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Scientific Name | Diosma pilosa I.Williams |
Higher Classification | Dicotyledons |
Family | RUTACEAE |
National Status |
Status and Criteria | Vulnerable D2 |
Assessment Date | 2012/08/06 |
Assessor(s) | V. Zikishe |
Justification | Diosma pilosa has a very restricted range (EOO 155 km²), with less than five known locations, and potentially threatened by alien invasive plants and too frequent fires. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | Northern slopes of Riviersonderend Mountains near Riviersonderend. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Central Ruens Shale Renosterveld, Breede Alluvium Renosterveld, South Sonderend Sandstone Fynbos, North Sonderend Sandstone Fynbos |
Description | Well-drained, stony, sandstone soil. |
Threats |
| Potentially threatened by alien invasive species and too frequent fire - this species is a reseeder and therefore potentially vulnerable to shortened fire cycles. One subpopulation near Riviersonderend, known from historical records, is possibly already extinct due to habitat loss to crop cultivation. |
Population |
Population trend | Stable |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Diosma pilosa I.Williams | Threatened | 2012.1 | | Diosma pilosa I.Williams | Threatened | Raimondo et al. (2009) | |
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.
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.
Williams, I. 1975. Studies in the genera of the Diosmeae (Rutaceae): 5. Journal of South African Botany 41:167-186.
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Citation |
| Zikishe, V. 2012. Diosma pilosa I.Williams. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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