Aloe thompsoniae

Scientific Name
Aloe thompsoniae Groenew.
Higher Classification
National Status
Status and Criteria
Assessment Date
J.E. Victor & G.F. Smith
Previously listed as EN (Victor 2002). It has a restricted range (EOO<100 km²) but is almost entirely protected within a wilderness area. Illegal collecting was previously mentioned to be threat, but this is unlikely to cause the extinction of this taxon due to the extreme inaccessibility and remoteness of its habitat.
South African endemic
Provincial distribution
Wolkberg Mountains.
Habitat and Ecology
Major system
Major habitats
Montane mistbelt grasslands, rock crevices on steep cliffs, among large boulders, or in seepages or shallow soils at the edges of large exposed rock sheets.
A. thompsoniae is one of the few species of grass aloe native to South Africa that have not suffered declines due to habitat transformation to forestry plantations (Craib 2005). Although there are plantations on the lower slopes of the Wolkberg the summit is unaffected and protected as a wilderness area. Escaping alien seedlings are also observed to be cleared (Craib 2005). Van Wyk and Smith (1996) mentions illegal collecting as a threat to this species, however, the Wolkberg is a protected wilderness area with few roads and plants are generally inaccessible to collectors. It is unlikely that collecting would cause a decline or the extinction of this species.
Population trend
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Aloe thompsoniae Groenew.Rare Raimondo et al. (2009)
Aloe thompsoniae Groenew.EN B1B2eVictor (2002)
Aloe thompsoniae Groenew.Indeterminate Hilton-Taylor (1996)
Aloe thompsoniae Groenew.Uncertain Hall et al. (1980)

Craib, C. 2005. Grass Aloes in the South African Veld. Umdaus Press, Hatfield.

Hall, A.V., De Winter, M., De Winter, B. and Van Oosterhout, S.A.M. 1980. Threatened plants of southern Africa. South African National Scienctific Programmes Report 45. CSIR, Pretoria.

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.

Van Wyk, B.-E. and Smith, G. 1996. Guide to the aloes of South Africa. Briza Publications, Pretoria.

Van Wyk, B.-E. and Smith, G. 2003. Guide to aloes of South Africa. (2nd ed.). Briza Publications, 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.

Victor, J.E. & Smith, G.F. 2004. Aloe thompsoniae Groenew. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2019/05/26

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Distribution map

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