Taxonomy
Scientific Name
Agathosma bicornuta R.A.Dyer
Higher Classification
Dicotyledons
Family
RUTACEAE
National Status
Status and Criteria
Endangered A2ac; B1ab(i,ii,iii,iv,v)
Assessment Date
2006/01/17
Assessor(s)
A.P. Dold, T. Trinder-Smith & J.E. Victor
Justification
A population reduction of at least 50% is estimated based on the local extinction of 50% of subpopulations known through historical records due to overgrazing and too frequent fire in the past 40 years (generation length 20 years). EOO <600 km², four remaining locations continue to decline due to ongoing habitat degradation as a result of overgrazing.
Distribution
Endemism
South African endemic
Provincial distribution
Eastern Cape
Range
Grahamstown.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Saltaire Karroid Thicket, Grahamstown Grassland Thicket, Albany Bontveld
Description
Transition between grassy fynbos (on Ecca quartz) and Nama Karoo (on Dwyka formation) on south-facing ridges.
Threats
At least two subpopulations have been lost to severe habitat degradation as a result of overstocking of rangelands with goats and too frequent burning of rangelands.
Population

Plants occur in small, scattered subpopulations localized to ecotones.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Agathosma bicornuta R.A.DyerEN A2ac; B1ab(i,ii,iii,iv,v)Raimondo et al. (2009)
Bibliography

Bolus Herbarium. The genus Agathosma, specimen data from the Bolus Herbarium Collections database. University of Cape Town, Cape Town. Downloaded on 2007.


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
Dold, A.P., Trinder-Smith, T. & Victor, J.E. 2006. Agathosma bicornuta R.A.Dyer. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2022/01/25

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Distribution map

© A.P. Dold


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