Acanthopsis insueta

Taxonomy
Scientific Name
Acanthopsis insueta H.M.Steyn
Higher Classification
Dicotyledons
Family
ACANTHACEAE
National Status
Status and Criteria
Critically Rare
Assessment Date
2017/04/10
Assessor(s)
L. von Staden & H.M. Steyn
Justification
A highly localized Richtersveld endemic (EOO <10 km²). Its habitat is well-protected and it is not in danger of extinction.
Distribution
Endemism
South African endemic
Provincial distribution
Northern Cape
Range
Southern Richtersveld, Vyftienmyl-se-Berg.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Succulent Karoo
Description
Well-drained sandy soils among quartzite rocks on mountain slopes and summits, 230-450 m.
Threats
There are no severe threats to this species. Its entire range falls within a formally protected area. Elsewhere in the Richtersveld overstocking of communal rangelands have led to severe degradation of the natural vegetation, with a significant loss of plant species diversity in many places. The site where this species occurs is however fenced off and livestock is kept out to protect the many local endemics to this mountain. The site is targeted for illegal wild collection of plants for sale in the specialist horticultural market. Acanthopsis species are however not targeted by collectors, and plant collection is unlikely to be a threat.
Population

This species is known from a small area on the northern section of the summit of Vyftienmyl-se-Berg. This inselberg is known for its many local endemics, and is therefore likely that it is endemic to this mountain. As there are no severe threats, the population is not suspected to be declining.


Population trend
Stable
Bibliography

Steyn, H.M. and Van Wyk, A.E. 2017. Taxonomic notes on Acanthopsis (Acanthaceae, tribe Acantheae): the group with semi-dense spikes and 5-fid bracts. Phytotaxa 324(2):101-121.


Citation
von Staden, L. & Steyn, H.M. 2017. Acanthopsis insueta H.M.Steyn. 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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