Clanwilliam Aloe

Scientific Name
Aloe comosa Marloth & A.Berger
Higher Classification
Common Names
Clanwilliam Aloe (e), Clanwilliam-aalwyn (a)
National Status
Status and Criteria
Least Concern
Assessment Date
J.E. Victor & G.F. Smith
Small range (EOO 2000 km²) and few subpopulations and six sites known to date. However, the range is poorly explored and there may be many more subpopulations. Although there are potential threats of harvesting for horticultural purposes and overgrazing by livestock, these threats are not likely to cause a continuing decline, and this species is likely not rare enough to qualify under VU D2.
South African endemic
Provincial distribution
Northern Cape, Western Cape
Swartruggens Mountains northwards to Calvinia and Vanrhynsdorp, also in Olifants River Valley and Cederberg around Clanwilliam.
Habitat and Ecology
Major system
Major habitats
Fynbos, Succulent Karoo
Steep, rocky hillsides, on soils derived mostly from Bokkeveld shale, 300-600 m.
Potentially threatened by illegal plant collection and habitat degradation due to poor rangeland management, especially overgrazing (Van Wyk and Smith 1996). Monitoring is needed to determine whether there is a decline in the population, but at present it does not appear to be declining.
Population trend
Cederberg Wilderness Area.
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Aloe comosa Marloth & A.BergerLeast Concern Raimondo et al. (2009)
Aloe comosa Marloth & A.BergerVU B1B2cVictor (2002)
Aloe comosa Marloth & A.BergerRare 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.

Reynolds, G.W. 1969. The Aloes of South Africa. A.A. Balkema, Cape Town.

Van Wyk, B.-E. and Smith, G. 1996. Guide to the aloes of South Africa. 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. 2009. Aloe comosa Marloth & A.Berger. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2019/05/26

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Distribution map

© C. Paterson-Jones

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