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Scientific Name | Huernia procumbens (R.A.Dyer) L.C.Leach |
Higher Classification | Dicotyledons |
Family | APOCYNACEAE |
Synonyms | Duvalia procumbens R.A.Dyer |
National Status |
Status and Criteria | Vulnerable B1ab(iii)+2ab(iii) |
Assessment Date | 2019/04/10 |
Assessor(s) | L. von Staden |
Justification | Huernia procumbens is a highly range-restricted species, with an extent of occurrence (EOO) of 297 km², and is known from six locations. A continuing decline is inferred from ongoing habitat degradation. |
Distribution |
Endemism | Not endemic to South Africa |
Provincial distribution | Limpopo |
Range | This species occurs from Mutale to Pafuri, in northern Limpopo, to the Pesu River Valley in southern Zimbabwe. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Limpopo Ridge Bushveld, Makuleke Sandy Bushveld |
Description | It occurs on rock outcrops and rock ledges on southern aspects of low hills and river valleys, under the shade of Lebombo Ironwood (Androstachys johnsonii). |
Threats |
| This species is threatened by ongoing habitat degradation due to severe overgrazing of communal rangelands between Mutale and the western edge of the Kruger National Park. Over-exploitation of woody species for construction materials and firewood is also causing ongoing degradation of this shade-dependent species' habitat. |
Population |
This species is known from six locations, four between Masisi and the Pafuri Gate, and two inside the Kruger Park. This species is also known from a single location in the Pesu River Valley in southern Zimbabwe. Field observations by Hahn (2002) indicate ongoing habitat degradation, from which continuing decline is inferred. This species was last recorded in the wild more than 15 years ago, and field surveys are urgently needed.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Huernia procumbens (R.A.Dyer) L.C.Leach | VU B1ab(iii)+2ab(iii) | 2020.1 | | Huernia procumbens (R.A.Dyer) L.C.Leach | Least Concern | Raimondo et al. (2009) | |
Bibliography |
Bruyns, P.V. 2005. Stapeliads of southern Africa and Madagascar. (Vol. 1, pp. 1-330). Umdaus Press, Pretoria.
Dyer, R.A. 1956. Duvalia procumbens. Flowering plants of South Africa 31:t. 1218.
Hahn, N. 2002. Endemic flora of the Soutpansberg. Unpublished MSc, Univeristy of Natal, Pietermaritzburg.
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.
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Citation |
| von Staden, L. 2019. Huernia procumbens (R.A.Dyer) L.C.Leach. National Assessment: Red List of South African Plants version . Accessed on 2024/10/06 |
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