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Scientific Name | Oedera nordenstamii (K.Bremer) Anderb. & K.Bremer |
Higher Classification | Dicotyledons |
Family | ASTERACEAE |
Synonyms | Relhania nordenstamii K.Bremer |
National Status |
Status and Criteria | Endangered B1ab(iii,v)+2ab(iii,v) |
Assessment Date | 2015/05/21 |
Assessor(s) | D. Raimondo & L. von Staden |
Justification | EOO 85 km², plants at two known locations continue to decline due to overgrazing. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Northern Cape |
Range | Richtersveld, Numeesberg and Vandersterrberg. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Central Richtersveld Mountain Shrubland |
Description | Arid mountain summits. |
Threats |
| On the slopes of the Numees Mountain above Helskloof Pass, this species is threatened by severe overgrazing and trampling, causing a loss of vegetation cover, erosion and species diversity. On the summit of the Vandersterrberg, grazing pressure is currently low. However, as rangelands on the plains and closer to settlements are becoming increasingly degraded, herders are starting to move their livestock into the mountains in search of grazing, and it may become more threatened in future. |
Population |
This rare species is currently known from two widely separated subpopulations on the summits of the central Richtersveld mountains. It possibly occurs elsewhere along mountain summits in the area in between.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Oedera nordenstamii (K.Bremer) Anderb. & K.Bremer | EN B1ab(iii,v)+2ab(iii,v) | 2015.1 | | Oedera nordenstamii (K.Bremer) Anderb. & K.Bremer | Rare | Raimondo et al. (2009) | | Oedera nordenstamii (K.Bremer) Anderb. & K.Bremer | Rare | Hilton-Taylor (1996) | |
Bibliography |
Anderberg, A.A. and Bremer, K. 1991. Parsimony analysis and cladistic reclassification of the Relhania generic group (Asteraceae—Gnaphalieae). Annals of the Missouri Botanical Garden 78:1061-1072.
Bremer, K. 1976. The genus Relhania (Compositae). Opera Botanica 40:1-85.
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.
Snijman, D.A. 2013. Plants of the Greater Cape Floristic Region 2: The extra Cape flora. Strelitzia 30. South African National Biodiversity Institute, Pretoria.
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Citation |
| Raimondo, D. & von Staden, L. 2015. Oedera nordenstamii (K.Bremer) Anderb. & K.Bremer. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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