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Scientific Name | Staavia verticillata (L.f.) Pillans |
Higher Classification | Dicotyledons |
Family | BRUNIACEAE |
Synonyms | Staavia nuda Brongn. |
National Status |
Status and Criteria | Endangered B1ab(iii,v)+2ab(iii,v) |
Assessment Date | 2017/07/17 |
Assessor(s) | N.A. Helme & L. von Staden |
Justification | Staavia verticillata is an extremely rare, localized habitat specialist, with an extent of occurrence (EOO) of 69 km², and an area of occupancy (AOO) of less than 24 km². Plants at two to three locations continue to decline due to too frequent fires and competition from unmanaged alien invasive plants. It is therefore listed as Endangered under criterion B. |
Distribution |
Endemism | South African endemic |
Provincial distribution | Western Cape |
Range | This species is endemic to South Africa, and is found in mountains between Bain's Kloof and Du Toit's Kloof. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Hawequas Sandstone Fynbos |
Description | It occurs in shaded, moist gullies on high-altitude sandstone slopes. |
Threats |
| Unmanaged alien invasive pines and hakeas continue to spread into this species' habitat around Bain's Kloof, Du Toit's Kloof and the Hawequas Mountains above Wellington. In addition, the population is declining due to too frequent fires. This species is a slow-growing, long-lived reseeder that is sensitive to fires occurring before plants have matured and set seed for the first time. |
Population |
Subpopulations are extremely small, with less than 10 plants, and occur isolated in small areas of suitable habitat (N.A. Helme pers. obs.). This species occurs in rugged mountainous areas, and therefore its habitat remains incompletely explored. It has been suggested that the total population size could number less than 200 mature individuals, but this is difficult to verify.
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Population trend | Decreasing |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Staavia verticillata (L.f.) Pillans | EN B1ab(iii,v)+2ab(iii,v) | 2020.1 | | Staavia verticillata (L.f.) Pillans | Rare | Raimondo et al. (2009) | | Staavia verticillata (L.f.) Pillans | Indeterminate | 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.
Pillans, N.S. 1947. A revision of Bruniaceae. Journal of South African Botany 13:121-206.
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 |
| Helme, N.A. & von Staden, L. 2017. Staavia verticillata (L.f.) Pillans. National Assessment: Red List of South African Plants version . Accessed on 2024/10/08 |
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