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Scientific Name | Nenax hirta (Cruse) T.M.Salter subsp. hirta |
Higher Classification | Dicotyledons |
Family | RUBIACEAE |
Synonyms | Ambraria hirta Cruse |
National Status |
Status and Criteria | Vulnerable A2c |
Assessment Date | 2021/03/23 |
Assessor(s) | H. Mtshali & D.A. Kamundi |
Justification | This Western Cape endemic has a restricted range and has declined significantly across the lowlands of the south-western Cape, and continues to decline due to ongoing habitat loss and degradation. An estimated population reduction of 30-40% over three generations is inferred from habitat loss over the past 90 years (generation length 30 years). It therefore meets the threshold for Vulnerable under criterion A2. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | This taxon is endemic to the south-western Cape, where it occurs from the Cape Peninsula to Worcester and Piketberg. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Swartberg Shale Renosterveld, Swartland Granite Renosterveld, Breede Shale Fynbos, Atlantis Sand Fynbos |
Description | It is found on gravelly ground or red clayey or white sandy soils. |
Threats |
| A total of 80% of this species' habitat has been irreversibly modified to croplands and urban development. Plants remain in small patches of shale renosterveld and sand fynbos, which continues to decline due to inappropriate fire management and spreading alien invasive plants. |
Population |
Subpopulations remain in small fragments of fynbos renosterveld. Population trends and size are unknown, but population decline is inferred from ongoing habitat loss and degradation. Since 80% of this species' habitat has been lost, the majority since 1940 (82 years), a loss of between 30 and 40% of the population is suspected to have occurred over the past three generations (90 years).
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Nenax hirta (Cruse) T.M.Salter subsp. hirta | Least Concern | Raimondo et al. (2009) | |
Bibliography |
Puff, C. 1986. Paederieae, Anthospermeae, Rubieae. In: O.A. Leistner (ed). Flora of Southern Africa 31 Part 1 Rubiaceae, Fascicle 2 Rubioideae (Second part):1-76. 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.
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Citation |
| Mtshali, H. & Kamundi, D.A. 2021. Nenax hirta (Cruse) T.M.Salter subsp. hirta. National Assessment: Red List of South African Plants version . Accessed on 2024/12/07 |
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