Scientific Name
Acmadenia argillophila I.Williams
Higher Classification
National Status
Status and Criteria
Near Threatened D2
Assessment Date
D. Raimondo, T. Trinder-Smith & S.L. Hutchinson
There has been a decline at the type locality, Boesmansgat Quarry, over the past 30 years due to quarrying, with only seven plants now remaining at this location, but the threat has ceased. Four of seven known locations are potentially threatened by livestock grazing, mining and erosion.
South African endemic
Provincial distribution
Western Cape
Touwsrivier and the eastern side of the Waboomsberg Mountain to Elandsberg north of the Klein Swartberg Mountains.
Habitat and Ecology
Major system
Major habitats
Renosterveld on shale.
Plants at the type locality declined between 1971 and 1977 due to habitat loss to quarrying (Williams 1979), but this threat has however ceased. Plants at other locations are potentially threatened by overgrazing, mining and erosion.

Only two of the seven subpopulations are known to be small (<10 mature individuals) while the other five subpopulations, although no exact figures are recorded, are expected to still exist and not be declining.

Population trend
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Acmadenia argillophila I.WilliamsVU D22012.1
Acmadenia argillophila I.WilliamsVU D2Raimondo et al. (2009)
Acmadenia argillophila I.WilliamsCR D1Victor (2002)
Acmadenia argillophila I.WilliamsRare Hilton-Taylor (1996)

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.

Vlok, J. and Schutte-Vlok, A.L. 2010. Plants of the Klein Karoo. Umdaus Press, Hatfield.

Williams, I. 1979. Studies in the genera of the Diosmeae (Rutaceae): 8. Journal of South African Botany 45(2):147-184.

Williams, I. 1982. Studies in the genera of the Diosmeae (Rutaceae): 13. A revision of the genus Acmadenia. Journal of South African Botany 48(2):169-240.

Raimondo, D., Trinder-Smith, T. & Hutchinson, S.L. 2012. Acmadenia argillophila I.Williams. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2022/09/26

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Distribution map

© J.H. Vlok/A.L. Schutte-Vlok

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