Taxonomy
Scientific Name
Xerophyta adendorffii Behnke
Higher Classification
Monocotyledons
Family
VELLOZIACEAE
National Status
Status and Criteria
Vulnerable B1ab(iii)+2ab(iii)
Assessment Date
2014/05/12
Assessor(s)
L. von Staden
Justification
A very localized species (EOO 93 km²), known from fewer than 10 locations and declining due to ongoing habitat loss and degradation.
Distribution
Endemism
South African endemic
Provincial distribution
Gauteng, North West
Range
Magaliesberg and Witwatersberg ranges between Brits and Lanseria Airport in north-western Gauteng.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Gauteng Shale Mountain Bushveld, Carletonville Dolomite Grassland
Description
Dolomite and quartzite ridges and outcrops.
Threats
This localized species occurs in a rural area on the outskirts of Gauteng Province, and natural vegetation in this area is still relatively intact, with only around 20% currently irreversibly modified. As urban areas continue to expand however, pressure on this species' habitat is likely to increase in future. There is already extensive ongoing residential development around Hartbeespoort Dam, which is likely to impact the population. Competition from alien invasive plants and habitat degradation due to overgrazing are two additional, minor threats.
Population

This species is currently known from only a few collections documented in the literature (Behnke et al. 2013), and appears to be extremely localized. The number and size of subpopulations are however not known, and further surveys are needed to determine the status and trends of the population.


Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Xerophyta adendorffii BehnkeVU B1ab(iii)+2ab(iii)2014.1
Bibliography

Behnke, H.D., Hummel, E., Hillmer, S., Sauer-Gürth, H., Gonzalez, J. and Wink, M. 2013. A revision of African Velloziaceae based on leaf anatomy characters and rbcL nucleotide sequences. Botanical Journal of the Linnean Society 172(1):22-94.


Citation
von Staden, L. 2014. Xerophyta adendorffii Behnke. National Assessment: Red List of South African Plants version . Accessed on 2024/06/14

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Distribution map


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