vessio, N. 2011. A taxonomic revision of the Annesorhiza triternata group (Apiaceae, Apioideae): the transfer of Peucedanum triternatum and P. filicaule and the description of five new species. Systematic Botany 36(2):508-519.


Citation
von Staden, L. 2013. Annesorhiza laticostata Magee. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2021/09/26

Comment on this assessment Comment on this assessment
Distribution map


Search for images of Annesorhiza laticostata on iNaturalist