Robertson Vexator

Scientific Name
Vexatorella latebrosa Rourke
Higher Classification
Common Names
Robertson Vexator (e)
National Status
Status and Criteria
Critically Endangered B1ac(iv)+2ac(iv)
Assessment Date
A.G. Rebelo, H. Mtshali & L. von Staden
EOO and AOO 1 km², fire-related extreme population fluctuations occur at one known location. Potentially threatened by too frequent fire.
South African endemic
Provincial distribution
Western Cape
Langeberg Mountains near Robertson.
Habitat and Ecology
Major system
Major habitats
Breede Shale Fynbos
Fynbos-renostreveld ecotones, predominantly on shale soils, 400-900 m. Mature individuals are killed by fires, and only seeds survive. Seeds are relased after ripening, and dispersed by ants to their underground nests, where they are protected from predation and fire. It is pollinated by insects.
Threatened by the fact that the subpopulation is localised and susceptible to too-frequent fire.

In the late 1970's thousands of seedlings were seen (Rourke, 1984a), but protea atlas data suggest 500-1000 plants (1993-2002). This indicates that severe fluctuations can occur. Currently, there are about 1500 plants (N.A. Helme pers. obs. 2011).

Population trend
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Vexatorella latebrosa RourkeCR B1ac(iv)+2ac(iv)Raimondo et al. (2009)
Vexatorella latebrosa RourkeRare 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.

Rebelo, T. 2001. Sasol Proteas: A field guide to the proteas of southern Africa. (2nd ed.). Fernwood Press, Vlaeberg, Cape Town.

Rebelo, A.G., Mtshali, H. & von Staden, L. 2019. Vexatorella latebrosa Rourke. National Assessment: Red List of South African Plants version 2020.1. Accessed on 2024/02/25

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Distribution map

© N.A. Helme

© C. Paterson-Jones

© C. Paterson-Jones

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