Taxonomy
Scientific Name
Erica binaria E.G.H.Oliv.
Higher Classification
Dicotyledons
Family
ERICACEAE
National Status
Status and Criteria
Vulnerable D2
Assessment Date
2018/05/29
Assessor(s)
L. von Staden
Justification
Erica binariais a highly localized habitat specialist, known from three locations and potentially threatened by competition from alien invasive plants.
Distribution
Endemism
South African endemic
Provincial distribution
Western Cape
Range
This species is endemic to the mountains of the Western Cape, where it is known from isolated subpopulations in Jonkershoek, Simonsberg and the Riviersonderend mountains.
Habitat and Ecology
Major system
Terrestrial
Major habitats
North Sonderend Sandstone Fynbos, Kogelberg Sandstone Fynbos
Description
It is localized to rocky summit ridges, 1200-1700 m.
Threats
This species is potentially threatened by competition from alien invasive plants at all three locations. Dense, unmanaged infestations of escaped pine seedlings have been spreading rapidly on the slopes of Simonsberg and the southern slopes of the Riviersonderend Mountains. Scattered pines are already present in this species' habitat at the summit of Jonaskop in the Riviersonderend Mountains. The lower slopes of the Jonkershoek Valley at Stellenbosch is also under timber plantations, but thus far alien invasions have been managed.
Population

This highly localized endemic is currently known from three widely separated subpopulations. It is a habitat specialist of summit ridges, and may be overlooked in more inaccessible areas. The population is not suspected to be declining, but it could rapidly increase its risk of extinction if alien invasive plants are not urgently cleared.


Population trend
Stable
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Erica binaria E.G.H.Oliv.Least Concern Raimondo et al. (2009)
Bibliography

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.


Manning, J.C. and Goldblatt, P. 2012. Plants of the Greater Cape Floristic Region 1: The Core Cape Flora. Strelitzia 29. South African National Biodiversity Institute, Pretoria.


Oliver, E.G.H. 2000. Systematics of Ericeae (Ericaceae-Ericoideae): species with indehiscent and partially indehiscent fruits. Contributions from the Bolus Herbarium 19:1-483.


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
von Staden, L. 2018. Erica binaria E.G.H.Oliv. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2020/10/28

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Distribution map


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