Otholobium curtisiae

Taxonomy
Scientific Name
Otholobium curtisiae C.H.Stirt. & Muasya
Higher Classification
Dicotyledons
Family
FABACEAE
National Status
Status and Criteria
Endangered C2a(i)
Assessment Date
2014/05/14
Assessor(s)
O.E. Curtis, L. von Staden & D. Raimondo
Justification
A range-restricted (EOO 394 km²), and very rare species, known from six small subpopulations. The population, estimated to number fewer than 300 mature individuals continue to decline due to ongoing habitat loss and degradation.
Distribution
Endemism
South African endemic
Provincial distribution
Western Cape
Range
Eastern Overberg between Bredasdorp and Heidelberg.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Eastern Rûens Shale Renosterveld, Potberg Ferricrete Fynbos
Description
Quartzitic outcrops within Eastern Rûens Shale Renosterveld.
Threats
Threatened by crop cultivation in the past, and ongoing habitat degradation as a result of livestock overgrazing and inappropriate fire management.
Population

Extensive surveys of suitable quartz habitat across the eastern Overberg indicate that this species is extremely rare and localized, and that subpopulations seldom consist of more than 10 plants (O.E. Curtis pers. comm. 2014). The population is estimated to number fewer than 300 mature individuals, and continues to decline due to ongoing habitat loss and degradation.


Population trend
Decreasing
Conservation
This species is not conserved in any formally protected areas (Curtis et al. 2013).
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Otholobium curtisiae C.H.Stirt. & MuasyaEN C2a(i)2014.1
Bibliography

Curtis, O.E., Stirton, C.H. and Muasya, A.M. 2013. A conservation and floristic assessment of poorly known species rich quartz-silcrete outcrops within Rûens Shale Renosterveld (Overberg, Western Cape), with taxonomic descriptions of five new species. South African Journal of Botany 87:99-111.


Citation
Curtis, O.E., von Staden, L. & Raimondo, D. 2014. Otholobium curtisiae C.H.Stirt. & Muasya. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2019/03/25

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Distribution map

© O.E. Curtis


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