Taxonomy
Scientific Name
Aneilema longirrhizum Faden
Higher Classification
Monocotyledons
Family
COMMELINACEAE
National Status
Status and Criteria
Near Threatened B1ab(iii)
Assessment Date
2008/03/26
Assessor(s)
L. von Staden, P.J.D. Winter & D. Raimondo
Justification
A range-restricted species (EOO estimated 320-1900 km²) that is still fairly common and is likely to occur at more than 10 locations. There is extensive, ongoing habitat degradation and habitat loss due to mining, expanding human settlements and overgrazing. These threats are likely to increase in future. Not protected in any reserves.
Distribution
Endemism
South African endemic
Provincial distribution
Limpopo
Range
Sekhukhuneland, northern Leolo Mountains and Olifants River Valley.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Savanna
Description
Sekhukhune Plains Bushveld, on well-drained, gravel slopes and along dry riverbeds.
Threats
This species is endemic to Sekhukhune Plains Bushveld (Mucina and Rutherford 2006), an extensively transformed vegetation type that has been classified as Vulnerable (Rouget et al. 2004). The vegetation within the distribution range of A. longirrhizum is 65% transformed (estimated using GIS) mainly due to human settlements, mining and severe overgrazing. This period of habitat transformation is however likely to have been ongoing for longer than three generations and is unlikely to be linearly related to population decline as this species is restricted to rocky areas that are not generally as severely affected by human settlements, agriculture and grazing that tend to be restricted to the deeper alluvial soils of the plains (P.J.D. Winter pers. comm.) The species appear to persist in even extreme overgrazed areas where no grasslands or woody vegetation remains (P.J.D. Winter pers. obs.). However, as the population expands in the region combined with renewed interest in mining, habitat loss and degradation is likely to be increasing in future, and is very likely to ultimately cause declines in the population of A. longirrhizum.
Population
Population trend
Decreasing
Conservation
Not recorded from any formally protected areas.
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Aneilema longirrhizum FadenNT B1ab(iii)Raimondo et al. (2009)
Bibliography

Faden, R.B. 1978. A new species of Aneilema (Commelinaceae) from South Africa. Bothalia 12(3):565-566.


Faden, R.B. 1979. Aneilema longirrhizum. Flowering Plants of Africa 45(3-4):t. 1785.


Mucina, L. and Rutherford, M.C. (eds). 2006. The vegetation of South Africa, Lesotho and Swaziland. Strelitzia 19. South African National Biodiversity Institute, Pretoria.


Obermeyer, A.A. and Faden, R.B. 1985. Commelinaceae. In: O.A. Leistner (ed). Flora of Southern Africa 4 Part 2 Xyridaceae-Juncaceae:23-60. Botanical Research 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
von Staden, L., Winter, P.J.D. & Raimondo, D. 2008. Aneilema longirrhizum Faden. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2021/09/21

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Distribution map


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