| Scientific Name | Adenandra villosa (P.J.Bergius) Licht. ex Roem. & Schult. subsp. biseriata (E.Mey. ex Bartl. & H.L.Wendl.) Strid | Higher Classification | Dicotyledons | Family | RUTACEAE | Synonyms | Adenandra biseriata E.Mey. ex Bartl. & H.L.Wendl. |
National Status | Status and Criteria | Endangered B1ab(iii) | Assessment Date | 2019/03/25 | Assessor(s) | L. von Staden | Justification | A range-restricted taxon (EOO 1750 km²), that has lost more than 60% of its habitat. It remains at five known locations, and continues to decline due to ongoing habitat degradation as well as competition from alien invasive plants. It is therefore listed as Endangered under criterion B. |
Distribution | Endemism | South African endemic | Provincial distribution | Western Cape | Range | This species occurs in the Cape Flats between Darling, Muizenberg and Kuils River. |
Habitat and Ecology | Major system | Terrestrial | Major habitats | Cape Flats Sand Fynbos, Atlantis Sand Fynbos, Swartland Granite Renosterveld, Peninsula Granite Fynbos, Hopefield Sand Fynbos, Peninsula Sandstone Fynbos | Description | It grows in sandy flats and plateaus, rarely rocky lower slopes. |
Threats | | More than 60% of this taxon's habitat has been lost or degraded, predominantly due to urban expansion on the Cape Flats between Muizenberg, Kraaifontein and Stellenbosch, but it has also lost habitat to wheat cultivation in the southern Swartland around Darling, and to vineyards around Stellenbosch. Remaining subpopulations are predominantly threatened by competition from alien invasive plants, which is being cleared at some locations such as the Cape Peninsula and near Mamre. Small fragments are also often overstocked with livestock, leading to overgrazing and degradation. |
Population | This taxon is locally extinct in the southern part of its range, where it is known only from historical records and was last recorded in the 1970s. An isolated subpopulation is likely to remain on the Steenberg Plateau, but surveys are needed to confirm this. Recent field observations recorded it at five locations, all from isolated remnants of lowland fynbos.
| Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Adenandra villosa (P.J.Bergius) Licht. ex Roem. & Schult. subsp. biseriata (E.Mey. ex Bartl. & H.L.Wendl.) Strid | EN B1ab(iii) | 2020.1 | | Adenandra villosa (P.J.Bergius) Licht. ex Roem. & Schult. subsp. biseriata (E.Mey. ex Bartl. & H.L.Wendl.) Strid | Least Concern | Raimondo et al. (2009) | |
Bibliography | 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.
Strid, A. 1972. Revision of the genus Adenandra (Rutaceae). Opera Botanica 32:1-112.
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Citation | | von Staden, L. 2019. Adenandra villosa (P.J.Bergius) Licht. ex Roem. & Schult. subsp. biseriata (E.Mey. ex Bartl. & H.L.Wendl.) Strid. National Assessment: Red List of South African Plants version . Accessed on 2025/04/18 |
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