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Scientific Name | Acmadenia rupicola I.Williams |
Higher Classification | Dicotyledons |
Family | RUTACEAE |
National Status |
Status and Criteria | Vulnerable D2 |
Assessment Date | 2012/08/07 |
Assessor(s) | J.E. Victor, D. Raimondo, J.H. Vlok & S.L. Hutchinson |
Justification | Recorded from one, possibly two locations, where the subpopulation numbers ± 2000 individuals and the EOO and AOO is less than 5 km². This species is potentially threatened by alien invasive plants and too frequent fires as it is a slow growing reseeder. It is therefore listed as Vulnerable under criterion D. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | It is found in the Outeniqua Mountains, Robinson's Pass. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | South Outeniqua Sandstone Fynbos |
Description | Plants grow on rocky sandstone outcrops on slopes in montane fynbos, 850 m. |
Threats |
| This slow-growing reseeder is suspected to be very sensitive to fire, as it occurs in a fire refuge habitat. A severe fire in 2001 caused an apparent extensive population reduction, but it appears to have recovered. Too frequent fire is still considered a potential threat, as well as the spread of alien invasive plants. |
Population |
The population appears to fluctuate in response to fire. Before a large fire in 2001, there were between 500 and 1000 plants, but after the fire less than 100 seedlings could be found (J. Vlok pers. obs.). A recount of the population in 2011 found ± 2000 individuals.
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Population trend | Fluctuating |
Conservation |
| Part of the population is protected in Ruitersbos Nature Reserve. |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Acmadenia rupicola I.Williams | CR A2a | Raimondo et al. (2009) | | Acmadenia rupicola I.Williams | VU D2 | Victor (2002) | | Acmadenia rupicola I.Williams | Vulnerable | Hilton-Taylor (1996) | |
Bibliography |
Goldblatt, P. and Manning, J.C. 2000. Cape Plants: A conspectus of the Cape Flora of South Africa. Strelitzia 9. National Botanical Institute, Cape Town.
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.
Victor, J.E. 2002. South Africa. In: J.S. Golding (ed), Southern African plant Red Data Lists. Southern African Botanical Diversity Network Report 14 (pp. 93-120), SABONET, Pretoria.
Williams, I. 1979. Studies in the genera of the Diosmeae (Rutaceae): 8. Journal of South African Botany 45(2):147-184.
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Citation |
| Victor, J.E., Raimondo, D., Vlok, J.H. & Hutchinson, S.L. 2012. Acmadenia rupicola I.Williams. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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