Taxonomy
Scientific Name
Stylapterus ericoides A.Juss. subsp. pallidus R.Dahlgren
Higher Classification
Dicotyledons
Family
PENAEACEAE
National Status
Status and Criteria
Critically Endangered C2a(i); D
Assessment Date
2017/07/17
Assessor(s)
N.A. Helme & L. von Staden
Justification
A highly range-restricted habitat specialist, known from two subpopulations both numbering fewer than 10 mature individuals. One subpopulation is already possibly extinct due to competition from alien invasive plants.
Distribution
Endemism
South African endemic
Provincial distribution
Western Cape
Range
Bain's Kloof and Du Toit's Kloof.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Hawequas Sandstone Fynbos
Description
Bare patches of pure sand along stream banks where competition is slight.
Threats
The subpopulation at the type locality on Bain's Kloof Pass has been badly invaded by alien invasive plants over the past 30 years. Invasive species were cleared about 15 years ago, but have been left unmanaged and are now re-invading the area (N.A. Helme pers. obs. 2016). The subpopulation on Du Toit's Kloof Pass is also potentially threatened by spreading alien invasive plants.
Population

There are two known subpopulations, about 10 km apart. Both subpopulations are small, consisting of fewer than 10 plants. The subpopulation at the type locality in Bain's Kloof was last observed in 2000, when there were only two plants. In 2016, these plants could not be found, the subpopulation has possibly succumbed to competition from alien invasive plants (N.A. Helme pers. obs. 2016).


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Stylapterus ericoides A.Juss. subsp. pallidus R.DahlgrenRare Raimondo et al. (2009)
Stylapterus ericoides A.Juss. subsp. pallidus R.DahlgrenRare Hilton-Taylor (1996)
Stylapterus ericoides A.Juss. subsp. pallidus R.DahlgrenRare Hall et al. (1980)
Bibliography

Dahlgren, R. 1967. Studies on Penaeaceae I. Systematics and gross morphology of the genus Stylapterus A. Juss. Opera Botanica 15:1-40.


Hall, A.V., De Winter, M., De Winter, B. and Van Oosterhout, S.A.M. 1980. Threatened plants of southern Africa. South African National Scienctific Programmes Report 45. CSIR, Pretoria.


Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.


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
Helme, N.A. & von Staden, L. 2017. Stylapterus ericoides A.Juss. subsp. pallidus R.Dahlgren. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2020/07/10

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Distribution map


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