Aloe lettyae

Taxonomy
Scientific Name
Aloe lettyae Reynolds
Higher Classification
Monocotyledons
Family
ASPHODELACEAE
National Status
Status and Criteria
Endangered B1ab(iii,v)+2ab(iii,v)
Assessment Date
2015/07/01
Assessor(s)
L. von Staden & S. Kremer-Köhne
Justification
The population of this local endemic has been fragmented due to extensive past habitat loss to timber plantations, and it remains at four, possibly five locations within an EOO of 123 km², and continues to decline due to ongoing habitat loss and degradation.
Distribution
Endemism
South African endemic
Provincial distribution
Limpopo
Range
Haenertsburg to Tzaneen.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Woodbush Granite Grassland
Description
East-facing slopes in Woodbush Granite Grassland.
Threats
Aloe lettyae is endemic to the Critically Endangered Woodbush Granite Grassland, of which less than 30% remains intact, mainly due to extensive loss to timber plantations and agricultural expansion between 1950 and the late 1970s, and only about 10 relatively undisturbed fragments remain, the rest being severely overgrazed and infested with unmanaged alien invasive plants. However, even relatively well-preserved fragments such as the Haenertsburg Townlands continue to be degraded as a result of inappropriate fire management, which is possibly the cause of increasing encroachment by woody species.
Population

This species occurs in small, localized groups of solitary plants - it is not clump forming as other members of the Aloe zebrina complex. Subpopulation size varies between 200 and 1000 mature individuals (S. Kremer-Köhne, pers. obs.). Four subpopulations are known to remain on grassland fragments, and a fifth site, known through historical records, still needs to be surveyed. Grasslands at all other locations known through historical records have been completely lost to timber plantations and agricultural expansion.


Population trend
Decreasing
Conservation
This species does not occur in any formally protected areas.
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Aloe lettyae ReynoldsEN B1ab(iii,v)+2ab(iii,v)2015.1
Bibliography

Reynolds, G.W. 1937. Two new aloes from Zululand and two from the Transvaal. Journal of South African Botany 3:133-141.


Reynolds, G.W. 1940. Aloe lettyae. Flowering Plants of Africa 20:t. 764.


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


Smith, G.F., Figueiredo, E., Klopper, R.R. and Crouch, N.R. 2012. Summer-flowering species of maculate Aloe L. (Asphodelaceae: Alooideae) in the Aloe zebrina-complex from South Africa: reinstatement of four names, and description of A. braamvanwykii Gideon F.Sm. & Figueiredo. Bradleya 30:155-166.


Citation
von Staden, L. & Kremer-Köhne, S. 2015. Aloe lettyae Reynolds. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2019/06/19

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Distribution map


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